Electronic
 
Pressure Switch
 

  EDS 300
 

User Manual
(Translation of original

instruction) Part No:. 669666 / Status: 19.11.2015 US

2 EDS 300

CONTENT
1  Technical Safety ............................................................................................ 4 
2  Exclusion of liability ....................................................................................... 4 
3  Functions of the EDS 300.............................................................................. 5 
4  Mounting ........................................................................................................ 5 
5  Operating keys on the membrane keypad .................................................... 6 
6  Digital display ................................................................................................ 6 
7  Output function .............................................................................................. 7 
7.1  SWITCHING OUTPUTS .....................................................................................7 
7.1.1  Switching point setting (SP) .............................................................................................. 7 
7.1.2  Window function setting (WIN) .......................................................................................... 7 
7.2  ANALOGUE OUTPUT ........................................................................................8 
7.3  SETTING THE SWITCHING POINTS, HYSTERESES AND/OR
SWITCHING VALUES FOR THE WINDOW FUNCTION ..................................8 
7.4  SETTING RANGES FOR SWITCHING OUTPUTS ............................................9 
8  Basic settings ................................................................................................ 9 
8.1  ALTERING THE BASIC SETTINGS ...................................................................9 
8.2  SUMMARY OF THE BASIC SETTINGS ...........................................................10 
9  Programming enables ................................................................................. 11 
9.1  ALTERING THE OPERATING PROGRAMMING ENABLE ..............................11 
9.2  ALTERING THE MAIN PROGRAMMING ENABLE ..........................................11 
10  Error messages ........................................................................................... 12 
11  Technical specifications............................................................................... 13 
12  Circuit diagram ............................................................................................ 14 
12.1  SUPPLY VOLTAGE, SWITCHING OUTPUTS, ANALOGUE OUTPUT ............14 
13  Model code .................................................................................................. 17 
14  Accessories ................................................................................................. 18 
14.1  FOR ELECTRICAL CONNECTION ..................................................................18 
14.2  FOR MECHANICAL CONNECTION .................................................................21 
15  Dimensions .................................................................................................. 22 

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EDS 300 3

Preface

This manual provides you, as user of our product, with key information on the
operation and maintenance of the equipment.

It allows you to get to know the product and to optimise your use of it for the
intended purpose.

This documentation must always be accessible at the installation site.

Please note: the specifications outlined in this documentation for the device
technology are correct at the time of publishing. Deviations are therefore possible
for technical specifications, figures and dimensions.

Should you discover errors when reading this document, or if you have any
suggestions or remarks, please let us know:

HYDAC ELECTRONIC GMBH

Technische Dokumentation
Hauptstraße 27
66128 Saarbrücken
-Germany-
Tel: +49(0)6897 / 509-01
Fax: +49(0)6897 / 509-1726
E-mail: electronic@hydac.com

The editorial team looks forward to hearing from you.

“Putting experience into practice”

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4 EDS 300

1 Technical Safety
The individual components of the EDS 300 Electronic Pressure Sensor and the assembled unit
are subject to strict quality assurance. Each EDS 300 undergoes a final test. This ensures that
when supplied the sensor is free of defects and complies with the designated specifications.

The series EDS 300 Electronic Pressure Sensors are maintenance-free and operate perfectly
when used under the conditions specified. If, however, you do encounter problems, please
contact your HYDAC representative. Any tampering with the sensor will invalidate all warranty
claims.

Compliance with European Standards

The EDS 300 series Electronic Pressure Sensors feature the mark and thus comply with all
the German approval requirements and the European standards currently applicable for operating
these units. As a consequence, compliance with the current regulations on electromagnetic
compatibility and the safety provisions of the Low-Voltage Directive is ensured.
This product complies with the provisions of the following European standards:
EN 61000–6–1 / 2 / 3 / 4
We reserve the right to make technical modifications.

General Safety Information

The EDS 300 series Electronic Pressure Sensor presents no safety risk provided it is used in
accordance with its proper, designated use. However, in order to avoid any risk to the operator or
any damage due to incorrect handling of the unit, please adhere strictly to the following safety
instructions:
• The EDS 300 must not be put into service if any known defects, either electrical or
mechanical, are apparent.
• The instructions for use must be strictly adhered to.
• Read the specifications on the rating plate.
• Troubleshooting and repair work may only be carried out by HYDAC’s Service Department.
• All relevant and generally recognized safety requirements must be adhered to.

