GE Series 90-30 PLC

A-4 Series 90-30 PLC Installation and Hardware Manual – August 2002 GFK-0356Q
A
Table A-2. Series 90 PLC, RS-422 Serial Port Pin-out
Pin Number Signal Name Description
1
2
3
4
Shield
ATCH *
No Connection
No Connection
Hand-Held Programmer attach signal
5
6
7
8
+5V *
RTS (A)
Signal Ground
CTS (B’)
+5V Power for: HHP and RS-232/485 Converter
Request To Send
Signal Ground, OV
Clear To Send
9
10
11
12
RT *
RD (A’)
RD (B’)
SD (A)
Terminating Resistor for RD **
Receive Data
Receive Data
Send Data
13
14
15
SD (B)
RTS (B)
CTS (A’)
Send Data
Request To Send
Clear To Send
* Signals available at the Connector but are not included in the RS-422 specification.
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.
** Termination resistance for the Receive Data (RD) signal needs to be connected only on units at the
end of the lines. This termination is made on the Series 90 PLC products by connecting a jumper
between pins 9 and 10 inside the 15-pin D-shell with the following exception
For Series 90-70 PLCs with Catalog Numbers IC697CPU731J, and IC697CPU771G and earlier the
termination for RD at the PLC is implemented by a jumper between pins 9 and 11.
Workmaster Serial Port
The Workmaster II industrial computer, RS-232 serial port is a 25-pin D-type male connector, and
the early model Workmaster is a 9-pin male connector.
Figure A-2 shows the serial port connector layout for both computers. Table A-3 shows the pin
numbering and signal assignment for both connector types.
a44522
13
25
9
WORKMASTER
(EARLY MODEL)
PIN
1
12
5
6
PIN
1
WORKMASTER II
Figure A-2. Workmaster RS-232 Serial Port Connector Configuration