NTS, Ntu e

NTS & NTU Series
Installation manual
True Sine Wave Inverter

High Reliable Inverter
NTS/NTU series are MEAN WELL's new generation high-reliability off-
grid DC-AC pure sine wave inver ters. The whole family has
N T S - 2 5 0 P / 4 0 0 P, N T S - 3 0 0 / 4 5 0 / 7 5 0 / 1 2 0 0 / 1 7 0 0 / 2 2 0 0 / 3 2 0 0 ,
and NTU-1200/1700/2200/3200 series . The whole family of NTS/NTU are
fully digital designed, with three major characteristics of miniaturization,
high efficiency, and intelligence. The main features are, instantaneous
peak load capacity which can reach up to 2 times of output wattage, as
well as AC output voltage/frequency/power saving mode adjustment
capability through the DIP switch of front panel (the idle standby
consumption is 1.5W). It’s efficiency reaches up to 93%, and it can be
operated within temperature range from -25~+70℃. Built-in remote
control, able to monitor the battery voltage and the load status of the
inverter through IRC1/2/3. Not only intergrated multiple intelligent
protections, but also passed safety regulations such as
CB/DEKRA/E13/EAC/UL/RCM/FCC/CE/UKCA. Materials and components
are strictly selected and 3-year warranty is provided. It is suitable for
households, vehicles, yacht and remote areas without power grids.
Common application such as, lighting, air conditioning, refrigerators, hair
dryers, microwave ovens , computers, televisions, hand-held power tools,
motor equipment, mobile AC power... etc.
Index
1.Safety Guidelines 1 6 . Protections and Failure 47

2.Introduction 2 Correction
2.1 Model number 2 6 . 1 Protections 47
2.2 Features 2 6.2 Failure Correction 48
2.3 Main specification 3 7.Warranty 49

2.4 Safety Overview 16
2.5 Derating curve 17
2.6 Mechanical specification 18
3.Installation & Wiring 24
3.1 Precautions 24
3.2 System Block Diagram 24
3.3 Installation procedures 25
3.4 Cable selection 25
3.5 Battery selection 26
4.User Interface Panel 27
4.1 AC panel 27
4.2 DC panel 29
4.3 LED indicator 30
5.Explanation of settings 32
5.1 Procedure of Setting 32
Operating Mode, Output
Voltage, Frequency, and
power Saving Mode
5.2 Function difference 33
5.3 IRC1/IRC2/IRC3 Remote 33
control unit
5.4 RS-232/UART protocol 34
5.5 UPS mode(only for 45
NTU series)
2022.08 Ver 5
1 1 . Safety Guidelines 2 . Introduction
n Risk of electrical shock and energy hazard. All failures should be examined by 2.1 Model number
the qualified technician. Please do not remove the case of the inverter by
NTS - 300 - 1 12 US
yourself. 2
n Please do not install the inverter in places with high moisture or near water.
AC Socket
n Please do not install the inverter in places with high ambient temperature or
(US、EU、CN、AU、UK、UN、GFCI)
under direct sunlight.
DC Input voltage (12: 12Vdc, 24: 24Vdc, 48: 48Vdc)
n Please only connect batteries with the same brand and model number in one
battery bank. Using batteries from different manufacturers or different AC output voltage (1: 100~120Vac, 2:200~240Vac)
capacity is strictly prohibited! Rated power (250W~3200W)
n Never allow a spark or flame in the vicinity of the batteries because they may Series name (NTS, NTU)
ignite explosive gases during normal operation.
n Make sure the air flow from the fan is not obstructed at both sides (front and
back) of the inverter. (Please allow at least 15cm of space)
n Please do not stack any object on the inverter.
2.2 Features
n Please do not turn on the inverter before start the engine if inverter connected
to vehicle's battery directly. l Full digital design with compact size and light weight.
l True sine wave output(THD<3%)
n Risque de choc électrique et danger d'électrocution. Toutes les pannes doivent l Peak power up to 1.7~ 2 times
être examinées par un technicien qualifié. Veuillez ne pas retirer vous-même le l AC voltage, frequency, power saving mode selectable.
boîtier de l'onduleur. l Multiple intelligent protections
n N'installez pas l'onduleur dans des endroits très humides ou à proximité d'eau. DC Input：Reverse polarity protection/ Low DC voltage protection/
n N'installez l'onduleur dans des endroits où la température ambiante est élevée DC over voltage protection.
ou sous la lumière directe du soleil. AC Output：Short circuit protection, over load protection, over
n Veuillez ne insérer que des batteries de la même marque et du même modèle temperature protection.
dans un seul banc de batteries. L'utilisation de batteries de fabricants l LED indicator：Status, DC input, load status, AC input.
différents ou de capacités différentes est strictement interdite! l Built-in Remote control
n Ne laissez jamais une étincelle ou une flamme à proximité des batteries car l Support IRC1/2/3 for 750~3200W models(optional)
elles peuvent enflammer des gaz explosifs lors du fonctionnement normal. l UPS functions( only for NTU series)
n Assurez-vous que le flux d'air du ventilateur n'est pas obstrué des deux côtés l Wide range of DC input voltage for lead acid or lithium battries.
(avant et arrière) de l'onduleur. (Veuillez laisser au moins 15 cm d'espace) l CB/DEKRA/E13/EAC/UL/RCM/FCC/CE/UKCA certified.
n N'empilez aucun objet sur l'onduleur.

l 3 year warranty
n N'allumez pas l'onduleur avant de démarrer le moteur si l'onduleur est