2 Exclusion of liability
This operating manual was made to the best of our knowledge. Nevertheless and despite the
greatest care, it cannot be excluded that mistakes could have crept in. Therefore please
understand that in the absence of any provisions to the contrary hereinafter our warranty and
liability – for any legal reasons whatsoever – are excluded in respect of the information in this
operating manual. In particular, we shall not be liable for lost profit or other financial loss. This
exclusion of liability does not apply in cases of intent and gross negligence. Moreover, it does not
apply to defects which have been deceitfully concealed or whose absence has been guaranteed,
nor in cases of culpable harm to life, physical injury and damage to health. If we negligently breach
any material contractual obligation, our liability shall be limited to foreseeable damage. Claims due
to the Product Liability shall remain unaffected.

In the event of translation, only the original version of the operating manual in German is legally
valid.

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3 Functions of the EDS 300

Depending on the model, the unit offers the following functions:
• Display of the actual pressure, maximum value or a switching point.
• Switching the switching outputs according to the pressure and the pre-set switching
parameters.
• Analogue output
• Menu for basic settings (adapting the EDS 300 to the particular application)
• Two different types of programming enable

Four different output models are available:

• 1 switching output
• 2 switching outputs
• 1 switching output and 1 analogue output 4 .. 20 mA
• 2 switching outputs and 1 analogue output 4 .. 20 mA

4 Mounting
The EDS 300 can be mounted directly onto a hydraulic block via the pressure connection (7/16
SAE 4 female).

When used in critical applications (e.g. strong vibrations or knocks) the pressure connection must
be mechanically decoupled via a Minimess hose. Mounting clamps are available as an accessory
(see point 14.2 "Accessories - for mechanical connection").

The electrical connection should be carried out by a qualified electrician according to the relevant
regulations of the country concerned (VDE 0100 in Germany). The pressure switch housing must
be earthed properly at the same time. When fitted into a hydraulic block it is sufficient if the block
is earthed via the hydraulic system. In the case of minimess hose-mounting, the housing must be
earthed separately.

Additional assembly notes which, from experience, reduce the effect of electromagnetic
interference:
• Make line connections as short as possible.
• Use screened lines (e.g. LIYCY 4 x 0.5 mm²)
• The cable screening must be fitted by qualified personnel subject to the ambient conditions
and with the aim of suppressing interference.
• Direct proximity to connecting lines of user units or electrical or electronic units causing
interference must be avoided as far as possible.

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6 EDS 300

5 Operating keys on the membrane keypad

HYDAC EDS 300

4-digit
digital display

SP1 PSI SP2

mode keys for setting switching

points, switch-back points and
additional functions

6 Digital display
After switching on the supply voltage, the unit briefly displays "EdS" and then
displays the actual pressure.

2s

In the basic settings the display can be altered. For example, the maximum value can be
permanently displayed. This is the highest pressure which has been recorded since the unit was
switched on or was last re-set. A switching point can likewise be permanently displayed or the
display can be switched off. Depending on the setting, "TOP", "S.P.1", "S.P.2" or "OFF" appears
briefly on the display following the switch-on message.
The actual pressure can be displayed briefly by pressing the ▼ or the ▲ key. This causes the
maximum value to be re-set.

NOTE:
• If the actual pressure exceeds the nominal pressure of the unit, it can no longer be
displayed and the display begins to flash.
• If the actual pressure is below 1 % of the nominal range, then 0 is displayed.

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7 Output function

7.1 SWITCHING OUTPUTS

The EDS 300 has 1 or 2 switching outputs. The following settings can be made under the basic
setting:

7.1.1 Switching point setting (SP)

One switching point and one hysteresis can be set for each switching output. The relevant output
switches when the pre-set switching point is reached and switches back when the pressure falls
below the switch-back point. The switch-back point is determined by the pre-set hysteresis
(switch-back point = switching point minus hysteresis).

