
26.
TRO
UBLESHO
OTIN
G
Comms Wiring
If Compac or Gilbarco comms are being connected, connect to the J300 port on the comms board as
shown below.
Switch SW300
This switch is used for current loop systems on channel 1 (e.g., Gilbarco, Wayne). Adjust the switch
according to the current (mA) of the site protocol as required. There are three current options.
RS232 and RS485 comms
If RS232 or RS485 comms are being used, use the table below to configure the switches and
connect the comms.
Protocol
Channel J300 terminal
Compac
1
A - RED
B - BLACK
Gilbarco
2
C - RED
D - BLACK
Site Protocol
SW300 switch
position
Wayne
45
Gilbarco AUS
30
Gilbarco USA
20
J300
J401
J400
SW300
SW400
SW401
Compac
A
B
Gilbarco
C
D
CH0 A
B GND
CH2 D
E F
+
- Tank1
+
- Tank2