connecté directement à la batterie du véhicule.
1 2
2.3 Specification
NTS-250P series NTS-400P series
MODEL NTS-250P-112 NTS-250P-124 NTS-250P-148 NTS-250P-212 NTS-250P-224 NTS-250P-248 MODEL NTS-400P-112 NTS-400P-124 NTS-400P-148 NTS-400P-212 NTS-400P-224 NTS-400P-248
RATED POWER(Continuous) 250W RATED POWER(Continuous) 400W
2 OVER RATED POWER(3 Min.) 287.5W OVER RATED POWER(3 Min.) 460W 2
PEAK POWER(10 Sec.) 375W PEAK POWER(10 Sec.) 600W
SURGE POWER(30 Cycles) 500W SURGE POWER(30 Cycles) 800W
Default setting set at 110VAC Default setting set at 230VAC Default setting set at 110VAC Default setting set at 230VAC
AC VOLTAGE AC VOLTAGE
OUTPUT 100 / 110 / 115 / 120Vac selectable by DIP S.W 200 / 220 / 230 / 240Vac selectable by DIP S.W OUTPUT 100 / 110 / 115 / 120Vac selectable by DIP S.W 200 / 220 / 230 / 240Vac selectable by DIP S.W
Default setting set at 60Hz±0.1Hz Default setting set at 50Hz±0.1Hz Default setting set at 60Hz±0.1Hz Default setting set at 50Hz±0.1Hz
FREQUENCY FREQUENCY
50/60Hz selectable by DIP S.W 50/60Hz selectable by DIP S.W 50/60Hz selectable by DIP S.W 50/60Hz selectable by DIP S.W
WAVEFORM Note.1 True sine wave (THD<3%) WAVEFORM Note.1 True sine wave (THD<3%)
AC REGULATION ±3.0% at rated input voltage AC REGULATION ±3.0% at rated input voltage
LED STATUS Please refer to section 3.4 of installation manual LED STATUS Please refer to section 3.4 of installation manual
BAT. VOLTAGE 12V 24V 48V 12V 24V 48V BAT. VOLTAGE 12V 24V 48V 12V 24V 48V
VOLTAGE RANGE (Typ.) 10 ~ 16.5Vdc 20 ~ 33Vdc 40 ~ 66Vdc 10 ~ 16.5Vdc 20 ~ 33Vdc 40 ~ 66Vdc VOLTAGE RANGE (Typ.) 10 ~ 16.5Vdc 20 ~ 33Vdc 40 ~ 66Vdc 10 ~ 16.5Vdc 20 ~ 33Vdc 40 ~ 66Vdc
DC CURRENT (Typ.) 25A 13A 7A 25A 13A 7A DC CURRENT (Typ.) 40A 20A 10A 40A 20A 10A
NO LOAD NON-SAVING MODE 10W 10W 12W 10W 10W 12W NO LOAD NON-SAVING MODE 10W 10W 12W 10W 10W 12W
INPUT DISSPATION Default disable, ≦1.2W ~ 1.5W by models @ auto detec AC output load≦10W will be changed to saving mode INPUT DISSPATION Default disable, ≦1.2W ~ 1.5W by models @ auto detec AC output load≦10W will be changed to saving mode
SAVING MODE SAVING MODE
(Typ.) 1.2W 1.3W 1.5W 1.2W 1.3W 1.5W (Typ.) 1.2W 1.3W 1.5W 1.2W 1.3W 1.5W
OFF MODE CURRENT DRAW <1mA at battery ~DC input must be disconnected OFF MODE CURRENT DRAW <1mA at battery ~DC input must be disconnected
EFFICIENCY (Typ.) Note.1 91% 91% 92% 92% 93% 93% EFFICIENCY (Typ.) Note.1 89% 91% 91% 91% 93% 93%
BATTERY TYPES Lead Acid or li-ion BATTERY TYPES Lead Acid or li-ion
FUSE (INTERNAL) 30A*2 30A*1 10A*2 30A*2 30A*1 10A*2 FUSE (INTERNAL) 40A*2 30A*2 10A*2 40A*2 30A*2 10A*2
ALARM 11±0.3Vdc 22±0.5Vdc 44±1Vdc 11±0.3Vdc 22±0.5Vdc 44±1Vdc ALARM 11±0.3Vdc 22±0.5Vdc 44±1Vdc 11±0.3Vdc 22±0.5Vdc 44±1Vdc
LOW SHUTDOWN 10±0.3Vdc 20±0.5Vdc 40±1Vdc 10±0.3Vdc 20±0.5Vdc 40±1Vdc LOW SHUTDOWN 10±0.3Vdc 20±0.5Vdc 40±1Vdc 10±0.3Vdc 20±0.5Vdc 40±1Vdc
DC INPUT
DC INPUT
RESTART 12.5±0.3Vdc 25±0.5Vdc 50±1Vdc 12.5±0.3Vdc 25±0.5Vdc 50±1Vdc RESTART 12.5±0.3Vdc 25±0.5Vdc 50±1Vdc 12.5±0.3Vdc 25±0.5Vdc 50±1Vdc
ALARM 15.5±0.3Vdc 31±0.5Vdc 62±1Vdc 15.5±0.3Vdc 31±0.5Vdc 62±1Vdc ALARM 15.5±0.3Vdc 31±0.5Vdc 62±1Vdc 15.5±0.3Vdc 31±0.5Vdc 62±1Vdc
PROTECTION
PROTECTION
HIGH SHUTDOWN 16.5±0.3Vdc 33±0.5Vdc 66±1Vdc 16.5±0.3Vdc 33±0.5Vdc 66±1Vdc HIGH SHUTDOWN 16.5±0.3Vdc 33±0.5Vdc 66±1Vdc 16.5±0.3Vdc 33±0.5Vdc 66±1Vdc
RESTART 15±0.3Vdc 30±0.5Vdc 60±1Vdc 15±0.3Vdc 30±0.5Vdc 60±1Vdc RESTART 15±0.3Vdc 30±0.5Vdc 60±1Vdc 15±0.3Vdc 30±0.5Vdc 60±1Vdc
BAT. POLARITY By internal fuse open BAT. POLARITY By internal fuse open
OVER TEMPERATURE Protection type : Shut down o/p voltage, re-power on to recover OVER TEMPERATURE Protection type : Shut down o/p voltage, re-power on to recover
AC OUTPUT
AC OUTPUT
OUTPUT SHORT Protection type : Shut down o/p voltage, re-power on to recover OUTPUT SHORT Protection type : Shut down o/p voltage, re-power on to recover
105 ~ 115% load for 180 sec., 115% ~ 150% load for 10 sec. 105 ~ 115% load for 180 sec., 115% ~ 150% load for 10 sec.
OVER LOAD (Typ.) OVER LOAD (Typ.)
Protection type : Shut down o/p voltage, re-power on to recover Protection type : Shut down o/p voltage, re-power on to recover
REMOTE CONTROL Power ON-OFF remote control by front panel dry contact connector (by RELAY) REMOTE CONTROL Power ON-OFF remote control by front panel dry contact connector (by RELAY)
FUNCTION FUNCTION
DRY CONTACT Open : Normal work ; Short : Remote off DRY CONTACT Open : Normal work ; Short : Remote off
WORK TEMP. -20 ~ +70℃(Refer to “Derating curve”) WORK TEMP. -20 ~ +70℃(Refer to “Derating curve”)
ENVIRON- WORKING HUMIDITY 20 ~ 90% RH non-condensing ENVIRON- WORKING HUMIDITY 20 ~ 90% RH non-condensing
MENT STORAGE TEMP., HUMIDITY -30 ~ +70℃ / -22 ~ +158 F, 10 ~ 95% RH non-condensing
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VIBRATION 10 ~ 500Hz, 3G 10min./1cycle, 60min. each along X, Y, Z axes VIBRATION 10 ~ 500Hz, 3G 10min./1cycle, 60min. each along X, Y, Z axes
MTBF 279K hrs min. Telcordia TR/SR-332 (Bellcore) ; 84K hrs min. MIL-HDBK-217F (25℃) MTBF 278.7K hrs min. Telcordia TR/SR-332 (Bellcore) ; 84K hrs min. MIL-HDBK-217F (25℃)
OTHER DIMENSION 186*100.5*32mm (L*W*H) OTHER DIMENSION 186*100.5*32mm (L*W*H)
PACKING 0.75Kg; 18pcs/ 14.5Kg/ 0.97CUFT PACKING 0.75Kg; 18pcs/ 14.5Kg/ 0.97CUFT
3 4
NTS-300 series NTS-450 series
NTS-300-112 NTS-300-124 NTS-300-148 NTS-300-212 NTS-300-224 NTS-300-248 NTS-450-112 NTS-450-124 NTS-450-148 NTS-450-212 NTS-450-224 NTS-450-248
MODEL MODEL
= US, GFCI, UN = EU, CN, AU, UK, UN = US, GFCI, UN = EU, CN, AU, UK, UN
OVER RATED POWER(3 Min.) 345W OVER RATED POWER(3 Min.) 517.5W
2 PEAK POWER(10 Sec.) 450W PEAK POWER(10 Sec.) 675W 2
Default setting set at 60Hz±0.1Hz Default setting set at 50Hz±0.1Hz Default setting set at 60Hz±0.1Hz Default setting set at 50Hz±0.1Hz
FREQUENCY FREQUENCY
FRONT PANEL LED Please refer to section 3.4 of installation manual FRONT PANEL LED Please refer to section 3.4 of installation manual
NO LOAD NON-SAVING MODE 10W 10W 12W 10W 10W 12W NO LOAD NON-SAVING MODE 10W 10W 12W 10W 10W 12W
INPUT DISSPATION Default disable, ≦1.2W ~ 1.5W by models @ auto detec AC output load≦10W will be changed to saving mode INPUT DISSPATION Default disable, ≦1.2W ~ 1.5W by models @ auto detec AC output load≦10W will be changed to saving mode
OFF MODE CURRENT DRAW ≦1mA OFF MODE CURRENT DRAW ≦1mA
DC INPUT
DC INPUT
PROTECTION
PROTECTION
AC OUTPUT
AC OUTPUT
Design refer to UL458 Design refer to UL458
GFCI PROCTECTION None GFCI PROCTECTION None
(Only for “GFCI” AC socket , by request) (Only for “GFCI” AC socket , by request)
REMOTE CONTROL Power ON-OFF remote control by front panel dry contact connector (by RELAY) REMOTE CONTROL Power ON-OFF remote control by front panel dry contact connector (by RELAY)
FUNCTION FUNCTION
DRY CONTACT Open : Normal work ; Short : Remote off DRY CONTACT Open : Normal work ; Short : Remote off
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MTBF 281.9K hrs min. Telcordia TR/SR-332 (Bellcore) ; 85.3K hrs min. MIL-HDBK-217F (25℃) MTBF 281.3K hrs min. Telcordia TR/SR-332 (Bellcore) ; 85K hrs min. MIL-HDBK-217F (25℃)
OTHER DIMENSION 210*130*55mm (L*W*H) OTHER DIMENSION 210*130*55mm (L*W*H)
5 6
MODEL MODEL
= US, GFCI, UN = EU, CN, AU, UK, UN = US, GFCI, UN = EU, CN, AU, UK, UN
OVER RATED POWER(3 Min.) 862.5W OVER RATED POWER(3 Min.) 1380W
2 PEAK POWER(10 Sec.) 1125W PEAK POWER(10 Sec.) 1800W 2
Default setting set at 60±0.1Hz Default setting set at 50Hz±0.1Hz Default setting set at 60±0.1Hz Default setting set at 50Hz±0.1Hz
FREQUENCY FREQUENCY
NO LOAD NON-SAVING MODE 10W 10W 12W 10W 10W 12W NO LOAD NON-SAVING MODE 15W 25W
INPUT DISSPATION Default disable, ≦1.2W ~ 1.5W by models @ auto detec AC output load≦10W will be changed to saving mode INPUT DISSPATION Default disable, auto detec AC output load ≦10W will be changed to saving mode
DC INPUT
DC INPUT
PROTECTION
PROTECTION
AC OUTPUT
AC OUTPUT
UL458 (Only for “GFCI” CIRCUIT BREAKER 15A 10A
GFCI PROCTECTION None
AC socket , by request) GFCI PROCTECTION UL458 (Only for “GFCI” AC socket) None
Power ON-OFF remote control by front panel dry contact connector (by RELAY)
REMOTE CONNECTOR REMOTE
Open : Normal work ; Short : Remote off CONNECTOR
FUNCTION CONTROL CONTROL
Open : Normal work ; Short : Remote off
ACCESSORY Remote controller sold separately, Order No.: IRC1,IRC2,IRC3 FUNCTION ACCESSORY Remote controller sold separately, Order No.: IRC1,IRC2,IRC3
RS-232 COMMUNICATION RS-232 ~ RJ11 Type connector
ENVIRON- WORKING HUMIDITY 20 ~ 90% RH non-condensing WORKING HUMIDITY 20 ~ 90% RH non-condensing
ENVIRON-
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MTBF 238.6K hrs min. Telcordia TR/SR-332 (Bellcore) ; 78K hrs min. MIL-HDBK-217F (25℃) MTBF 198.9K hrs min. Telcordia TR/SR-332 (Bellcore) ; 62.0K hrs min. MIL-HDBK-217F (25℃)
7 8
MODEL MODEL
= US, GFCI, UN = EU, CN, AU, UK, UN = US, UN, TB = EU, CN, AU, UK, UN, TB
RATED POWER(Continuous) 1500W 1700W RATED POWER(Continuous) 2200W
OVER RATED POWER(3 Min.) 1750W 2000W OVER RATED POWER(3 Min.) 2530W
2 PEAK POWER(10 Sec.) 2250W 2550W PEAK POWER(10 Sec.) 3300W 2
SURGE POWER(30 Cycles) 3000W 3400W SURGE POWER(30 Cycles) 4400W
FREQUENCY FREQUENCY
DC CURRENT (Typ.) 150A 75A 37.5A 170A 85A 42.5A DC CURRENT (Typ.) 250A 120A 60A 250A 120A 60A
NO LOAD Default disable, ≦1.2W ~1.5W by models @ auto detect AC output load≦10W will be NO LOAD
Default disable, auto detec AC output load ≦10W will be changed to saving mode
INPUT DISSPATION SAVING MODE changed to saving mode INPUT DISSPATION SAVING MODE