Abbreviations: "S.P.1", "S.P.2" = switching point 1 or 2

"H.Y.1", "H.Y.2" = hysteresis 1 or 2

7.1.2 Window function setting (WIN)

The window function enables a range to be monitored. For each switching output, in each case an
upper and a lower switching value can be input to determine the range.
The relevant output switches when the pressure enters this range. When leaving the range, i.e.
when the switch-back value has been reached, the output switches back. The lower switch-back
value is just below the lower switching value (lower switching value minus three times the
increment, see point 7.4). The upper switch-back value is just above the upper switching value
(upper switching value plus three times the increment, see point 7.4). The area between switching
and switch-back value forms a safety zone which prevents unwanted switching operations from
occurring (e.g. triggered by pulsations from a pump).
Example for switching output 1 (normally open function):
P

Abbreviations:
"hi.1", "hi.2" = High level 1 or 2 = upper switching value 1 or 2
"Lo.1", "Lo.2" = Low level 1 or 2 = lower switching value 1 or 2

NOTE:
• The window function only operates correctly (switching on and off), when all switching
values (including the safety zone) are greater than 0 bar and lower than the nominal
pressure range.

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8 EDS 300

7.2 ANALOGUE OUTPUT

Depending on the model, the EDS 300 has one analogue output with a 4 .. 20 mA signal.

7.3 SETTING THE SWITCHING POINTS, HYSTERESES AND/OR SWITCHING VALUES

FOR THE WINDOW FUNCTION
• Press "mode" key
• "S.P.1" or "hi.1" is displayed
• Keep pressing the "mode" key until the required parameter is displayed (depending on the
basic setting: "S.P.1", "h.Y.1", "S.P.2", "h.Y.2", "hi.1", "Lo.1", "hi.2" or "Lo.2").
• After 2 seconds the actual setting flashes.
• Use the ▼ or the ▲ keys to alter the setting.
• Use the "mode" key to call up other parameters, if required, and alter the setting using the ▼
and the ▲ keys.
• If no keys are pressed for 3 seconds, the display changes back and the settings are saved.

+
mode mode

pressure
display

press “mode” key display

2s
set switching point
* 3s

until the required =smaller value

parameter is =larger value
reached.

NOTE:
• If "LOC" appears in the display when trying to alter the settings, programming is
disabled (locked).
Action: set programming enable to "ON"
• (see point 9 "Programming enable")
• If the ▼ or the ▲ key is held down during alteration, the value automatically advances.
• If a setting has been altered, "PRG" appears briefly in the display when the display is
switched over. The new setting is then saved in the unit.

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EDS 300 9

7.4 SETTING RANGES FOR SWITCHING OUTPUTS

Switching point function
Measuring range Switching point Hysteresis and/or Increment *
and/or upper lower critical
critical value value
in psi in psi in psi in psi
-14 .. 75 -12.5 .. 75.0 -0.5 ..74.0 0.5
0 .. 150 3 .. 150 1 .. 148 1
0 .. 1000 15 .. 1000 5 .. 990 5
0 .. 3000 60 .. 3000 20 .. 2970 20
0 .. 6000 90 .. 6000 30 .. 5940 30
0 .. 9000 150 .. 9000 50 .. 8900 50

Window function
Measuring range Lower switch value Upper switch value Increment *
in psi in psi in psi in psi
-14 .. 75 -13 .. 74.5 -12.5 .. 75.0 0.5
0 .. 150 2 .. 149 3 .. 150 1
0 .. 1000 10 .. 995 15 .. 1000 5
0 .. 3000 40 .. 2980 60 .. 3000 20
0 .. 6000 60 .. 5970 90 .. 6000 30
0 .. 9000 100 .. 8950 150 .. 9000 50
*All ranges given in the table are adjustable by the increments shown.

8 Basic settings
In order to adapt the unit to a particular application, the function of the EDS 300 can be altered via
several basic settings. These are combined in one menu.

8.1 ALTERING THE BASIC SETTINGS

NOTE:
• When the menu is activated no switching operations are carried out.
• Switch off supply voltage or disconnect the unit from the supply voltage.

(for summary see 8.2)

To close the basic setting menu:

Call up the menu point "END", set to "YES", the EDS 300 returns to the normal display mode after
2 seconds.

