GE 90-30 PLC Series Installation And Hardware Manual page 276

10
Cables
In order to use an RS-232 cable on port 2 of the Series 90-30 PLC, either a special cable must be
made following the serial port pin assignments shown above or a WYE cable must be used. The
WYE cable allows use of standard Series 90-70 cables (IC690CBL701/702/705) for the PCM or
ADC. When installing the CMM module, use the WYE cable in conjunction with cables that you
build for the CMM module according to directions in Chapter 8 of GFK-0582, the Series 90 PLC
Serial Communications Manual.
GFK-0356Q Chapter 10 Cables 10-37