Gasboy CFN Series Diagnostic Manual - Manual (Page 345)

Site Controller III
1116 12-11
P8 - Memory PCB Communication ports Interface (Continued)
Pins B1 - B16
Pinout Pin Function Voltage
B1 RXD – Receive data, port 4  receive; +5VDC OFF
B2 DSR – Data set ready, port 4  0VDC – ON
B3 TXD – Transmit data, port 4  transmit; +5VDC OFF
B4 CTS – Clear to send, port 4  0VDC – ON
B5 DCD – Carrier detect, port 4  0VDC – ON
B6 RTS – Ready to send, port 4  0VDC – ON
B7 DTR – Data terminal ready, port 4  0VDC – ON
B8 DC Ground DC Ground
B9 DTR – Data terminal ready, port 3 Not used +5VDC
B10 RTS – Ready to send, port 3
0VDC Tokheim Channel 1;
+5VDC Tokheim Channel 2
B11 TXD – Transmit data, port 3  transmit; +5VDC OFF
B12 DSR – Data set ready, port 3 Not used 0VDC
B13 RXD – Receive data, port 3  receive; +5VDC OFF
B14 DCD – Carrier detect, port 3 Not used 0VDC
B15 CTS – Clear to send, port 3 Not used 0VDC
B16 +12VDC +12VDC