NOTE:
• If after about 50 seconds no keys have been pressed, the menu automatically closes
down. Any changes which may have been made will not be saved

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10 EDS 300

8.2 SUMMARY OF THE BASIC SETTINGS

Setting Display Setting range Presetting
Switching mode switching output 1 (Sm 1) SP/ Win SP
Switching output 1 is operating in
switching point / hysteresis function
Switching output 1 is operating in
window function
Switching direction switching output 1 (S 1) ON/OFF ON
"ON ": normally open function.
"OFF ": normally closed function.
Switch-on delay switching output 1 0.00..75s 0
(Ton 1)
Time in seconds which must elapse, once the
particular switching point has been reached or
exceeded, before switching will occur.
Switch-off delay switching output 1 0.00..75s 0
(Toff 1)
Time in seconds which must elapse,
once the pressure has fallen below the
particular switch-back point, before
switching will occur.
Switching output 2, see above
Primary display (Primary) ACT / Top / ACT
Display value which should remain S.P.1 / S.P.1 /
permanently displayed: OFF
"ACT .": actual pressure
"Top": pressure peak value
"S.P.1" or "S.P.2": switching point 1 or 2
"OFF ": display off
(for function, see point 6 "Digital display")
Calibration of sensor zero point (Calibrate) YES / NO NO
"YES":
The base pressure is saved as the new zero
point. This is possible in the range +/- 3 % of the
unit’s nominal pressure range. "new" appears in
the display when a calibration is carried out in the
permissible range, otherwise "Err" is displayed.

This function is useful for example if there

is always a residual pressure in the system
which should however be displayed as 0 bar.

Important:
• Following a zero point adjustment, for example, on a 9000 psi unit, a pressure of up
to 270 psi is displayed as 0 psi. Before any work is carried out on the hydraulic
system, ensure that the system is de-pressurised. (for reference only)
Version number (Version)
Display of the current software
version. (for reference only)
To close basic settings (End) YES / NO NO

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EDS 300 11

9 Programming enables
The unit has 2 types of programming enable which must both be set to "ON " to change the
settings. The operating programming enable can be set or cancelled during operation. It provides
protection against inadvertent changes to the unit's settings.
A programming disable via the main programming enable has the effect that no change to the
settings can be carried out during operation. This serves, for example, as a safety function or as
protection against unauthorised alterations.

9.1 ALTERING THE OPERATING PROGRAMMING ENABLE

mode mode
pressure
display

* * 3s
* 3s

press both display use or to alter setting,

arrow keys (release ON = programming possible
simultaneously arrow keys) OFF = programming disabled
and hold down
for 3 s

9.2 ALTERING THE MAIN PROGRAMMING ENABLE

Switch off supply voltage or disconnect the unit from the supply voltage.
"main program state"
mode mode
pressure
display

* * *
3s
3s

press both arrow display use or to alter setting,

arrow keys (release ON = programming possible
simultaneously arrow keys) OFF = programming disabled
and hold down.
Switch on supply
voltage (hold keys
down for 3 s)

Note:
• If a setting has been changed "PRG" is displayed briefly when the display is switched
over. The new setting is then saved in the unit.

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12 EDS 300

10 Error messages
If an error is detected, then a corresponding error message appears which must be acknowledged
by pressing any key. Possible error messages are as follows:

E.01 The switching points and hystereses have been set in such a way that the resulting
switch-back point is no longer within the permissible setting range.

Example:
Switching point is set to 180 bar, the hysteresis to 200 bar.

The setting is not correct since the resulting switch-back point is smaller than the
switching point: the error message is displayed.

Action: Correct the settings.

E.10 A data error has been detected in the saved settings. Possible causes are strong
electromagnetic interference or a component fault.

Action: Check all the settings (programming enables, switching points, switch-back points
and basic settings) and correct these if necessary. If the errors occur frequently,
please contact Hydac Service.

E.12 An error has been detected in the stored calibration data. Possible causes are strong
electromagnetic interference or a component fault.

Action: Disconnect the unit from the supply voltage and then re-connect. If the error
message is still displayed, the unit must be returned to the manufacturer for re-
calibration or repair.

