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2.3 Communications Connections
The ports as you look at the back of the case, are the ports for connecting to a PLC
or some external device (Controller Connectors).
Cable
Requirements
Different cables are required for various devices.
Caution
Restrict cable length to less than 500’ (150m) for
RS485/422 devices and 50’ (15m) for RS232 devices to
avoid communications problems.
The COM light on the front of the MT-600 will turn on
with each communication.
Shielded cable must be used for long lengths or cables run
in an electrically noisy environment.
Do not run cables next to AC power lines or near sources
of electrical noise.
Be sure that the cable ends have been inserted all of the
way into mating connectors and are secure
2.3.1 Connector COM 1 [RS232]
Pin Designations
COM1 [RS-232]
Pin assignment of the 9 Pin, Male,
SUB-D, COM1 [RS-232] Port.
Pin#
Symbol Function
1
DCD
Data Carrier Detect
2 RxD Received
Data
3 TxD Transmitted
Data
4 DTR Data
Terminal
Ready
5 GND Signal
Ground
6
DSR
Data Set Ready
7
RTS
Ready to send output
8
CTS
Clear to send input
9 RI
Ring
Indicator
