Rockwell Automation 2755-DM9, -DM9E High Speed Decoder User Manual
Page 23
Chapter 3
How the Decoder Operates
3–4
interfaces (RS-232, RS-422, and RS-485) provide a variety of ways to
accomplish communications with a host. Figure 3.5 illustrates some of the
possible host interfaces.
Note: You can also use the decoder as a stand-alone device using the discrete
outputs for control.
Figure 3.5
Communications Interface Examples
PLC TO DECODER USING
A FLEXIBLE INTERFACE
MODULE (RS-485)
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PLC
2755-DM9
Decoder
2755-DM9
Decoder
2755-DM9
Decoder
2755-DM9
Decoder
2755-DM9
Decoder
2755-DM9
Decoder
2755-DM9
Decoder
2755-DM9
Decoder
2755-DM9
Decoder
1771 I/O Rack
2760-RB
2760-SFC2
1
2
31
1
2
31
31
1
2
PLC
RS-232 or RS-422
PLC TO DECODER USING A
FLEXIBLE INTERFACE
MODULE (RS-232, RS-422)
Catalog No. 2760-RB is a Flexible Interface
Catalog No. 2760-SFC1, -SFC2 are Protocol Cartridges
2755-DM9
Decoder
2755-DM9
Decoder
2755-DM9
Decoder
1771 I/O Rack
2760-RB
2760-SFC1