GE Series 90-30 PLC

C-4 Series 90-30 PLC Installation and Hardware Manual – August 2002 GFK-0356Q
C
Pin Assignments for the Isolated Repeater/Converter
Table C-1. Isolated Repeater/Converter Pin Assignments
J1 RS-422 Port (25-pin female connector) J2 RS-422/RS-232 Port (25-pin female connector)
Pin Signal Description Pin Signal Description
1 NC 1 NC
2 NC 2 SD Send Data (RS-232)
3 NC 3 RD Receive Data (RS-232)
4 NC 4 RTS Request to Send (RS-232)
5 NC 5 CTS Clear to Send (RS-232)
6NC 6NC
7 0V Ground Connection 7 0V Ground Connection
8 CTS(B’) Clear to Send (Optional Termination) 8 CTS(B’) Clear to Send Optional Termination)
9 CTS(A’) Clear to Send (Optional Termination) 9 CTS(A’) Clear to Send (Optional Termination)
10 CTS(B’) Clear to Send 10 RTS(B) Request to Send
11 CTS(A’) Clear to Send 11 RTS(A) Request to Send
12 RTS(B) Request to Send 12 CTS(B’) Clear to Send
13 RTS(A) Request to Send 13 CTS(A’) Clear to Send
14 RD(B’) Receive Data 14 SD(B) Send Data
15 RD(A’) Receive Data 15 SD(A) Send Data
16 SD(A) Send Data 16 RD(A’) Receive Data
17 SD(B) Send Data 17 RD(B’) Receive Data
18NC 18 RD(A’) Receive Data (Optional Termination)
19NC 19 RD(B’) Receive Data (Optional Termination)
20 NC 20 NC
21 NC 21 NC
22 RD(B’) Receive Data 22 SD(B) Send Data (Optional Termination)
23 RD(A’) Receive Data 23 SD(A) Send Data (Optional Termination)
24 SD(A) Send Data 24 NC
NC=No Connection
SD (Send Data) and RD (Receive Data) are the same as TXD and RXD (used in the Series Six PLC).
(A) and (B) are the same as – and + A and B denote outputs, and A’ and B’ denote inputs.
Caution
The signal ground connections (pin 7 on each connector) must be made
between the Isolated Repeater/Converter and the PLC for J1, and the
Isolated Repeater/Converter and the host computer for J2.
Pin 7 of the J1 port is connected to the metal shell of the J1 connector. Pin 7
of the J2 port is connected to the metal shell of the J2 connector. These two
signal ground connections are isolated from each other and from the power
system ground (green wire on the terminal block). To maintain proper
isolation, these signal grounds cannot be tied together.