(Typ.) 1.2W 1.4W 1.5W 1.2W 1.4W 1.5W (Typ.) 1.7W
DC INPUT
DC INPUT
PROTECTION
PROTECTION
AC OUTPUT
AC OUTPUT
CIRCUIT BREAKER(GFCI) 15A 10A CIRCUIT BREAKER 25A (Only for “TB” AC socket) None
GFCI PROCTECTION UL458 (Only for “GFCI” AC socket) None TB TYPE UL458 (Only for “TB” AC socket) None
Power ON-OFF remote control by front panel dry contact connector (by RELAY) Power ON-OFF remote control by front panel dry contact connector (by RELAY)
REMOTE CONNECTOR REMOTE CONNECTOR
Open : Normal work ; Short : Remote off Open : Normal work ; Short : Remote off
CONTROL FUNCTION CONTROL
FUNCTION ACCESSORY Remote controller sold separately, Order No.: IRC1,IRC2,IRC3 ACCESSORY Remote controller sold separately, Order No.: IRC1,IRC2,IRC3
RS-232 COMMUNICATION RS-232 ~ RJ11 Type connector RS-232 COMMUNICATION RS-232 ~ RJ11 Type connector
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MTBF 475.5K hrs min. Telcordia TR/SR-332 (Bellcore) ; 46.2K hrs min. MIL-HDBK-217F (25℃) MTBF 364.7K hrs min. Telcordia TR/SR-332 (Bellcore) ; 34.9K hrs min. MIL-HDBK-217F (25℃)
PACKING 4.63Kg; 2pcs/ 12Kg/ 1.76CUFT PACKING 8.6Kg; 1pcs/ 10.4Kg/ 1.39CUFT
9 10
NTS-3200 series NTU-1200 series ( Built-in UPS function )
NTS-3200-112 NTS-3200-124 NTS-3200-148 NTS-3200-212 NTS-3200-224 NTS-3200-248 NTU-1200-112 NTU-1200-124 NTU-1200-148 NTU-1200-212 NTU-1200-224 NTU-1200-248
MODEL MODEL
= US, UN, TB = EU, CN, AU, UK, UN, TB = US, GFCI, UN = EU, CN, AU, UK, UN
FREQUENCY FREQUENCY
NO LOAD NO LOAD NON-SAVING MODE 15W 25W
INPUT DISSPATION SAVING MODE INPUT DISSPATION Default disable, auto detec AC output load ≦10W will be changed to saving mode
SAVING MODE
(Typ.) 1.7W (Typ.) <8W
DC INPUT
DC INPUT
PROTECTION
PROTECTION
AC OUTPUT
AC OUTPUT
CIRCUIT BREAKER 30A (Only for “TB” AC socket) None CIRCUIT BREAKER 15A 10A
TB TYPE UL458 (Only for “TB” AC socket) None GFCI PROCTECTION UL458 (Only for “GFCI” AC socket) None
Power ON-OFF remote control by front panel dry contact connector (by RELAY) Power ON-OFF remote control by front panel dry contact connector (by RELAY)
REMOTE CONNECTOR REMOTE CONNECTOR
Open : Normal work ; Short : Remote off Open : Normal work ; Short : Remote off
FUNCTION CONTROL CONTROL
ACCESSORY Remote controller sold separately, Order No.: IRC1,IRC2,IRC3 FUNCTION ACCESSORY Remote controller sold separately, Order No.: IRC1,IRC2,IRC3
RS-232 COMMUNICATION RS-232 ~ RJ11 Type connector RS-232 COMMUNICATION RS-232 ~ RJ11 Type connector
WORK TEMP. -25 ~ +70℃(Refer to “Derating curve”) AC INPUT RANGE 100/110/115/120Vac±16%, recover±13% 200/220/230/240Vac±16%, recover±13%
WORKING HUMIDITY 20 ~ 90% RH non-condensing AC UPS FREQUENCY RANGE 45 ~ 65Hz
ENVIRON- MODE
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TRASFER TIME (Typ.) 10ms inverter AC by pass
VIBRATION 10 ~ 500Hz, 3G 10min./1cycle, 60min. each along X, Y, Z axes WORK TEMP. -25 ~ +70℃(Refer to “Derating curve”)
MTBF 336.9K hrs min. Telcordia TR/SR-332 (Bellcore) ; 30.5K hrs min. MIL-HDBK-217F (25℃) ENVIRON- WORKING HUMIDITY 20 ~ 90% RH non-condensing
OTHER DIMENSION 420*270*98mm (L*W*H) MENT STORAGE TEMP., HUMIDITY -30 ~ +70℃ / -22 ~ +158 F, 10 ~ 95% RH non-condensing
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PACKING 8.6Kg; 1pcs/ 10.4Kg/ 1.39CUFT VIBRATION 10 ~ 500Hz, 3G 10min./1cycle, 60min. each along X, Y, Z axes
MTBF 166.3K hrs min. Telcordia TR/SR-332 (Bellcore) ; 58.3K hrs min. MIL-HDBK-217F (25℃)
OTHER DIMENSION 333*184*70mm (L*W*H)
PACKING 3.3Kg; 2pcs/ 7.6Kg/ 1.16CUFT
11 12
NTU-1700 series ( Built-in UPS function ) NTU-2200 series ( Built-in UPS function )
NTU-1700-112 NTU-1700-124 NTU-1700-148 NTU-1700-212 NTU-1700-224 NTU-1700-248 NTU-2200-112 NTU-2200-124 NTU-2200-148 NTU-2200-212 NTU-2200-224 NTU-2200-248
MODEL MODEL
= US, GFCI, UN = EU, CN, AU, UK, UN = US, UN, TB = EU, CN, AU, UK, UN, TB
FREQUENCY FREQUENCY
DC CURRENT (Typ.) 150A 75A 37.5A 170A 85A 42.5A DC CURRENT (Typ.) 250A 120A 60A 250A 120A 60A
INPUT POWER SAVING MODE ≦1.2W@standby saving, mode when AC output load ≦10W, auto wake up when AC output load ≧15W NO LOAD
OFF MODE CURRENT DRAW ≦1mA INPUT DISSPATION SAVING MODE
EFFICIENCY (Typ.) Note.1 89% 90% 91% 90% 92% 93% (Typ.) 15W
BATTERY TYPES Lead Acid or li-ion OFF MODE CURRENT DRAW ≦2mA
FUSE (INTERNAL) 40A*5 30A*3 30A*2 40A*5 30A*3 30A*2 EFFICIENCY (Typ.) Note.1 89% 90% 91% 90% 92% 93%
ALARM 11±0.3Vdc 22±0.5Vdc 44±1Vdc 11±0.3Vdc 22±0.5Vdc 44±1Vdc BATTERY TYPES Lead Acid or li-ion
LOW SHUTDOWN 10±0.3Vdc 20±0.5Vdc 40±1Vdc 10±0.3Vdc 20±0.5Vdc 40±1Vdc FUSE (INTERNAL) 40A*8 40A*4 25A*4 40A*8 40A*4 25A*4
DC INPUT
RESTART 12.5±0.3Vdc 25±0.5Vdc 50±1Vdc 12.5±0.3Vdc 25±0.5Vdc 50±1Vdc ALARM 11±0.3Vdc 22±0.5Vdc 44±1Vdc 11±0.3Vdc 22±0.5Vdc 44±1Vdc
ALARM 15.5±0.3Vdc 31±0.5Vdc 62±1Vdc 15.5±0.3Vdc 31±0.5Vdc 62±1Vdc LOW SHUTDOWN 10±0.3Vdc 20±0.5Vdc 40±1Vdc 10±0.3Vdc 20±0.5Vdc 40±1Vdc
DC INPUT
HIGH SHUTDOWN 16.5±0.3Vdc 33±0.5Vdc 66±1Vdc 16.5±0.3Vdc 33±0.5Vdc 66±1Vdc RESTART 12.5±0.3Vdc 25±0.5Vdc 50±1Vdc 12.5±0.3Vdc 25±0.5Vdc 50±1Vdc
PROTECTION
RESTART 15±0.3Vdc 30±0.5Vdc 60±1Vdc 15±0.3Vdc 30±0.5Vdc 60±1Vdc ALARM 15.5±0.3Vdc 31±0.5Vdc 62±1Vdc 15.5±0.3Vdc 31±0.5Vdc 62±1Vdc
BAT. POLARITY HIGH SHUTDOWN 16.5±0.3Vdc 33±0.5Vdc 66±1Vdc 16.5±0.3Vdc 33±0.5Vdc 66±1Vdc
PROTECTION
By internal fuse open
OVER TEMPERATURE Protection type : Shut down o/p voltage, re-power on to recover RESTART 15±0.3Vdc 30±0.5Vdc 60±1Vdc 15±0.3Vdc 30±0.5Vdc 60±1Vdc
OUTPUT SHORT Protection type : Shut down o/p voltage, re-power on to recover BAT. POLARITY By internal fuse open
AC OUTPUT
105 ~ 115% load for 180 sec., 115% ~ 150% load for 10 sec. OVER TEMPERATURE Protection type : Shut down o/p voltage, re-power on to recover
OVER LOAD (Typ.)
OUTPUT SHORT
AC OUTPUT
CIRCUIT BREAKER(GFCI) 15A 10A 105 ~ 115% load for 180 sec., 115% ~ 150% load for 10 sec.
OVER LOAD (Typ.)
GFCI PROCTECTION UL458 (Only for “GFCI” AC socket) None Protection type : Shut down o/p voltage, re-power on to recover
Power ON-OFF remote control by front panel dry contact connector (by RELAY) CIRCUIT BREAKER 25A 15A
REMOTE CONNECTOR
Open : Normal work ; Short : Remote off TB TYPE UL458 (Only for “TB” AC socket) None
FUNCTION CONTROL
ACCESSORY Remote controller sold separately, Order No.: IRC1,IRC2,IRC3 Power ON-OFF remote control by front panel dry contact connector (by RELAY)
REMOTE CONNECTOR
RS-232 COMMUNICATION RS-232 ~ RJ11 Type connector Open : Normal work ; Short : Remote off
FUNCTION CONTROL
AC INPUT RANGE 100/110/115/120Vac±16%, recover±13% 200/220/230/240Vac±16%, recover±13% ACCESSORY Remote controller sold separately, Order No.: IRC1,IRC2,IRC3
AC UPS FREQUENCY RANGE 45 ~ 65Hz RS-232 COMMUNICATION RS-232 ~ RJ11 Type connector
MODE
TRASFER TIME (Typ.) 10ms inverter AC by pass AC INPUT RANGE 100/110/115/120Vac±16%, recover±13% 200/220/230/240Vac±16%, recover±13%
AC UPS FREQUENCY RANGE
WORK TEMP. -20 ~ +70℃(Refer to “Derating curve”) 45 ~ 65Hz
MODE
WORKING HUMIDITY 20 ~ 90% RH non-condensing TRASFER TIME (Typ.) 10ms inverter AC by pass
ENVIRON-
MENT STORAGE TEMP., HUMIDITY -30 ~ +70℃ / -22 ~ +158oF, 10 ~ 95% RH non-condensing WORK TEMP. -25 ~ +70℃(Refer to “Derating curve”)
VIBRATION 10 ~ 500Hz, 3G 10min./1cycle, 60min. each along X, Y, Z axes ENVIRON- WORKING HUMIDITY 20 ~ 90% RH non-condensing
MTBF 421.9K hrs min. Telcordia TR/SR-332 (Bellcore) ; 45.3K hrs min. MIL-HDBK-217F (25℃) MENT STORAGE TEMP., HUMIDITY -30 ~ +70℃ / -22 ~ +158 F, 10 ~ 95% RH non-condensing
o
OTHER DIMENSION 400*184*70mm (L*W*H) VIBRATION 10 ~ 500Hz, 3G 10min./1cycle, 60min. each along X, Y, Z axes
PACKING 4.63Kg; 2pcs/ 12Kg/ 1.76CUFT MTBF 344.9K hrs min. Telcordia TR/SR-332 (Bellcore) ; 34.8K hrs min. MIL-HDBK-217F (25℃)
13 14
NTU-3200 series ( Built-in UPS function ) 2.4 Safety Overview
NTU-3200-112 NTU-3200-124 NTU-3200-148 NTU-3200-212 NTU-3200-224 NTU-3200-248
MODEL Enclosure type
= US, UN, TB = EU, CN, AU, UK, UN, TB
RATED POWER(Continuous) 3000W 3200W
OVER RATED POWER(3 Min.) 3500W 3680W
2 PEAK POWER(10 Sec.) 4500W 4800W
Socket type
2
SURGE POWER(30 Cycles) 6000W 6400W
TYPE-US TYPE-GFCI TYPE-UN TYPE-EU TYPE-CN TYPE-AU TYPE-UK TYPE-TB
Default setting set at 110VAC Default setting set at 230VAC
AC VOLTAGE In Stock By request In Stock In Stock In Stock By request By request In Stock
OUTPUT 100 / 110 / 115 / 120Vac selectable by DIP S.W 200 / 220 / 230 / 240Vac selectable by DIP S.W
Default setting set at 60±0.1Hz Default setting set at 50Hz±0.1Hz USA USA UNIVERSAL EUROPE CHINA AUSTRALIA U.K UNIVERSAL
FREQUENCY
50/60Hz selectable by DIP S.W 50/60Hz selectable by DIP S.W NTS-300
WAVEFORM Note.1 True sine wave (THD<3%)
AC REGULATION ±3.0% at rated input voltage NTS-450
FRONT PANEL LED Please refer to section 3.4 of installation manual
BAT. VOLTAGE 12V 24V 48V 12V 24V 48V NTS-750
VOLTAGE RANGE (Typ.) 10 ~ 16.5Vdc 20 ~ 33Vdc 40 ~ 66Vdc 10 ~ 16.5Vdc 20 ~ 33Vdc 40 ~ 66Vdc (Except for 48V input)
NTS/NTU-1200 NA NA NA NA NA NA
DC CURRENT (Typ.) 300A 150A 75A 320A 160A 80A 110Vac
NO LOAD
Default disable, auto detec AC output load ≦10W will be changed to saving mode NTS/NTU-1700
INPUT DISSPATION SAVING MODE
(Typ.) 15W NTS/NTU-2200
OFF MODE CURRENT DRAW ≦2mA
NA
EFFICIENCY (Typ.) Note.1 89% 90% 91% 90% 92% 93%
NTS/NTU-3200
BATTERY TYPES Lead Acid or li-ion
FUSE (INTERNAL) 40A*12 40A*6 25A*6 40A*12 40A*6 25A*6
NTS-300
ALARM 11±0.3Vdc 22±0.5Vdc 44±1Vdc 11±0.3Vdc 22±0.5Vdc 44±1Vdc
LOW SHUTDOWN 10±0.3Vdc 20±0.5Vdc 40±1Vdc 10±0.3Vdc 20±0.5Vdc 40±1Vdc
NTS-450
E13
DC INPUT
RESTART 12.5±0.3Vdc 25±0.5Vdc 50±1Vdc 12.5±0.3Vdc 25±0.5Vdc 50±1Vdc

