GB 4 Dispenser Interface Converter Technical Guide

GB interface converter
2-wire active current loop interface converter

(RS-485/RS-232 to 2-wire current loop and backwards)
TECHNICAL GUIDE
(PCB board modification: GB-4)
Review date: 21 March, 2020

GB INTERFACE CONVERTER TECHNICAL GUIDE
Revision: 1.07 Review date: 21 March, 2020
CONTENT
REVISION HISTORY ................................................................................................................................................ 3
PURPOSE OF THE DOCUMENT .............................................................................................................................. 4
TECHNICAL FEATURES ........................................................................................................................................... 5
TECHNICAL SPECIFICATIONS ................................................................................................................................. 6
COMPLETE SET ...................................................................................................................................................... 7
PCB BOARD CONNECTORS OVERVIEW ................................................................................................................. 8
CONNECTION SCHEME TO PTS CONTROLLER ....................................................................................................... 9
CONNECTION SCHEME TO PC COM-PORT (DATA COMMUNICATION)...............................................................11
FIRMWARE UPDATE ............................................................................................................................................12
INSTALLATION REQUIREMENTS FOR PETROL STATION ......................................................................................14
EXAMPLES OF FUEL DISPENSERS CONNECTION SCHEMES .................................................................................16
Gilbarco dispenser connection scheme....................................................................................................... 16
Wayne Dresser dispenser connection scheme (current loop interface) ..................................................... 19
Bennett dispenser connection scheme (2-wire current loop interface) ..................................................... 20
Batchen Email dispenser connection scheme ............................................................................................. 21
Petrotec dispenser connection scheme ...................................................................................................... 22
Galileo dispenser connection scheme ......................................................................................................... 23
Prowalco dispenser connection scheme ..................................................................................................... 24
Petposan-S4 / Meksan-S4 / Europump-S4 dispensers connection scheme ................................................ 25
Yenen dispensers connection scheme ........................................................................................................ 26
Petposan-Beta / Europump-Beta dispensers connection scheme .............................................................. 27
EuroPump dispenser connection scheme ................................................................................................... 28
Mekser dispenser connection scheme ........................................................................................................ 29
Fuelsis dispenser connection scheme ......................................................................................................... 30
Falcon dispenser connection scheme.......................................................................................................... 31
ORDER INFORMATION ........................................................................................................................................32
www.technotrade.ua page 2 from 32

REVISION HISTORY
REV DATE BY SECTION DESCRIPTION

1.07 2020.03.21 Evgeniy All Regular document review
Vasyliev
1.06 2019.07.07 Evgeniy All GB-4 board release
Vasyliev
1.05 2017.01.20 Evgeniy Firmware update procedure Firmware update procedure using 4th DIP-switch
Vasyliev SA1
1.04 2014.10.22 Evgeniy Installation requirements for petrol station Requirements to power supply, requirements to
Vasyliev grounding, requirements to laying of cable
communications
1.03 2014.08.01 Evgeniy Firmware update procedure Description on how to update converter firmware
Vasyliev Position of DIP-switch SA1 specified
1.02 2013.11.30 Evgeniy Connection schemes Position of DIP-switch SA1 specified
Vasyliev
1.01 2013.01.11 Evgeniy All First release
Vasyliev

PURPOSE OF THE DOCUMENT

This Technical Guide is intended for studying of GB interface converter for fuel dispensers for petrol
stations. It contains basic information regarding its
− technical characteristics
− board interfaces and connectors
− configuration
− schemes of connection to fuel dispensers
− cabling
Information regarding connection to specific fuel dispensers and correspondent configuration of GB
interface converter can be received upon request to Technotrade LLC company.
During the system development process given Technical Guide is also expanded and updated and new
chapters are added. Latest version of this Technical Guide can be downloaded from the GB interface
converter web-page: http://www.technotrade.ua/gilbarco-interface-converter.html.
Technotrade LLC hereby permits reproduction of this document as may be required by any of the
customers or OEMs wishing to use it.
This document has been carefully prepared and is believed to be accurate. However, Technotrade LLC, its
employees and its agents do not assume responsibility for its use either directly or indirectly. Technotrade
LLC shall not be liable for technical or editorial errors or omissions which may appear in this document.
Technotrade LLC reserves a right to make changes to this document at any time without notice. Prospective
users of this document should contact Technotrade LLC at the time they wish to use GB interface converter
together with their products to become aware of any updates that may apply.
In case if you find any mistakes, omissions in this document or have any suggestions on improvements to
this document, please feel free to e-mail them to our support mailbox: support_1a@technotrade.ua. We
will be grateful to you for this valuable information.
All technical questions regarding the GB interface converter are welcome to be asked on support mailbox:
support_1a@technotrade.ua. Our support team will be glad to help you.
Also, you can call to us or visit us on:
Technotrade LLC
Ukraine, 04114 Kiev, Priorska str. 10, office 1
Tel: +38-044-502-46-55, +38-044-502-46-77
Web: www.technotrade.ua
Mail: mail@technotrade.ua