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EDS 300 13

11 Technical specifications
Input data
Measuring ranges - psi -14.5 .. 75 | 150 | 1000 | 3000 | 6000 | 9000
Overload pressures - psi 290 | 290 | 2900 | 7250 | 11600 | 14500
Burst pressure - psi 1450 | 1450 | 7250 | 14500 | 29000 | 29000
Mechanical connection SAE-4 female thread (7/16-20 UNF2B)
Torque value 11 lb-ft (15 Nm)
Parts in contact with medium Mech. connection: Stainless steel
Seal: FPM
Output data
Accuracy to DIN 16086, ≤ ± 0.5 % FS typ.
Max. setting ≤ ± 1 % FS max.
(display, analogue output)
Repeatability ≤ ± 0.5 % FS max.
Temperature drift zero point max. ≤ ± 0.017 % FS / °F (≤ ± 0.03 % FS / °C)
range max. ≤ ± 0.017 % FS / °F (≤ ± 0.03 % FS / °C)
Analogue output (optional)
Signal 4 .. 20 mA load resistance ≤ 400 Ω
Switching outputs
Type PNP transistor output
Switching current max. 1.2 A per switch output
Switching cycles > 100 million
Reaction time approx. 10 ms
Environmental conditions
Compensated temperature range 14 .. 158 °F (-10 .. +70 °C)
Operating temperature range -13 .. 176 °F (-25 .. +80 °C)
Storage temperature range -40 .. 176 °F (-40 .. +80 °C)
Fluid temperature range -13 .. 176 °F (-25 .. +80 °C)
-mark EN 61000-6-1 / 2 / 3 / 4
Vibration resistance to ≤ 10 g
DIN EN 60068-2-6 at 10 .. 500 Hz
Shock resistance to ≤ 50 g
DIN EN 60068-2-29 (11ms)
Protection class to IEC 60529 IP 65
Other data
Supply voltage 20 .. 32 V DC
Current consumption approx. 100 mA (inactive switch output)
Display 4-digit, LED, 7 segment, red,
height of digits 9.2 mm
Weight ̴ 300 g
Note: Reverse polarity protection of the supply voltage, excess voltage,
override, short circuit protection are provided.
FS (Full Scale) = relative to the complete measuring range

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14 EDS 300

12 Circuit diagram

12.1 SUPPLY VOLTAGE, SWITCHING OUTPUTS, ANALOGUE OUTPUT

Model with 1 switching output

Male EN 175301-803 (DIN 43650),

3 pole + PE
1 2

EDS 355-1
Pin
1 + UB
2 0V
3 SP 1
Housing

Male M12x1, 4 pole

EDS 356-1
Pin
1 + UB
2 n.c.
3 0V
4 SP 1

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EDS 300 15

Model with 2 switching outputs

Male 4 pole Binder series 714 M18

2 3

1 4

EDS 354-2
Pin
1 + UB
2 0V
3 SP 1
4 SP 2

Male M12x1, 4 pole

Pin
EDS 356-2
1 + UB
2 SP 2
3 0V
4 SP 1

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16 EDS 300

Model with 1 switching output and 1 analogue output

Male 4 pole Binder series 714 M18

2 3

EDS 354-3 1 4

Pin
1 + UB
2 0V
3 SP 1
4 Analogue

Male M12x1, 4 pole

EDS 356-3
Pin
1 + UB
2 Analogue
3 0V
4 SP 1

Model with 2 switching outputs and 1 analogue output

Male M12x1, 5 pole

EDS 358-5
Pin
1 + UB
2 Analogue
3 0V
4 SP 1
5 SP 2

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EDS 300 17

13 Model code EDS 3 4 8 - 5 - 250 - 000

EDS 3 5 X - X - XXX - 000

Series-no.
(determined by manufacturer)
Mechanical connection
5 = SAE-4 female thread (7/16-20 UNF2B)
Anschlussart, elektrisch
4 = Male 4 pole Binder series 714 M18
only possible on output models "2" and "3"
(connector not supplied)
5 = Male 3 pole + PE, EN175301-803 (DIN 43650)
only possible on output model "1"
(connector ZBE 01supplied)
6 = Male M12x1, 4 pole
only possible on output models "1", "2" and "3"
(connector not supplied)
8 = Male M12x1, 5pole
only possible on output model " 5 "
(connector not supplied)
Output
1 = 1 switching output
only in conjunction with electrical connection type "5" oder "6"
2 = 2 switching outputs
only in conjunction with electrical connection type "4" or "6"
3 = 1 switching output and 1 analogue output
only in conjunction with electrical connection type "4" or "6"
5 = 2 switching outputs and 1 analogue output
only in conjunction with electrical connection type Anschlussart "8"
Pressure ranges
0089 (-14..75); 0150; 1000; 3000; 6000; 9000 psi
Modification number
400 = Standard in psi
401 = Vacuum in psi
(determined by manufacturer)

Notes:
Special models on request.
For instruments with a different modification number, please read the label or the technical amendment
details supplied with the instrument.

