GE Series 90-30 PLC

D-2 Series 90-30 PLC Installation and Hardware Manual – August 2002 GFK-0356Q
D
Pin Assignments
The pinouts of the Miniconverter are shown in the following two tables. The first table shows the
pinout for the RS-232 port, the second table shows the RS-422 port.
Pin Assignments, RS-232 Port
Table D-1 is for the RS-232 port. The direction of signal flow is with respect to the Miniconverter.
Table D-1. Miniconverter RS-232 Port
Pin Signal Name Direction
2 SD – Send Data Output
3 RD – Receive Data Input
5 GND – Ground n/a
7 CTS – Clear To Send Input
8 RTS – Request To Send Output
The pinouts were chosen to allow direct connection (using a straight through, or 1 to 1 cable (as
provided with kit)) to the IBM PC-AT. Most IBM compatible computers equipped with an RS-232
port will provide a pinout compatible with the one shown above.
Pin Assignments, RS-422 Port
Table D-2 is the pinout for the Miniconverter’s RS-422 serial port. The direction of signal flow is
also with respect to the Miniconverter.
Table D-2. Miniconverter RS-422 Port
Pin Signal Name Direction
1 SHLD - Shield n/a
5 +5 VDC - Power Input
6 CTS(A’) - Clear To Send Input
7 GND - Ground n/a
8 RTS(B) - Request To Send Output
9 RT - Receive Termination Output
10 SD(A) - Send Data Output
11 SD(B) - Send Data Output
12 RD(A’) - Receive Data Input
13 RD(B’) - Receive Data Input
14 CTS(B’) Clear To Send Input
15 RTS(A) - Request To Send Output