ALARM 15.5±0.3Vdc 31±0.5Vdc 62±1Vdc 15.5±0.3Vdc 31±0.5Vdc 62±1Vdc NTS-750 NA
HIGH SHUTDOWN 16.5±0.3Vdc 33±0.5Vdc 66±1Vdc 16.5±0.3Vdc 33±0.5Vdc 66±1Vdc E13 E13 E13 E13
PROTECTION
RESTART 15±0.3Vdc 30±0.5Vdc 60±1Vdc 15±0.3Vdc 30±0.5Vdc 60±1Vdc NTS/NTU-1200

BAT. POLARITY By internal fuse open
NTS/NTU-1700
OVER TEMPERATURE Protection type : Shut down o/p voltage, re-power on to recover
OUTPUT SHORT
AC OUTPUT
Protection type : Shut down o/p voltage, re-power on to recover NA NA

220Vac
105 ~ 115% load for 180 sec., 115% ~ 150% load for 10 sec. (only for
OVER LOAD (Typ.) NTS-2200-248)
Protection type : Shut down o/p voltage, re-power on to recover NTS/NTU-2200
CIRCUIT BREAKER 30A 16A
TB TYPE UL458 (Only for “TB” AC socket) None
REMOTE CONNECTOR
Open : Normal work ; Short : Remote off
CONTROL
FUNCTION ACCESSORY Remote controller sold separately, Order No.: IRC1,IRC2,IRC3 E13
NTS/NTU-3200
AC INPUT RANGE 100/110/115/120Vac±16%, recover±13% 200/220/230/240Vac±16%, recover±13%
AC UPS FREQUENCY RANGE 45 ~ 65Hz
MODE
TRASFER TIME (Typ.) 10ms inverter AC by pass
WORK TEMP. -25 ~ +70℃(Refer to “Derating curve”)
ENVIRON- WORKING HUMIDITY 20 ~ 90% RH non-condensing PCB type

o
VIBRATION 10 ~ 500Hz, 3G 10min./1cycle, 60min. each along X, Y, Z axes NTS-250P

110Vac
MTBF 319.3K hrs min. Telcordia TR/SR-332 (Bellcore) ; 30.3K hrs min. MIL-HDBK-217F (25℃)
NTS-400P
PACKING 8.6Kg; 1pcs/ 10.4Kg/ 1.39CUFT NTS-250P
220Vac E13
NTS-400P
15 16
2.5 Derating curve 2.6 Mechanical specification
NTS-3200,NTU-3200 NTS-250P/400P
NTS-300,NTS-450,NTS-750,NTU-1200,NTS-1200,NTU-1700,NTS-2200,NTU-2200
2 NTS-1700 2
NTS-250P/400P F
D E
100
90
85
80
Screw size of M5 shall be used.(φ5 . 5) M3(φ3 . 5)
70
LOAD (%)
60
50
40
30
25 C A
20
Natural convection Force air with 25CFM
10 fan for NTS-250P/400P
0
-25 -20 -10 0 10 20 30 35 40 50 60 65 70 (HORIZONTAL)
AMBIENT TEMPERATURE (℃)

M3(φ3 . 5) M3(φ3 . 5)
others
100 B
80 NTS/NTU-1200,1700-12V
NTS/NTU-3200
LOAD (%)
50 NTS/NTU-1200-24,48V G
40 NTS/NTU-1700
20
10Vdc 10.5Vdc 11Vdc 16.5Vdc

20Vdc 21Vdc 33Vdc Model A B C D E F G
40Vdc 42Vdc 66Vdc NTS-250P 186 5.7 174.6 5.95 88.6 100.5 32
DC INPUT VOLTAGE NTS-400P 186 5.7 174.6 5.95 88.6 100.5 32

Unit : mm
17 18
NTS-300/450 / 750 NTS/NTU-1200/1700
E E
D D
2 2
ON
OFF DC INPUT
+ - G
Chassis
Bonding
F
Lug
F
Reverse Polarity Will Damage The Unit.
NTS-300
C A
ON
C A
OFF DC INPUT
+ - G
Chassis
Bonding
Lug
Reverse Polarity Will Damage The Unit.
NTS-450
B Reverse Polarity Will

Damage The Unit.
ON
B
OFF
DC INPUT
+ - G
Air flow Chassis
Bonding
Lug
direction
Air flow
direction
NTS-750
ON Reverse Polarity Will

Damage The Unit.
Model A B C D E F G OFF DC INPUT
- + G
NTS-300 210 45 120 119 130 7 55
Chassis
NTS-450 210 45 120 119 130 7 55 Bonding