TECHNICAL FEATURES
GB interface converter (RS-485/RS-232 interface to 2-wire optically isolated active current loop interface
and backwards) is intended for communication with fuel dispensers, which use 2-wire current loop
interface, through interfaces:
− RS-232
− RS-485 (2-wire)
GB interface converter can be applied for communication with following brands of fuel dispensers, which
use 2-wire current loop for communication with control systems:
− AG Walker
− ANGI International
− Baransay
− Batchen
− Bennett
− CFT Clean Fuel
− COMPAC
− EuroPump
− Falcon
− Fuelsis
− Galileo
− Gilbarco
− Greenfield
− Kalvacha
− Kraus
− Maser
− Meksan
− Mekser
− PEC (Gallagher Fuel Systems)
− Petposan
− Petrotec
− Prowalco
− Salzkotten
− Tankanlagen Salzkotten
− Wayne Dresser (USCL communication protocol)
− Yenen
− others

TECHNICAL SPECIFICATIONS
Specification
PARAMETER VALUE
Power supply voltage 12 V DC
Current consumption 300 mA max
Temperature range From -40°C to +80°C
Weight 45 g
Dimensions 85 x58 x 25 mm
Technical characteristics
PARAMETER VALUE
Current value in current loop Adjustable using DIP-switches, located on PCB board, selected
interface values: 20 mA, 40 mA, 60 mA
Isolation in current loop interface Optical isolation
Current loop generator Сurrent generator
Communication ports
PORT NAME INTERFACE PURPOSE
RS-232
RS-232 Communication with a control system (POS
DATA (3 wires: TxD, RxD, Gnd)
terminal, cash register, OPT). Selection of
PORTS RS-485
RS-485 interface is made using DIP-switch.
(2-wires: line A, line B)
Pump ports Connection with fuel dispensers using 2 wires.
1…4 One dispenser is to be connected to each of
PUMP Optically isolated active
the pump ports. Selection of current value in
PORTS (2-wire current current loop
current loop of pump ports is made using DIP-
loop) switches.
PROGRAM RS-232
RS-232 Update of the interface converter firmware
PORT (3 wires: TxD, RxD, Gnd)

COMPLETE SET
Depending on the order code (see section “Order information”) GB interface can be supplied either in a
view of electrical board (variant of converter supply GB4-PCB-z), or installed in a mounting box with cables
inputs and a power switching button (variant of converter supply GB4-BOX-z).
Variant of GB-4 interface converter supply in a view of electrical board (GB4-PCB-z)
Variant of GB-4 interface converter supply installed in a plastic box with cables inputs and
power switching button (GB4-BOX-z)

PCB BOARD CONNECTORS OVERVIEW
NOTE!
Configuration DIP-switch SA2 serves for selection of interface converter operation mode:
- switch 1 should be set in position “ON”
- switch 2 should be set in position “OFF”
DIP-switch SA1 serves for selection of communication interface:

- RS-232
- RS-485 (2-wire)
DIP-switches SA3, SA4, SA5, SA6 in each of the pump ports serve for selection of current value in current
loop of each pump port and are adjusted in accordance with an image located on PCB board, which
indicates current value in pump ports in accordance with set DIP-switch positions. Possible current values:
- switch 1 OFF, switch 2 OFF => 20 mA
- switch 1 ON, switch 2 OFF => 40 mA
- switch 1 OFF, switch 2 ON => 40 mA
- switch 1 ON, switch 2 ON => 60 mA

CONNECTION SCHEME TO PTS CONTROLLER
Connection scheme to PTS-1 controller (information about PTS controller over fuel dispensers and ATG
systems can be found on PTS-1 controller web-page: http://www.technotrade.ua/fuel-pump-
controller.html):
Connection scheme to PTS-2 controller (information about PTS controller over fuel dispensers and ATG
systems can be found on PTS-2 controller web-page: http://www.technotrade.ua/pts2-forecourt-
controller.html):