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18 EDS 300

14 Accessories

14.1 FOR ELECTRICAL CONNECTION

ZBE 01
Female connector
EN175301-803 (DIN 43650)
3 pole + PE, right-angle
Cable diameter:
4.5 .. 7 mm
Part No.: 905701

ZBE 02
Female connector
Binder Serie 714 M18
4 pole, straight
Cable diameter:
6.5 .. 8 mm
Part No.: 609479

ZBE 03
Female connector
Binder Series 714 M18
4 pole, right-angle
Cable diameter:
6.5 .. 8 mm
Part No.: 609480

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EDS 300 19

ZBE 06 (4 pole)
Female connector M12x1,
right-angle
Cable diameter:
2.5 .. 6.5 mm
Part No.: 6006788

ZBE 06-02 (4 pole)

Female connector M12x1,
right-angle with 2 m cable
Part No.: 6006790
ZBE 06-05 (4pole),
Female connector M12x1,
right-angle with 5 m cable
Part No.: 6006789

Colour code: Pin 1: brown

Pin 2: white
Pin 3: blue
Pin 4: black

ZBE 06S-03 (4 pole)

Female connector M12x1,
straight, with 3 m cable,
shielded
Part No.: 6098243
ZBE 06S-05 (4 pole),
Female connector M12x1,
straight, with 5 m cable,
shielded
Part No.: 6143284

ZBE 06S-05 (4 pole),

Female connector M12x1,
right-angle
with 5 m cable, shielded
Part No.: 6044891

Colour code: Pin 1: brown

Pin 2: white
Pin 3: blue
Pin 4: black

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20 EDS 300

ZBE 08 (5 pole)
Female connector M12x1,
right-angle
Cable diameter:
2.5 .. 6.5 mm
Part No.: 6006786

ZBE 08-02 (5 pole)

Female connector M12x1,
right-angle with 2 m cable
Part No.: 6006792
ZBE 08-05 (5 pole),
Female connector M12x1,
right-angle with 5 m cable
Part No.: 6006791

Colour code: Pin 1: brown

Pin 2: white
Pin 3: blue
Pin 4: black
Pin 5: grey

ZBE 08S-02 (5 pole),

Female connector
M12x1, right-angle, with
2 m cable, shielded
Part No.: 6019455
ZBE 08S-05 (5 pole),
Female connector
M12x1, right-angle, with
5 m cable, shielded
Part No.: 6019456
ZBE 08S-10 (5 pole),
Female connector
M12x1, right-angle,
with 10 m cable,
shielded
Part No.: 6023102

Colour code: Pin 1: brown

Pin 2: white
Pin 3: blue
Pin 4: black
Pin 5: grey

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14.2 FOR MECHANICAL CONNECTION

ZBM 300 clamp for wall-mounting the EDS 300 (material: polypropylene)

Mounting:
• Glue damping strips into the
recesses of the base plate.
• Mount base plate, the top is
indicated by "OBEN ", "TOP "
and
2 arrows.
• Insert EDS 300.
• Fit clip (only one possible position)
and press hard on the cross-
pieces
until they engage.

ZBM 310 clamp for wall-mounting the EDS 300

material: polypropylene, aluminium AlSi12, steel)

Mounting:
• Weld on the steel base plate
• Mount EDS 300 according to
the illustration

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22 EDS 300

15 Dimensions

  Male electrical
connection Binder
series 714-4p

seal

   
Male electrical connection
4p / 5p

HYDAC Technology Corporation

Electronic Division
2260 City Line Road
USA-Bethlehem, PA 18017

Phone.: (610) 266-0100

Fax: (610) 266-3540
E-mail: powerup@hydacusa.com

Status: 19.11.2015 HYDAC ELECTRONIC GMBH Part No.: 669666 US