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Serial I/O Port to Device Cabling
Please note the following cabling considerations:
•
All jacks on the PM16-RJ and CMX16-RJ units face the front
of the product with the key pointed down. Refer to Figure 5-8
for the modular jack wiring orientation.
•
Although the port modules use 10-pin modular jacks, the signal
pinouts have been arranged such that 4-, 6- or 8-wire modular
plugs may be used. Since the receive and transmit signals (and
ground) are on the inner four wires, a 4-wire connection may
be made to data-only devices.
•
Either twisted-pair or flat modular cable may be used as a
signal path from PM16-RJ and CMX16-RJ SuperSerial ports
to peripheral devices. However, twisted-pair cables will
greatly increase the operating distance.
Twisted-pair cables significantly increase the operating distance
between SuperSerial ports and peripheral devices.
Figure 5-10. Cable pin- outs for RJ-45 to terminal/printer DB-25
5-7
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