At connection using RS-485 interface please check the following:
✓ DIP-switch SA2:
o switch 1 should be set to position “ON”
o switch 2 should be set to position “OFF”
✓ DIP-switch SA1 should be in position “RS-485”
✓ LED HL1 “WORK” indicates normal operation of firmware, toggling its state once per second
✓ LED HL3 indicates presence of 12 V DC on the board, should be constantly shining
✓ Green and red LEDs “Tx” and “Rx”, which indicate communication exchange in DATA PORT, should be
blinking, which indicates communication with the PTS controller over RS-485 interface:
- in case if both LEDs “Rx” and “Tx” are not blinking – there are no requests from the control system
and no responses from the dispenser.
- in case if LED “Rx” is blinking and LED “Tx” is not blinking – there are requests from the control
system (LED “Rx” is blinking), but there are no responses from the dispenser.
- in case if LED “Rx” is blinking and LED “Tx” is blinking – there are requests from the control system
(LED “Rx” is blinking) and there are responses from the dispenser (LED “Tx” is blinking).
✓ LEDs on pump ports, where the dispenser is connected, should be constantly shining at closing of the
current loop interface
✓ DIP-switches on pump ports (SA3, SA4, SA5, SA6), where dispenser is connected, should be set in
accordance with a current value in current loop. Possible current values:

CONNECTION SCHEME TO PC COM-PORT (DATA COMMUNICATION)
Control over dispensers through the interface converter from a personal computer:
connection to dispensers
COM-port
+ -+ -
TxD
Pump ports for

RxD
GND
+ -+ -
Personal computer
GB interface converter
At connection using RS-232 interface please check the following:
✓ DIP-switch SA2:
o switch 1 should be set to position “ON”
✓ DIP-switch SA1 should be in position “RS-232”
✓ LED HL1 “WORK” indicates normal operation of firmware, toggling its state once per second
✓ LED HL3 indicates presence of 12 V DC on the board, should be constantly shining
✓ Green and red LEDs “Tx” and “Rx”, which indicate communication exchange in DATA PORT, should be
blinking, which indicates communication with the PTS controller over RS-232 interface:
- in case if both LEDs “Rx” and “Tx” are not blinking – there are no requests from the control system
and no responses from the dispenser.
- in case if LED “Rx” is blinking and LED “Tx” is not blinking – there are requests from the control
system (LED “Rx” is blinking), but there are no responses from the dispenser.
- in case if LED “Rx” is blinking and LED “Tx” is blinking – there are requests from the control system
(LED “Rx” is blinking) and there are responses from the dispenser (LED “Tx” is blinking).
✓ LEDs on pump ports, where the dispenser is connected, should be constantly shining at closing of the
current loop interface
✓ DIP-switches on pump ports (SA3, SA4, SA5, SA6), where dispenser is connected, should be set in
accordance with a current value in current loop. Possible current values:

FIRMWARE UPDATE
GB interface converter’s firmware is constantly being improved and new versions of firmware with
improved functionality, new possibilities and fixed bugs of the previous firmware versions are proposed to
be applied. Latest version of interface converter firmware is always available for downloading for
customers.
Update of the interface converter firmware is made through a COM-port of personal computer using a
built-in updater in Pts_config.exe utility. Please read more about the Pts_config.exe utility in PTS controller
technical guide, which can be downloaded from PTS controller web-page
http://www.technotrade.ua/fuel_pump_controller.html.
Scheme of connections of the GB interface converter to personal computer:
Gnd POWER
12 V DC
SUPPLY
Pts_config utility
TxD
RxD
Gnd
4th switch of
COM-port configuration DIP-
switch SA2
Personal computer GB interface converter set to position ON
Before start of firmware update it is necessary to 4th switch of configuration DIP-switch SA2 on GB interface
converter to position ON. After the firmware update process is complete it is strongly recommended to set
4th switch of configuration DIP-switch SA2 back to position OFF.

In Pts_config.exe utility leave a COM-port closed and go to tab “Firmware update”. On the opened form
select a COM-port of connected interface converter, path to a file with a new firmware and press a button
“Start update”. Firmware will start to be updated. Wait until the process is finished. In case of any errors -
restart a tool and try again.
Select a COM-port with Select a file with

connected converter new firmware
Button to start Button for emergency

firmware update stop of update
In case if the firmware is not being updated – power off the interface converter, click to start firmware
update and power on the interface converter. At this the firmware update process should start.
NOTE! In order to prevent interface converter firmware from accidental update it is strictly recommended
to keep 4th switch of configuration DIP-switch SA2 in OFF position in any moment of time except for
firmware update needs.

