GE 90-30 PLC Series Installation And Hardware Manual page 348

A
Table A-2. Series 90 PLC, RS-422 Serial Port Pin-out
2
3
4
5
6
7
8
9
0
2
3
4
5
*
** Termination resistance for the Receive Data (RD) signal needs to be connected only on units at the
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.
Figure A-2. Workmaster RS-232 Serial Port Connector Configuration
A-4 Series 90-30 PLC Installation and Hardware Manual – August 2002
Pin Number Signal Name
Shield
ATCH *
+5V *
RTS (A)
Signal Ground
CTS (B')
RT *
RD (A')
RD (B')
SD (A)
SD (B)
RTS (B)
CTS (A')
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.
end of the lines. This termination is made on the Series 90 PLC products by connecting a jumper
between pins 9 and 0 inside the 5-pin D-shell with the following exception
For Series 90-70 PLCs with Catalog Numbers IC697CPU73 J, and IC697CPU77 G and earlier the
termination for RD at the PLC is implemented by a jumper between pins 9 and
WORKMASTER II
13
PIN
1
Description
No Connection
No Connection
Hand-Held Programmer attach signal
+5V Power for: HHP and RS-232/485 Converter
Request To Send
Signal Ground, OV
Clear To Send
Terminating Resistor for RD **
Receive Data
Receive Data
Send Data
Send Data
Request To Send
Clear To Send
a44522
WORKMASTER
(EARLY MODEL)
5
9
25
PIN
6
1
12
.
GFK-0356Q