Lug
NTS-750 270 45 180 147 158 7 67

Unit : mm Model A B C D E F G
NTS/NTU-1200 333 56.5 220 173 184 7 70
NTS/NTU-1700 400 62.5 275 173 184 7 70
Unit : mm
19 20
NTS/NTU-2200/3200 Accessories ( Optional )
MW ’ s Order No. Item Quantity
E
D
2 RJ11-RS232 1
2
27mm
1 Pull Handle 1
F 10mm 18 0m m
Carry Handle
2 Foot pad 4
3 Screw 2
C A
1 Pull Handle M4*2
Air flow Air flow

direction direction
2 Foot pad
Reverse Polarity Will
Damage The Unit.
DC INPUT
G
+ -
Model A B C D E F G
NTS/NTU-2200 400 TBD TBD 259 270 7.5 98
NTS/NTU-3200 440 TBD TBD 259 270 7.5 98
Unit : mm
21 22
Accessories ( Standard ) 3 . Installation & Wiring
Item Quantity
３.1 Precautions
The unit should be mounted on a flat surface or holding rack with
2 1 40.8 mm
1 suitable strength.
52 mm
In order to ensure the lifespan of the unit, you should refrain from
39.8 mm
operating the unit in environment of high dust or moisture.
NTS-450~3200/NTU-1200~3200 are design with built-in DC fan. 3
Please make sure the ventilation is not blocked. We recommend
2 1
that there should be no barriers within 15cm of the ventilating slits,
which is shown as follow.
3 4
>15cm Inverter >15cm
Air flow Air flow
Figure 3-1 set - up recommendation
３.2 System Block Diagram
M3*4
Cable should be as short as possible
Frame ground ( FG )
>15cm
Inverter Load
>15cm
battery
AC Input
Cable should be as short as possible ( for NTU series only )
Figure 3-2 System Block Diagram
23 24
3.3 Installation procedures ３.5 Battery selection
1 Please turn off the inverter first. Battery types：Lead acid or lithium ion batteries
2 Select proper cable for connection between battery and inverter by Voltage range：10 ~ 16 . 5Vdc (12V), 20~33Vdc (24V), 40~66Vdc (48V)
referring to section 3.4 Battery capacity：Please refer to the following table.
3 Connect the positive polarity of battery to the positive terminal of
Model / Output 112 212 124 224 148 248
inverter, and connect the negative polarity of battery to the
negative terminal of inverter. NTS-250P 85 Ah or above 45 Ah or above 25 Ah or above
3 3
NTS-300 1 00Ah or above 5 0Ah or above 3 0Ah or above
+ + + - NTS - 400P 15 0Ah or above 7 0Ah or above 35 Ah or above

Battery Inverter Battery Inverter
- - - + NTS- 45 0 17 0Ah or above 85 Ah or above 45 Ah or above
NTS- 75 0 25 0Ah or above 130 Ah or above 65 Ah or above

4 Turn the power switch to " ON " position , as soon as it shows green in
status ’ s LED, then it ’ s ready. NTS/NTU-1200 40 0Ah or above 200 Ah or above 100 Ah or above
3.4 Cable selection NTS/NTU-1700 50 0Ah or above 250 Ah or above 125 Ah or above
Wire connections should be as shor t as possible and less than 1.5 NTS/NTU-2200 735 Ah or above 370 Ah or above 185 Ah or above
meter is highly recommended. Make sure that suitable wires are
chosen based on safety requirement and rating of current. Small NTS/NTU-3200 1000 Ah or above 500 Ah or above 250 Ah or above
cross section will result in lower efficiency, less output power and
the wires may also become overheated and cause danger. Please
refer to table 3-1.
2
Rated current(A) Corss section(mm ) AWG
10A ~ 13A 1.25 16
13A ~ 16A 1.5 14
16A ~ 25A 2.5 12
25A ~ 32A 4 10
32A ~ 40A 6 8
40A ~ 63A 10 6
63A ~ 80A 16 4
80A ~ 100A 25 2
100A ~ 125A 35 1
125A ~ 160A 50 0
Table 3-1 Cable recommendiation
25 26
4 . User Interface NTS-1200 NTU-1200
4.1 AC panel C A D B C A D
A AC output socket : Please refer to Pg. 16 for varies socket for different
regions. P r
e Ci
r
cu
s
i t
B No fuse breaker with reset button (only for NTU-1200/1700/2200/
t o
Br
AC OUTPUT AC OUTPUT
e
R
a
ke
e
s e r
t
H H
3200 GFCI series ; NTU - 1200 / 1700 / 2200 / 3200 series) :
Under "bypass mode", when the AC output is shorted or the load
current exceeds the rated current of the No fuse breaker, the breaker E I E
will trip and that stops bypassing energy for the utility thus prevent
4 possible danger. When the abnormal condition is cleared, the user 4
can press down on the reset button to resume operation. NTS-1700 NTU-1700
C Ventilation slits: The inverter requires good ventilation for proper
C A D B C A D
operation and prolonging its lifetime.
D LED indicators : Indicate the status of inverter and the load condition. P r
e Ci
r
cu
s
i t
E Communication port: For remote monitoring purpose, the unit can
t o
Br
AC OUTPUT AC OUTPUT
e
R
a
ke
e
s e r
t
H H
be connected to a PC through this communication port by using the
I
or a cable and monitoring software. Also for remote control purpose,
the unit can be connected to the IRC module through this port. E E
F Power ON/OFF switch : The inverter will turn ON if the switch is in the
ON position, and vice versa.
G FG connection
NTS/NTU-2200/3200
H Remote ON/OFF : Inverter will turn on if the pins of RC connector is
F A C D
open. And, inverter will turn off if the pins are shorted.
I AC bypass socket : When AC mains is available, by connecting the AC
AC OUTPUT
mains to the AC socket, it will enable AC bypass function, which the

energy will provide to load from AC mains directly.
E
G
NTS-300/450 NTS-750
H
D A C D A C
Status
AC OUTPUT
AC OUTPUT
DC iuput Status
SW
Load DC iuput
Load
R.C SW
H E
R.C Remote port
27 28
4.2 DC input panel 4.3 LED Indicator
A POWER ON/OFF switch: The inverter will turn ON if the switch is in Status indicator :
the ON position, and vice versa. The LED is used to indicate the status of inverter, including inverter OK,
B Input terminals (+), (-)
remote on/off and power saving mode.
C Frame ground (FG)
D Ventilation slits: The inverter requires suitable ventilation to work Green Orange Red
properly. Please make sure there is good ventilation and the lifespan Status Remote off
Inverter OK Abnormal Status
of the inverter can preserved. Saving mode (See below table)
NTS-300 NTS-450 DC Input Indicator：

It is used to show the input status of inverter.
4 A D B A B D
Green light：
4
When input voltage is greater than 12.5V(12V)/25V(24V) 50V(48V).
ON ON
Orange light：
OFF DC INPUT OFF DC INPUT
- -
Chassis
Bonding
+
Chassis
Bonding
+
When input voltage is within 11V~12.5V(12V)/22V~25V(24V)/44V~50V(48V).
Lug Lug
C C Red light：
Reverse Polarity Will Damage The Unit. Reverse Polarity Will Damage The Unit.
When input voltage is lower than 11V(12V)/22V(24V)/44V(48V) or over it's

specification. It flashes and warning sound will be activated.
NTS-750 NTS/NTU-1200 Green Orange Red

12.5~15.5Vdc 11~12.5Vdc <11Vdc or >15.5Vdc
DC Input
A B D A B 25~31Vdc 22~25Vdc <22Vdc or >31Vdc
50~62Vdc 44~50Vdc <44Vdc or >62Vdc

Damage The Unit. ON Reverse Polarity Will
Damage The Unit.
ON
DC INPUT
OFF
OFF
DC INPUT
+ - - + Load Condition Indicator：
Chassis
Bonding
Lug
Itr represents the magnitude of output loads
C C Chassis
Bonding
Lug
Green light：When load is lesser than 40%.

Orange light：When load is between 40%~80%.
Red light：When load is greater than 80%.
Green Orange Red

NTS/NTU-1700 NTS/NTU-2200/3200 Load
<40% load 40~80% load >80% load
A B B
ON Reverse Polarity Will

Damage The Unit.
DC INPUT
OFF Damage The Unit.
- + DC INPUT
- +
C Chassis
Bonding
Lug
29 30
AC Input Indicator： 5 . Explanation of Operation
Represents the magnitude of AC main.
Green light： 5.1 Procedure of setting Operating Mode, Output Voltage,
When AC mains is connected and the voltage is present normally. Frequency, and Saving Mode
Flash in green light： 5.1.1 Output Voltage and Frequency Setting
When the mains is connected but the voltage exceeds ±10% of the rated Factory settings are either 110Vac/60Hz or 230Vac/50Hz, users are able to
voltage, the green light will start flashing for warning. adjust the voltage and frequency, through the DIP switch of position
1,2,3,4 on the AC panel.
Light off：
when the mains is disconnected or not connected, LED will be in off. SW
Green
4 AC Input
Utility OK
1234
AC OUTPUT
Utility error Status

SW
Utility disconnect DC iuput
Load
5
Light R.C R.C Remote port
Flash Type-US
Light off
AC Output Voltage、 Frequency、Power Saving Mode、Selectable by DIP SW
SW1 SW2 SW3 SW4
OFF OFF : 100Vac or 200Vac
ON : 50Hz ON : Power saving mode
OFF ON : 110Vac or 220Vac
ON OFF : 115Vac or 230Vac
OFF: 60Hz OFF: Non-power saving mode
ON ON : 120Vac or 240Vac
5.1.2 Power Saving Mode setting

When the inverter is in no load status, in order to reduce battery
energy consumption by inveter accidentally, Position 4 of DIP S.W.
on the panel of inverter, can be adjusted to the "ON" position.
When this mode is activated, if the load is less than 10W, the
inverter will turn off the output and enter the power saving mode
after 3 second. In the power saving mode, the inverter MCU will
periodically detect the output load status. When a load greater
than 25W is connected, the inverter will switch back to normal
mode and start output again. (Non-power saving mode is used as
factory setting)
5.1.3 Remote ON / OFF
R.C Switch
Open Normal work
Short Remote off
31 32
75
5.2 Function Difference 2.63 69.74
70.5
Funtion / model NTS-250P/400P NTS-300/450 NTS-750/1200/1700/2200/3200 NTU-1200/1700/2200/3200
25.25
R1
27.5
Support IRC
50.5
Green : ON
Orange : OFF R4 .5
Red : Abnormal 2-ψ4.5

55
Support RS-232 Orange Flash : Power Saving
2-R2 (M3)
Support UART Model No : IRC1

Inverter Remote Controller
PUSH
ON / OFF 4-R
8.2
69.7
UPS Function
Remote port
HOLE IN CHASSIS
Standard
21
5.3 IRC1/IRC2/IRC3 Remote Control Unit SOLAR CHARGE
Green : ON
Green : ON
Orange : OFF Orange : OFF
l IRC1/IRC2/IRC3 is the monitoring and control unit used for the

BATTERY AC BATTERY
LOAD Red : Abnormal CHARGE LOAD Red : Abnormal
Green : ON 100%
INVERTER 100% Orange Power
100%
INVERTER 100% Orange Power
: :
Orange : OFF Flash Saving Flash Saving
Red : Abnormal
BY PASS
inverter series. Orange Flash : Power Saving 0% 0%

AC IN
0% 0%
5 l IRC1/IRC2/IRC3 can decode the RS-232 signals sent by the inverter 5

Model No : IRC1 PUSH Model No : IRC2 PUSH Model No : IRC3 PUSH
ON / OFF ON / OFF ON / OFF
Inverter Remote Controller Inverter Remote Controller Inverter Remote Controller
series and display through digital meters.

