3M Dynapro ET 3170 Terminal Series B, Installation Manual

Page: 124 / 125

3M Touch Systems Proprietary Information
9
Setting jumpers
RS-232 communication
Use a standard cable for RS-232 communications. Alternatively, make a cable for
RS-232 communications using the pin-out shown in Table A. The maximum cable
length is 50 feet.
RS-422 communication
To make a cable for RS-422 communications, use the pin-out shown in Table B.
For maximum cable length, refer to the EIA RS-422 Specification Standard.
Table A: COM A RS-232 connector pin-out
Pin Signal Description In/Out
1 CGND
Shield Ground
1 ---
2 TXD Transmit Data OUT
3 RXD Receive Data IN
4 RTS Request To Send OUT
5 CTS Clear To Send IN
6 DSR Data Set Ready IN
7 SGND Signal Ground ---
8 DCD Data Carrier Detect IN
20 DTR Data Terminal
Ready OUT
22 RI Ring Indicator IN
1
Connect only one end of the cable to shield ground.
Table B: COM A RS-422 connector pin-out (full duplex)
Pin Signal Description In/Out
1 GND
Shield Ground
1 ---
9 TX+ Balanced Transmit data + OUT
10 TX- Balanced Transmit data - OUT
14 RX+ Balanced Receive data + IN
15 RX- Balanced Receive data - IN
1
Connect only one end of the cable to shield ground.