Communications Connections - KEP MMI-1500 Installation & Operation Manual

2.4 Communications Connections

The ports as you look at the back of the case, are the ports for connecting to a printer, PLC or some external device
(Controller Connectors).
Printer Port
(25p D-Female)
(Not Available on MMI-720, 730
and 750 models)
2.4.1 Connection to an External Device
Different cables are required for various devices. See Controller Reference Section for cable details.
Cable
The KEP part numbers have the SMIC prefix. Refer to a KEP catalog or data sheet for a complete
Requirements
listing of MMI compatible devices.
These cables can be obtained from the same distributor where you purchased the MMI.
Communications problems cause the display to show PLC no response... until communications
Warning
can be established. During this time, the controller cannot be affected by the HMI. The COM light
on the front of the HMI turns on with each communication and should appear as if always on or
slightly flickering when communications are good.
Restrict cable length to avoid communications problems due to weak signals.
Shielded cable must be used for long lengths or cables run in an electrically noisy environment.
Use twisted pair cables for all Ethernet connections.
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.
Pin assignment of the 9 Pin, Female, D-SUB, PLC [RS-232] Port. This port is used for connecting the
Pin Designations
HMI to a controller or Master HMI unit. The Auxiliary (AUX) RS232 port is also accessed through this
connector. Both PLC and AUX ports share the common ground.
PLC [RS-232]
Note:
Pin #
1
2
3
4
5
6
7
8
9
PLC [RS-232] Port
(9 pin D-Female)
Recommended distances:
RS232: ............................................................................................ less than 50' (15m)
RS485/422: ..................................................................................... less than 500' (150m)
Ethernet: ......................................................................................... less than 328' (100m)
This port is not used for programming the HMI or for printing functions.
Do not plug the MT5_PC's PLC cable end into this port.
Symbol PLC[RS232]
AUX TxD
PLC TxD Transmitted Data
PLC RxD Received Data
Not used
GND Signal Ground
AUX RxD
PLC CTS Clear to send input
PLC RTS Ready to send output
Not used
PC [RS-232] &
PLC [RS-485] Port
(9 pin D-Male)
AUX[RS232]
Transmitted Data
Received Data
Signal Ground
8
Ethernet Port
(RJ-45 Male)
(Not Available on all
models)