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Copyright March 2003, Computer Dynamics, Inc.
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MPAC-18 Manual
Table 7 Serial Jack, RS232 & RS485
RS232 Jack
DB9 Pin Assignment RS-232C
Name
Direction
1 DCD
(Data Carrier Detect)
CF In
2 RX
(Receive Data)
BB In
3 TX
(Transmit Data)
BA Out
4 DTR
(Data Terminal Ready)
CD Out
5 GND
(Signal Ground)
AB GND
6 DSR
(Data Set Ready)
CC In
7 RTS
(Request to Send)
CA Out
8 CTS
(Clear to Send)
CB In
9 RI
(Ring Indicator)
CE In
RS485 Jack
DB9 Pin Assignment Direction
1 NC
2 Rx- In
3 Tx+ Out
4 NC
5 GND GND
6 NC
7 Tx- Out
8
Rx+
In
9 NC