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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).
2.3.1 Connector COM 1 [RS232]
Pin Designations
COM1 [RS-232]
Pin assignment of the 9 Pin, Female, SUB-D, COM1
[RS-232] Port. This port is used for connecting the
MT-600 to a controller.
Note:
This port is not used for programming the
MT-600 or for printing functions.
Pin#
Symbol Function
1 Not
used
2 TxD Transmitted
Data
3 RxD Received
Data
4 Not
used
5 GND Signal
Ground
6 Not
used
7
CTS
Clear to send input
8
RTS
Ready to send output
9 Not
used
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.
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
