Gasboy CFN Series Diagnostic Manual - Manual (Page 339)

Site Controller III
1116 12-5
RS-485 - Loop 1 Island Communications
Pinout Pin Function Voltage
1 RS-485 Rx+
2 RS-485 Rx-
From
Island Loop  +5 VDC signal
between pins 1 & 2
3 RS-485 Tx+
4 RS-485 Tx-
To
Island Loop  +5 VDC signal
between pins 3 & 4
RS-485 - Loop 2 Island Communications (Usually to Tokheim DPTs)
Pinout Pin Function Voltage
1 RS-485 Rx+
2 RS-485 Rx-
From
Island Loop  +5 VDC signal
between pins 1 & 2
3 RS-485 Tx+
4 RS-485 Tx-
To
Island Loop  +5 VDC signal
between pins 3 & 4
RS-485 - Loop 3 Console Communications
Pinout Pin Function Voltage
1 RS-485 Rx+
2 RS-485 Rx-
From
Console Loop  +5 VDC signal
between pins 1 & 2
3 RS-485 Tx+
4 RS-485 Tx-
To
Console Loop  +5 VDC signal
between pins 3 & 4
Dual Tokheim Pump Communications Port 3
Pinout Pin Function Input/Output
1,8 Not connected
2 TTDA – Talk to Dispenser, Channel 1 Output
3 TTCA – Talk to Console, Channel 1 Input
4 TTDB – Talk to Dispenser, Channel 2 Output
5 TTCB – Talk to Console, Channel 2 Input
6,7,9 Signal ground Ground