INSTALLATION REQUIREMENTS FOR PETROL STATION
WARNING! Manufacturer guarantees reliable and stable operation of products only at compliance with
below requirements. In case of absence of uninterruptible power supply or incorrect wiring of products
to it any claims to malfunction of software are not accepted.
1. Requirements to power supply
The described products come into structure of control system (POS) for petrol station. Power supply of the
products should be done from a separate power supply with built-in filter of radio frequency interferences
and limiter of high voltage pulse interferences. Power supply should have a safety factor of 1.5.
At emergency switching off the power supply or in case of power voltage exceeding its permitted ranges
the products can switch off with loss or corruption of data and possible damage of hardware and software.
Power supply of all electronic blocks of POS and electronic pumpheads of dispensers, which are connected
through information lines, should be made from single common uninterruptible power supply source (UPS).
Connection of other devices to given UPS is strictly prohibited. UPS should be of continuous action (online)
and work with double conversion with output voltage regulation. UPS should have a safety factor of 1.5.
Filter of radio frequency interferences and limiter of high voltage pulse interferences should be used for
feeding equipment from UPS.
Supply of electronic pumpheads of dispensers should be made from the UPS unit using 3-wires scheme
with isolated neutral through dedicated two-pole breaker for each dispenser. Connection of other parts of
dispenser to UPS unit (expect electronic pumpheads) is strictly prohibited.
UPS unit should be connected to a separate three-pole socket fed through the three-wire feeder (phase,
neutral, ground wires) with insulated neutral from a dedicated circuit breaker of switchboard. Feeder
coming from the switchboard to the socket should located not closer than 0.3 meters to other feeders. The
socket should be located at a distance of not more than 1 meter away from the POS. Phase wire of the
feeder should not have any other consumer, which are sources of interferences (for example motors).
For protection of POS and UPS from secondary effects of atmospheric electricity it is required to install
high-voltage arresters (dischargers) at the transformer substation or on poles of power lines.
2. Requirements to grounding
In the switchboard the ground wire of feeder socket should be connected to the grounding screw, which
should be connected by means of welding with a protection grounding circuit of petrol station by steel wire
with a diameter of not less than 5 mm.
Protection grounding circuit of petrol station should correspond to safety requirements and be separated
from the station lightning protection circuit. Distance from the nearest electrode of protection grounding
circuit to electrode of lightning protection circuit must be at least 10 meters. Resistance of the protection
grounding circuit should be not more than 4 Ohms and must be confirmed by the test report. Length of
wires from the switchboard to the nearest electrode of protection grounding circuit should not exceed 15
meters.
3. Requirements to laying of cable communications
Laying of power and information wires to dispensers should be done in separate pipes with distance of not
less than 0.3 meters between each other. For informational wires (current loops, RS-485, other interfaces)

it is recommended to use shielded twisted-pair cables (recommended type – FTP CAT 5E). The cable shield
must be connected to the ground connector on one side only – on the side of the dispenser.
4. Requirements to connection of ATG probes
Connection of ATG probes installed inside the tanks should be done only with provision of required safety
measures: in case if probes have explosion-proof protection – then armored cables should be used, in case
if probes have intrinsic safety – then connection should be performed through suitable safety barriers.

EXAMPLES OF FUEL DISPENSERS CONNECTION SCHEMES

Gilbarco dispenser connection scheme
Gilbarco Encore 500 dispenser board
- +
- +
Gilbarco dispenser board Gilbarco Euroline dispenser board
+ -
+ -

Gilbarco Highline / Dimension Assy dispenser board Gilbarco Endeavor dispenser board
+ -
(pins 23 and 24 of port P101)
+ -
+ - dispenser board
Gilbarco Endeavor
Gilbarco 3202 series dispenser board
- +
- +
+ -
Gilbarco Endeavor dispenser board
Gilbarco Frontier dispenser board

Gilbarco Frontier dispenser connection

- +
- + Gilbarco Encore dispenser board

Gilbarco Advantage China motherboard - +

Wayne Dresser dispenser connection scheme (current loop interface)
- +
Wayne Dresser dispenser iGEM board Wayne Dresser V387 dispenser board
Wayne Dresser STMTAX Duplex dispenser

