Communications ports – Rockwell Automation 2755-DM9, -DM9E High Speed Decoder User Manual
Page 15

Chapter 2
Description of Hardware
2–5
There are two communication port connectors on the decoder:
•
HOST port connector. The HOST port connector supports RS-232,
RS-422, and RS-485 communication interfaces. Through this port, you
can link the decoder to a host computer or programmable controller. Both
commands and data may be sent to/from the host device.
Note: The RS-485 interface allows the decoder to be installed as part of a
multi-drop network. Refer to Chapter 3 for a more detailed description.
•
AUX port connector. The AUX or auxiliary port connector allows you to
program and monitor the decoder using one of the following CRTs:
Allen-Bradley Industrial Data Terminal (Catalog No. 1770-T1, -T2, and
-T3), Allen-Bradley T45 Laptop Terminal (Catalog No. 1784-T45),
Digital VT100, Televideo 955, Lear Siegler ADM 3E, or a
terminal/computer that emulates one of the terminals listed.
Figure 2.3
Communication Ports
90-061-2
Communications Ports
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