AB Quality Allen-Bradley 1394 User Manual page 92

4-12 Wiring 1394 GMC and GMC Turbo Systems
SW1
Port J1, J2
Left No DH-485 Terminal
Right DH-485 Terminal (220Ω)
Publication 1394-5.0 — May 2000
Figure 4.10
SW1 - SW6 (RS-232/RS-422) Switch Settings
SW2 SW3
Port J4 Port J3
No RS-422 Terminal No RS-422 Terminal
RS-422 Terminal (220Ω) RS-422 Terminal (220Ω)
When a port is configured for RS-232 operation, you can connect
compatible serial communication devices using common RS-232
cables. Refer to the table below for signal designations and Figure
4.11 for cable recommendations. Refer to the IMC S Class Motion
Control Installation and Setup Manual (publication 999-122) for
multidrop application instructions.
RS-232
Pin Signal Description
1 NC No Connection
2 TxD Transmitted Data
3 RxD Received Data
4 DTR Data Terminal Ready
5 Com Signal Common
6 DSR Data Set Ready
7 RTS Ready To sent
8 CTS Clear To Send
9 NC No Connection
Refer to Data Highway Connection for DH-485 signal designations.
Important: The RTS/CTS and DSR/DTR signals are internally
jumpered to allow you to use standard RS-232 cables
with serial devices requiring hardware handshaking.
SW4 SW5
Port J1, J2/J4 Port J4
RS-232/422 RS-232
DH-485 RS-422
RS-422
Pin Signal Description
1 TxD+ Transmitted Data (+)
2 TxD- Transmitted Data (-)
3 RxD- Received Data (-)
4 TxD+ Transmitted Data (+)
5 Com Signal Common
6 TxD+ Transmitted Data (+)
7 RxD+ Received Data (+)
8 RxD+ Received Data (+)
9 NC No Connection
SW6
Port J3
RS-232
RS-422