Wayne Dresser iGEM2 dispenser board
board

Bennett dispenser connection scheme (2-wire current loop interface)
Bennett dispenser board

Batchen Email dispenser connection scheme

+ -
-
+
Batchen dispenser board
Batchen dispenser board

Petrotec dispenser connection scheme
- +
Petrotec dispenser board

Galileo dispenser connection scheme
- +
Galileo dispenser board

Prowalco dispenser connection scheme
Prowalco dispenser board

Petposan-S4 / Meksan-S4 / Europump-S4 dispensers connection scheme
- +
S4 computer

Yenen dispensers connection scheme
- +

Petposan-Beta / Europump-Beta dispensers connection scheme
IntBox
Petposan-Beta CPU

EuroPump dispenser connection scheme
- +
EuroPump dispenser board
+ - EuroPump EUROSTAR E2-SL dispenser computer

Mekser dispenser connection scheme
- +
Mekser dispenser board

Fuelsis dispenser connection scheme
Fuelsis dispenser pumphead computer

Line A
Line B

Falcon dispenser connection scheme
+
-
+
-
Falcon dispenser computer E11
Falcon dispenser computer E22

ORDER INFORMATION
Variant of GB-4 interface converter supply is marked with GB4-y-z, where
- y – type of supply:
o “PCB” in case if GB-4 interface converter is supplied in a view of electric board;
o “BOX” in case if GB-4 interface converter is supplied installed in mounting box with hermetic
inputs for connection of wires and a button for power supply switching;
- z – variant of supply:
o 001 – variant of supply with installed terminal blocks for controller ports
Examples of order:
- order of GB-4 interface converter in a view of electric board: GB4-PCB-001
- order of GB-4 interface converter installed in a mounting box: GB4-BOX-001

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GB interface converter

2-wire active current loop interface converter

Review date: 21 March, 2020

www.technotrade.ua page 2 from 32

REV DATE BY SECTION DESCRIPTION

www.technotrade.ua page 3 from 32

PURPOSE OF THE DOCUMENT

Also, you can call to us or visit us on:

www.technotrade.ua page 4 from 32

www.technotrade.ua page 5 from 32

www.technotrade.ua page 6 from 32

Variant of GB-4 interface converter supply in a view of electrical board (GB4-PCB-z)

www.technotrade.ua page 7 from 32

PCB BOARD CONNECTORS OVERVIEW

DIP-switch SA1 serves for selection of communication interface:

www.technotrade.ua page 8 from 32

CONNECTION SCHEME TO PTS CONTROLLER

www.technotrade.ua page 9 from 32

At connection using RS-485 interface please check the following:

www.technotrade.ua page 10 from 32

CONNECTION SCHEME TO PC COM-PORT (DATA COMMUNICATION)

Pump ports for

At connection using RS-232 interface please check the following:

www.technotrade.ua page 11 from 32

Scheme of connections of the GB interface converter to personal computer:

www.technotrade.ua page 12 from 32

Select a COM-port with Select a file with

Button to start Button for emergency

www.technotrade.ua page 13 from 32

INSTALLATION REQUIREMENTS FOR PETROL STATION

1. Requirements to power supply

3. Requirements to laying of cable communications

www.technotrade.ua page 14 from 32

4. Requirements to connection of ATG probes

www.technotrade.ua page 15 from 32

EXAMPLES OF FUEL DISPENSERS CONNECTION SCHEMES

Gilbarco Encore 500 dispenser board

Gilbarco dispenser board Gilbarco Euroline dispenser board

www.technotrade.ua page 16 from 32

Gilbarco Endeavor dispenser board

Gilbarco Frontier dispenser board

www.technotrade.ua page 17 from 32

Gilbarco Frontier dispenser connection

- + Gilbarco Encore dispenser board

www.technotrade.ua page 18 from 32

Wayne Dresser dispenser connection scheme (current loop interface)

Wayne Dresser STMTAX Duplex dispenser

www.technotrade.ua page 19 from 32

Bennett dispenser connection scheme (2-wire current loop interface)

Bennett dispenser board

www.technotrade.ua page 20 from 32

Batchen Email dispenser connection scheme

Batchen dispenser board

Batchen dispenser board

www.technotrade.ua page 21 from 32

Petrotec dispenser connection scheme

Petrotec dispenser board

www.technotrade.ua page 22 from 32

Galileo dispenser connection scheme