Serial Communications And Options - Honeywell VC4 User Manual

6.12 Serial Communications and Options

The rear panels of the VC4™ monitor allows installation of serial interface port. These ports are
designed to allow output to other devices, and two-way communication between the VC4™
system and another device.
There are three serial interfaces available for the VC4™ system, each designed for a specific
communication application. The options are:
RS-232 for remote bidirectional binary communication
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RS-422 for remote bidirectional binary communication
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RS-485 for remote multi-drop bidirectional binary communication via two-wire transmission
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This port is a DB-9 female connector. This port is designed for bidirectional communications
between the VC4™ system and your equipment. Signals present at the port conform to RS-232,
RS-422, or RS-485 specifications. This is based on which interface option was installed in your
VC4™ system. The pin-out specifications for each option are as follows.
VC4™ 131 User Manual