Note: Part of the control signals will not function properly due to 5.4 RS-232/UART Protocol
different compliance of each model. RS-232/UART communication can be used between NTS/NTU series
products and external controller (Controller) or PC software. The
MODEL IRC1 IRC2 IRC3
internal data of a single NTS/NTU unit can be read through RS-232 or
DIGITAL METER ----- Display the battery level, output load level, and operating status of inverter unit
CONTROL OUTPUT
UART, but multiple units on a bus is not allowed.
OUTPUT Remote ON/OFF for inverter unit
LED INDICATOR Remote turn ON(Green) ; Remote turn Off(Orange) ; Abnormal (Red) ; Saving mode (Orange flash) The RS-232/UART parameters of NTS/NTU series are defined as
REMOTE ON/OFF CONTROL The controlled inverter unit can be turned ON/OFF on the remote control panel for IRC1 / IRC2 / IRC3 follows:
POWER SAVING CONTROL Power saving enable / disable activation
TS-700 / 1000 / 1500 / 3000 TS-700 / 1000 / 1500 / 3000 TN-1500 / 3000 Parameter Setting
FUNCTION TN-1500 / 3000 NTS-750 / 1200 / 1700 / 2200 / 3200 NTS-750 / 1200 / 1700 / 2200 / 3200
SUITABLE SERIES
NTS-750 / 1200 / 1700 / 2200 / 3200 NTU-1200 / 1700 / 2200 / 3200 NTU-1200 / 1700 / 2200 / 3200
Baud Rate 9600
NTU-1200 / 1700 / 2200 / 3200 Data Bits 8
WORKING TEMP. -20 ~ +50℃
Stop Bit 1
WORKING HUMIDITY 20 ~ 90% RH non-condensing
ENVIRONMENT
STORAGE TEMP., HUMIDITY -40 ~ +85℃, 10 ~ 95% RH non-condensing Parity None
VIBRATION 10 ~ 500Hz, 2G 10min./1cycle, 60min. each along X, Y, Z axes Flow Control None
EMC EMISSION Compliance to EN55032 class A, EN61000-3-2,3, FCC PART 15 class A
EMC
EMC IMMUNITY Compliance to EN61000-4-2,3,4,6,8 Definition of MEAN WELL RS-232 protocol:
DIMENSION (L*W*H) (Unit:mm) 186*100.5*32mm (L*W*H)
OTHER Command Code Type Command name
1. The remote control can not re-power on for inverter at abnormal status. Q R Status Inquiry
2. The ambient temperature derating of 3.5℃/1000m with fanless models and of 5℃/1000m with fan models for operating altitude higher than
NOTE 2000m(6500ft). C W Remote Control
※ Product Liability Disclaimer：For detailed information, please refer to https://www.meanwell.com/serviceDisclaimer.aspx
Write voltage / Frequency
V R/W
Write: Need to enable with“pU” command first
pU W Enable/disable setting mode (for command“V”)
I R INVERTER Information
W W Write Information into INVERTER EEPROM
33 34
Communication sequence 1 Reset the Checksum data to zero
Min. request period (Controller/PC to NTU/NTS): 500mSec。
2 The checksum data is the sum of all written data
Max. response time (NTU/NTS to Controller/PC): 15mSec。
Min. packet margin time (Controller/PC to NTU/NTS): 10mSec。 Sum = 56 + 31 + 31 + 30 +20 + 30 +35 + 30 = 19D
3 Checksum = 01 9D
Request period
(Controller/PC to NTS)
UART-RX The format of the V command is as follows:

(Controller/PC) V(0x56) 1(0x31) 1(0x31) 0(0x30) SP(0x20) 0(0x30) 5(0x35) 0(0x30) 0x019D CR(0x0D)
RX data RX data
Note：For details about the format of the V command, see the following
Response time Packet Margin time
UART-RX (NTS to Controller/ PC) (Controller/ PC to NTS) write / read format and definition description.
(NTS)
TX data
The Q command：Used to confirm the inverter status, the parameters can
The write format and reply format of communication protocol be output voltage, output load percent (Digital), battery voltage, battery
5 NTS/NTU communications are transmitted by using ASCALL codes. The
capacity, heat sink temperature, utility power voltage, output power 5
frequency, DC bus, output load percent（Analog）and etc.
end character of communication command is CR(0x0D), also CRLF (0x0D
0x0A) is the most common end character. Therefore, when decoding data,
pay attention to whether LF (0x0A) is included and clear it to avoid data Write format：
0 1
confusion. To improve transmission quality, some commands contain
Q(0x51) CR(0x0D)
Checksum.
The Checksum is calculated as follows: Reply format：

0 1~3 4 5~7 8 9~12 13 14~16
1 Reset the Checksum in the Checksum data to zero. ((0x28) O/P Voltage SP(0x20)
O/P load
SP(0x20)
Battery
SP(0x20)
Battery
(Digital) voltage capacity
2 Add all the data before Checksum data，Including V or I commands.
17 18~21 22 23~25 26 17~30 31 32~34
3 If the total data is less than 2 bytes, add 0 to make up 2 bytes. Heat Sink Utility Output DC BUS
SP(0x20) SP(0x20) SP(0x20) SP(0x20)
Temperature Power Volt. Power Freq. Voltage
35 36~38 39 40 41 42 43 44
For example, the V command sets the inverter output to 110VAC/50Hz. The SP(0x20) O/P Load SP(0x20) b0 b1 b2 b3 b4
(Analog)
format of the V instruction is as follows：
45 46 47 48 49 50 51 52
0 1-3 4 5-7 8-9 10
b5 b6 b7 b8 b9 b10 b11 b12
V(0x56) Voltage SP(0x20) Frequency Checksum CR(0x0D)
53 54 55 56 57 58 59 60
b13 b14 b15 b16 b17 b18 )（0x29） CR(0X0D)

Fill in the instructions in the above format and the instruction data except
checksum is as follows：
V(0x56) 1(0x31) 1(0x31) 0(0x30) SP(0x20) 0(0x30) 5(0x35) 0(0x30) checksum CR(0x0D)
35 36
Definition of command(Q) Data Funtion Description R/W Range Data type Uint
byte name
49 byte data flow (VVV QQQ SS.S BBB TT.T MMM RR.R DDD PPP
of command Q b0b1b2b3b4b5b6b7b8b9b10b11b12b13b14b15b16b17b18) Utility Utility
Data Funtion b3,1 Charger Charger R 1: Enable U1 ASCII
Description R/W Range Data type Uint Enable
byte name Enable
VVV,3 O/P Voltage O/P Voltage R 0~250Vac U1 ASCII Solar Solar

b4,1 Charger Charger R 1: Enable U1 ASCII
0% =000
O/P load O/P load 0< ~ ≦30% =025 Enable Enable
QQQ,3 percent percent R 31< ~ ≦50% =050 U1 ASCII Saving Saving
(Digital) (Digital) 51< ~ ≦75% =075 Mode Mode R 1: Saving Mode
b5,1 U1 ASCII
76< ~ % =100 Occurred Occurred
12: 0~17.0Vdc Battery Battery
Battery Battery
SS.S,4 R 24: 0~34.0Vdc U1 ASCII Exhausted Exhausted R 1: Battery low
voltage voltage b6,1 U1 ASCII
48: 0~68.0Vdc Mode Mode
5 5
0 ≦~ <25% =025 Shutdown Shutdown
Battery Battery 26<~ ≦50% =050 Mode Mode Shutdown Mode
BBB,3 capacity capacity R 51<~ ≦75% =075 U1 ASCII b7,1 R U1 ASCII
(Battery (Battery (Battery used up)
76<~ ≦100% =100 used up) used up)
Heat Sink Heat Sink Battery Battery
TT.T,4 R 0~99 . 9℃ U1 ASCII R 1: Battery OVP
Temperature Temperature b8,1 OVP OVP U1 ASCII
Utility Power Utility Power
MMM,3 Voltage R 0~250Vac U1 ASCII
Voltage Remote Remote
b9,1 R 1: Remote Shutdown U1 ASCII
Shutdown Shutdown
Output Power Output Power
RR.R,4 Frequency Frequency R 40.0~70.0 Hz U1 ASCII
OLP OLP
b10,1 R 1: Occurred OLP 100 % ~ U1 ASCII
DC BUS DC BUS 100 ~ 115 % 100 ~ 115 %
DDD,3 Voltage R 0V U1 ASCII
Voltage
OLP OLP
b11,1 R 1: Occurred OLP 115%~ U1 ASCII
O/P load O/P load 115 ~ 150 % 115 ~ 150 %
PPP,3 Percent Percent R 0~100% U1 ASCII OLP OLP
(Analog) (Analog) b12,1 R 1: Occurred OLP 150%~ U1 ASCII
150% ~ 150% ~
INVERTER INVERTER 1: Inverter OTP
b0,1 R 1: INVERTER Mode U1 ASCII OTP OTP R
Mode Mode b13,1 2: Fan lock protection U1 ASCII
Bypass Bypass b14,1 INV UVP INV UVP R 1: INV UVP protection U1 ASCII
b1,1 R 1: Bypass Mode U1 ASCII
Mode Mode
b15,1 INV OVP INV OVP R 1: INV OVP protection U1 ASCII
Utility Utility b16,1 INV Fault INV Fault R 1: INV Fault U1 ASCII
b2,1 Power Power R 1: Utility Power U1 ASCII
supply supply
37 38
Data Funtion Data Funtion
Description R/W Range Data type Uint Description R/W Range Data type Uint
byte name byte name
EEPROM EEPROM b7,1 Preserved Preserved Fixed”0x30” U1 ASCII

