
20
Connections
12.5 Optional plug-ins
There are two communication cassettes available for the HMX700 series. Depending on the touch
terminal type, there are one or two expansion slots.
Slot #2 and slot #4 are available only if the plug-in module is equipped with the bus extension connec-
tor.
Module
Application
Max. No. of plug-ins
Bus extension connector
PLCM03
Serial RS232
2
Yes
PLCM04
Serial RS485
2
Yes
If you are planning to use PLCM03 and PLCM04 (additional serial ports), the COM port numbers will
be assigned as follows:
•
A module plugged in slot #1 or slot #2 will be COM2,
•
A module plugged in slot #3 or slot #4 will be COM3.