4
z
The ICS 3-304.81 Safety Recommendations are reproduced by permission of the National Electrical
Manufacturers Association from NEMA ICS 3-304
2.3 Limited Liability Warranty
Weintek products include the isolated power supply are covered by a limited liability warranty from defects
in material and workmanship. This warranty does not apply : (a) if, in the judgment of Weintek, the product
fails due to damage from shipment, handling, storage, accident (natural and man-mad) ; (b) if the product
fails due to misuse, including but not limit to incorrect set-up and wiring, current leakage from machine
platform and incorrect input power ; (c) if the product has been maintained in a manner not conforming to
product's instructions or has been modified in any way, (d) if the serial number has been defaced or removed.
2.4 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).
2.4.1 Connector COM1 [RS232], COM2 [RS232]
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-8000 will turn on with each Ethernet
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
Pin assignment of the 9 Pin, Male, SUB-D, COM1 [RS-232] and COM2
[RS-232] Port.
Pin Designations
COM1 [RS-232]
COM2 [RS-232]
Pin# Symbol
COM1 [RS232]
COM2 [RS232]
1 Not
used
2 RxD Received
Data
3 TxD Transmitted
Data
4 TxD
Transmitted
Data
5 GND
Signal
Ground
6 RxD
Received
Data
7
RTS
Ready to send output
8
CTS
Clear to send input
9 Not
used