b17,1 error error R 1: EEPROM error U1 ASCII b8,1 Preserved Preserved Fixed”0x30” U1 ASCII
code code
b9,1 Preserved Preserved Fixed”0x30” U1 ASCII
System System
b18,1 R 1: Shutdown U1 ASCII b10,1 Preserved Preserved Fixed”0x30” U1 ASCII
Shutdown Shutdown
The C command: Used to remote control inverter.
Write format： b12,1 Preserved Preserved Fixed”0x30” U1 ASCII
Remote OFF b13,1 Preserved Preserved Fixed”0x30” U1 ASCII
0 1 2 3 4 5 6 6 8
C ( 0x43 ) 1 ( 31 ) 0 ( 30 ) 0 ( 30 ) 0 ( 30 ) 0 ( 30 ) 0 ( 30 ) 0 ( 30 ) 0 ( 30 )
9 10 11 12 13 14 15 16
0 ( 30 ) 0 ( 30 ) 0 ( 30 ) 0 ( 30 ) 0 ( 30 ) 0 ( 30 ) 0 ( 30 ) CR ( 0x0D ) The V command：Used to change output voltage and frequency.You need to
5 send the "pU" command to unlock it before executing the V command. 5
Remote ON
0 1 2 3 4 5 6 6 8
C ( 0x43 ) 0 ( 30 ) 1 ( 31 ) 0 ( 30 ) 0 ( 30 ) 0 ( 30 ) 0 ( 30 ) 0 ( 30 ) 0 ( 30 ) Write format：
9 10 11 12 13 14 15 16
0 1 2
0 ( 30 ) 0 ( 30 ) 0 ( 30 ) 0 ( 30 ) 0 ( 30 ) 0 ( 30 ) 0 ( 30 ) CR ( 0x0D )
pU(0x70 (After sending data, delay at least 20ms before
1 CR(0x0D)
0x55)
changing the voltage and current.)
Reply format：
0 0 1~3 4 5~7 89 10
C(0x43)
2 V(0x56) Voltage SP(0x20) Frequency Checksum CR(0x0D)
Definition of command ( C )
15 byte data flow Reply format：
( C b0b1b2b3b4b5b6b7b8b9b10b11b12b13b14)
of command C If the transmission parameters are correct, the inverter replies:
Data Funtion Description R/W Range Data type Uint 0 1~3 4 5~7 89 10
byte name
#(0x23) Voltage SP(0x20) Frequency Checksum CR(0x0D)
Shut Shut
b0,1 W 1: Remote Shutdown U1 ASCII
down down
If the transmission parameters are not correct, the inverter replies as follows,
Turn on Turn on
b1,1 W 1: Remote On INV U1 ASCII please confirm and retry.
INVERTER INVERTER
b2,1 Preserved Preserved Fixed”0x30” U1 ASCII 0 1 2 3 4 5 6 7 8
#(0x23) V(0x56) SP(0x20) C(0x43) M(0x4D) D(0x44) SP(0x20) E(0x43) R(0x52)
0 1 2 3 4
b4,1 Preserved Preserved Fixed”0x30” U1 ASCII R(0x52) O(0x4F) R(0x52)) Checksum CR(0x0D)

39 40
Definition of command(V) 86~95 96 97 98
8 byte data flow Date Checksum CR(0x0D)

( VWWW FFF )
of command V
Data Funtion Description R/W Range Data type Uint The W command: Used to modify inverter specifications. Such as alarm
byte name
voltage, shutdown voltage, serie number, model name and etc.
110 Series
100~127：100~127Vac
To set any Write format：
Voltage AC Voltage 220 Series 0 1 2 3 4~7 8 9~12 13
WWW,3 W/R U1 ASCII
setting within the 200~240：200~240Vac Voltage & Saving Equalization Floating
W(0x57) Model Code SP(0x20) SP(0x20)
range Freq. mode Volt. Volt.
000: Restore factory
voltage setting 14~17 18 19~22 23 24~27 28 29~38 39
(DIP switch setting mode) (Note) Shutdown Transfer Manufacture
Alarm Volt. SP(0x20) SP(0x20) SP(0x20) SP(0x20)
Volt. Volt. Country
050：50Hz
060：60Hz 40~58 59 60~68 69 70~82 83 84 85
Frequency Frequency
FFF,3 W/R 000：Restore factory U1 ASCII Serial Model Battery
5 setting setting frequency setting Number
SP(0x20) Revision SP(0x20)
Name
SP(0x20)
First Flag
SP(0x20)
5
(DIP switch setting mode) (Note)
86~95 96 97 98
2 Checksum Checksum Date Checksum CR(0x0D)
Note: After setting voltage or frequency by "V" command, disconnect Reply format：
communication,the product can still maintain the set value.If you want to If the transmission parameters are correct, the inverter replies:
switch back to DIP switch settings.Please send 0(0x30)0(0x30)0(0x30) for 0 1 2 3 4~7 8 9~12 13
voltage and frequency, and the new setting will take effect after restart. #(0x23)
Voltage & Saving
Model Code
Equalization
SP(0x20)
Floating
SP(0x20)
Freq. mode Volt. Volt.
The I command：Used to read inverter information. The parameters contain
14~17 18 19~22 23 24~27 28 29~38 39
the inverter out put voltage, frequency, model code, equalization voltage,
Shutdown Transfer Manufacture
floating voltage, alarm voltage, shutdown voltage and etc. Volt. Volt. Country
40~58 59 60~68 69 70~82 83 84 85

Write format： Serial Model Battery
0 1 SP(0x20) Revision SP(0x20) SP(0x20) SP(0x20)
Number Name First Flag
I(0x49) CR(0x0D)
86~95 96 97 98
Reply format： Date Checksum CR(0x0D)
0 1 2 3 4~7 8 9~12 13
Voltage & Saving Equalization Floating If the transmission parameters are not correct, the inverter replies as
#(0x23) Model Code SP(0x20) SP(0x20)
Freq. mode Volt. Volt.
follows, Please confirm and retry.
14~17 18 19~22 23 24~27 28 29~38 39 0 1 2 3 4 5 6 7 8
Shutdown Transfer Manufacture #(0x23) W(0x57) SP(0x20) C(0x43) M(0x4D) D(0x44) SP(0x20) E(0x43) R(0x52)
Volt. Volt. Country
0 1 2 3 4
40~58 59 60~68 69 70~82 83 84 85 R(0x52) O(0x4F) R(0x52)) Checksum CR(0x0D)
Serial Model Battery
SP(0x20) Revision SP(0x20) SP(0x20) SP(0x20)
Number Name First Flag
41 42
Definition of command(I、W)
Data Funtion Description R/W Range Data type Uint
byte name
87 byte data flow (I/W VDM EE.E FF.F AA.A SS.S TT.T MEANWELL LOC-
of command I、W xxxxxxxxxxxxxxx vv.v XXXXXXXXXXXXX B MM/DD/YYYY) 12: 9. 7 ~1 2 .0Vdc
Shutdown Shutdown
Data Funtion Description R/W Range Data type Uint SS.S,4 W/R 24: 1 9 . 4 ~ 24 .0Vdc U1 ASCII
byte name Volt. Volt. 48: 38.8~48.0Vdc
(Note 3)
100V(200V)/50Hz=00
110V(220V)/50Hz=01 12: 9.0~15.0Vdc
115V(230V)/50Hz=02 Transfer Transfer
TT.T,4 W/R 24: 18.0~30.0Vdc U1 ASCII
Voltage & Voltage & 120V(240V)/50Hz=03 Volt. Volt. 48: 36.0~60.0Vdc
V,1 R U1 Binary
Freq. setting Freq. setting 100V(200V)/60Hz=04 (Unsupported)(Note2)
110V(220V)/60Hz=05
115V(230V)/60Hz=06 Manufacture Manufacture MEANWELL
10 W/R U1 ASCII
120V(240V)/60Hz=07 Country Country ( Note4 )
(Defined by DIP SW)(Note1) Serial Serial LOC-xxxxxxxxxxxxxxxx
19 W/R U1 ASCII
5 Disable=00 Number Number (x: 0~9 ) 5
D,1 Saving mode Saving mode R Enable=01 U1 Binary REV:vv . v
(Defined by DIP SW)(Note1) R (Defined by Firmware,
9 Revision Revision U1 ASCII
6 112=00
n ot changeable)
124=01 Model Model Define by each model
13 W/R U1 ASCII
Model Model 148=02 Name Name (max of 14 digits)
M,1 R
Code Code 212=03 U1 Binary Battery Battery 0 = Disable
224=04
B,1 First First W/R 1= Enable U1 ASCII
248=05
(Defined by DIP SW)(Note1)
Flag Flag
Date :
10 Date Date W/R U1 ASCII
12: 9.0~15.0Vdc MM/DD/YYYY
Equalization Equalization
EE.E,4 W/R 24: 18.0~30.0Vdc U1 ASCII
Volt. Volt. 48: 36.0~60.0Vdc
(Unsupported)(Note2) 2 Checksum Checksum
12: 9.0~15.0Vdc
Floating Floating
FF.F,4 W/R 24: 18.0~30.0Vdc U1 ASCII
Volt. Volt. 48: 36.0~60.0Vdc
(Unsupported)(Note2)
12: 9. 9 ~1 2 . 5 Vdc
Alarm Alarm
AA.A,4 W/R 24: 1 9 . 8 ~ 25 . 0 Vdc U1 ASCII
Volt. Volt. 48: 39.6~50.0Vdc
(Note3)
43 44
T1 : After the user turns on the NTU-1200/1700/2200/3200, if it detects
1 The read value can be any arbitrary code, the BYTE length must be met
when writing data, and the value can be arbitrary. that the mains voltage is normal, the NTU will enter the bypass
mode,so the load will be supplied by the mains directly. While battery
2 If the related parameters are unsupported，please set the maximum voltage is in a fully charged status.
when writing :
12V: 15.0V (0x31 0x35 0x2E 0X30) T2 : If the AC mains fails or when the voltage of AC mains exceeds ±16% of
24V: 30.0V (0x33 0x30 0x2E 0x30) the setting, the NTU will immediately switch to inverter mode, to
48V: 60.0V (0x36 0x30 0x2E 0x30) ensure customer's equipment will not be affected. Take NTU-1200-
124(default 110Vac) as an example, when the voltage of AC mains is
3 The battery voltage setting must meet the following conditions:12.5V≥
greater then 127.6Vac or less than 92.4Vac, NTU-1200-124 will enter
Alarm_Volt.>Shutdown_Volt.≥9.7V . And Alarm_Volt. - Shutdown_Volt.≥0.2V .
the inverter mode to keep equipment running, and the energy is
If the above conditions are not met, the setting is invalid.
consumed from the battery.
4 If the data cannot fill the number of bytes set by the instruction ,please write
T3 : If the AC mains has returned to a range within +/-13% of the NTU's set
in blank code(0x20) after the write data. For example, the manufacturer
"MEANWELL" has 8 bits, and 2 bits need to be added. The ASCII code is: value, the NTU will switch to bypass mode again and supply power
5 M(0x4D) E(0x45) A(0x41) N(0x4E) W(0x57) E(0x45) L(0x4C) 0(0x20) 0(0x20)
from the mains to the load. In the meantime, the battery can be 5
charged through an external charger.
5.5 UPS Mode ( only for NTU series ) T4 : When the voltage of battery pack is consumed to the lower limit of the
5.5.1 Explanation of UPS mode inverter ’ s operating range, and the AC main still not valid. At this time,
the battery charger cannot provide energy any more, so the inverter
will keep operate until the battery voltage has consumed till the lower
ON ON
limit of the inverter's operating voltage. Eventually, inverter will
Utility shutdown.
Power OFF OFF
Power-On Re-power-on T5 : When the voltage of battery returned to operating range , inverter will
ON ON restart automatically.
By pass T6 : When the NTU-1700/2200/3200 series inverter works in bypass mode,

