Gasboy CFN Series Diagnostic Manual - Manual (Page 380)

CFN Islander
13-12 12/26/02
RS-232 - Modem Communications Remote Port – TB4
Pinout Pin Function Input/Output
1 TxD – Transmit data Output
2 DTR – Data terminal ready Output
3 RxD – Receive data Input
4 CTS – Clear to send Input
5 Signal ground Ground
6 RTS – Request to send Output
7 CD – Carrier Detect Input
8 DSR – Data set ready Input
9 TxC – Transmit clock, synchronous Not used
10 RxC – Receive clock, synchronous Not used
All the RS-232 ports listed above can also be configured for RS-422 mode. The table below
shows the pinout and function for these ports in the RS-422 mode. Note: On the remote port
(TB4) in RS-422 mode, pins 6 – 10 are not connected.
Communication Port RS-422 Mode – TB3, TB4,TB5 or TB6
Pinout Pin Function Voltage
1 RS-422 Tx+
2 RS-422 Tx-
From
Islander  +5 VDC signal
between pins 1 & 2
3 RS-422 Rx+
4 RS-422 Rx-
To
Islander  +5 VDC signal
between pins 3 & 4
5 Ground
The RS-485 communication to other CFN components (satellite readers, wall-mount PCUs, etc.)
comes through the upper RS-485 junction box board in the pedestal. Communication to the
console, if present, goes through the lower RS-485 junction box board in the pedestal.
RS-485 - Loop 1 Island Communications TB1 – Upper junction box board
Pinout Pin Function Voltage
1 RS-485 Rx+
2 RS-485 Rx-
From
Island
 +5 VDC signal
between pins 1 & 2
3 RS-485 Tx+
4 RS-485 Tx-
To
Island
 +5 VDC signal
between pins 3 & 4
5 Ground Ground
RS-485 - Loop 2 Console Communications TB1 – Lower junction box board
Pinout Pin Function Voltage
1 RS-485 Rx+
2 RS-485 Rx-
From
Console  +5 VDC signal
between pins 1 & 2
3 RS-485 Tx+
4 RS-485 Tx-
To
Console  +5 VDC signal
between pins 3 & 4
5 Ground Ground