mode OFF OFF
t the inverter must be connected to the battery pack to start the fan to
ON ON ON
dissipate heat.
Inverter
Mode OFF OFF OFF 5.5.2 UPS System Block Diagram
t
Vboost
When NTU works in bypass mode, the charger can maintain the
Von
OFF Vfloat battery voltage and provide enough power when the AC mains is
Input Bat low abnormal. If the AC mains returns from abnormally, the charger can
voltage
or (Shut-down)
t also provide the power that lost when operating in inverter mode. For
battery
voltage T1 T2 T3 T4 T5 connection, please select wires or cable with a suitable wire diameter
according to the output current when connect the batter y and
inverter. Please refer to table 3-1 for connection.
45 46
Cable should as short as possible
Inverter Protection :
Over temperature protection(OTP) :
Frame ground ( FG )
When the temperature inside the inverter raise to a certain level, the
inverter will turn off for protection. After the temperate dropped back
>15cm
Inverter Load to operating range, re-power the inverter for operation.
>15cm
Battery 6.2 Failure Correction
AC Input Once failure condition occurs, the LED on panel of inverter will show
m
5c
( for NTU series only ) different LED light for indication. Fault condition can be separated into
>1
Charger 4 categories, AC output protection, DC input protection, over

temperature protection or other. Please refer to the following table for
(Suggest to work accompany with MEAN WELL NPB/NPP chargers)
fault indication and correction. If the fault condition cannot be solved,
6 . Protections and Failure Correction please contact MEAN WELL's distributor for further assistance.
6.1 Protection Funtion: fault signal Possible cause Suggestions for Fault correction
AC Output Protection : Check if the load requires high
star tup current, such as inductive
AC Output Over Load Protection :
Status Over load protection or capacitance loads. After the
When overloaded, the inverter is able to supply power for a period of time.
6 If the load does not drop back to the normal range,the OLP will be triggered DC Input
fault condition is remover, re- 6
power the inverter for operation.
and turn off the inverter. Once the OLP condition is removed, re-power on the Load
inverter to start operation again. Check if the load requirement
AC Output Short Circuit Protection : Short circuit protection exceed the rated value or if the
circuit is shorted.
When short-circuit occurs or the load increasing significantly, the inverter will
turn off for protection. After removing the fault condition, re-power on the Status Aged battery or malfunction Change a new battery
inverter to start operation. DC Input
Re check if the parameter of battery
Wrong battery capacitance
Load suits inverter's operating parameter
DC Input Protection :
Remove subject away from venthole
DC Polarity Protection : Status if any. If it's due to high ambient,
When connecting the DC polarity reversely, the internal fuse will blow for
please lower the temperate or load
protection. The unit then must return to MEAN WELL's distributor for further DC Input Over temperature protection
to proceed. After the fault condition
support. is remove, re-power inverter for
Load
Low DC Input Protection :
operation.
When DC input is lower than the operating range, inverter will turn off
automatically for protection. Status
Other fault condition that's Contact MEAN WELL's
Over Voltage of DC Input : DC Input
not defined distributor
Load
When the voltage of DC input over the operating range, the inverter will turn
off for protection. After the fault condition is removed, inverter will restart Note: Light
automatically. If the inver ter cannot operate normally af ter wards, it
represents that the inverter is damaged. Please return the unit to MEAN Flash
WELL's distributor if needed.
Light off
47 48
7 . Warranty
This product provide three years warranty under normal usage. Do not
replace parts or any form of modification to the product in order to keep
the warranty effectively.
※ MEAN WELL posses the right to adjust the content of

this manual. Please refer to the latest version of our
manual on our website. https://www.meanwell.com MEAN WELL WEB Inverter Manual
49 50
N o . 2 8 , W u q u a n 3 r d R d . , W u g u D i s t . , N e w Ta i p e i C i t y 2 4 8 , Ta i w a n

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NTS & NTU Series

True Sine Wave Inverter

1.Safety Guidelines 1 6 . Protections and Failure 47

2.2 Features 2 6.2 Failure Correction 48

2.3 Main specification 3 7.Warranty 49

différents ou de capacités différentes est strictement interdite! l Built-in Remote control

(avant et arrière) de l'onduleur. (Veuillez laisser au moins 15 cm d'espace) l CB/DEKRA/E13/EAC/UL/RCM/FCC/CE/UKCA certified.

n N'empilez aucun objet sur l'onduleur.

n N'allumez pas l'onduleur avant de démarrer le moteur si l'onduleur est

RESTART 12.5±0.3Vdc 25±0.5Vdc 50±1Vdc 12.5±0.3Vdc 25±0.5Vdc 50±1Vdc

RESTART 15±0.3Vdc 30±0.5Vdc 60±1Vdc 15±0.3Vdc 30±0.5Vdc 60±1Vdc NTS/NTU-1200

Protection type : Shut down o/p voltage, re-power on to recover NA NA

ENVIRON- WORKING HUMIDITY 20 ~ 90% RH non-condensing PCB type

VIBRATION 10 ~ 500Hz, 3G 10min./1cycle, 60min. each along X, Y, Z axes NTS-250P

AMBIENT TEMPERATURE (℃)

10Vdc 10.5Vdc 11Vdc 16.5Vdc

DC INPUT VOLTAGE NTS-400P 186 5.7 174.6 5.95 88.6 100.5 32

Reverse Polarity Will Damage The Unit.

B Reverse Polarity Will

ON Reverse Polarity Will

Model A B C D E F G OFF DC INPUT

NTS-450 210 45 120 119 130 7 55 Bonding

NTS-750 270 45 180 147 158 7 67

Air flow Air flow

>15cm Inverter >15cm

Air flow Air flow

Figure 3-1 set - up recommendation

３.2 System Block Diagram

Figure 3-2 System Block Diagram

+ + + - NTS - 400P 15 0Ah or above 7 0Ah or above 35 Ah or above

NTS- 75 0 25 0Ah or above 130 Ah or above 65 Ah or above

Table 3-1 Cable recommendiation

mains to the AC socket, it will enable AC bypass function, which the

NTS-300 NTS-450 DC Input Indicator：

When input voltage is lower than 11V(12V)/22V(24V)/44V(48V) or over it's

NTS-750 NTS/NTU-1200 Green Orange Red

Reverse Polarity Will

Green light：When load is lesser than 40%.

Green Orange Red

ON Reverse Polarity Will

Utility error Status

Utility disconnect DC iuput

5.1.2 Power Saving Mode setting

Funtion / model NTS-250P/400P NTS-300/450 NTS-750/1200/1700/2200/3200 NTU-1200/1700/2200/3200

Support UART    Model No : IRC1

l IRC1/IRC2/IRC3 is the monitoring and control unit used for the

inverter series. Orange Flash : Power Saving 0% 0%

5 l IRC1/IRC2/IRC3 can decode the RS-232 signals sent by the inverter 5

series and display through digital meters.

UART-RX The format of the V command is as follows:

The Checksum is calculated as follows: Reply format：

b13 b14 b15 b16 b17 b18 )（0x29） CR(0X0D)

VVV,3 O/P Voltage O/P Voltage R 0~250Vac U1 ASCII Solar Solar

EEPROM EEPROM b7,1 Preserved Preserved Fixed”0x30” U1 ASCII

b5,1 Preserved Preserved Fixed”0x30” U1 ASCII

8 byte data flow Date Checksum CR(0x0D)

2 Checksum Checksum Date Checksum CR(0x0D)

40~58 59 60~68 69 70~82 83 84 85

Support UART Model No : IRC1