Section 1 Introduction AC 800M – General
3BSE036351-510 A 31
classified applications. If the application is not SIL classified, standard S800 I/O
units can be used with AC 800M HI controller.
Figure 1 shows the physical appearance of an AC 800M Controller with an
S800 I/O Unit. This physical appearance does not apply to PM891.
Figure 2 shows the PM861 processor unit that is part of the AC 800M controller.
This processor unit is different from PM891.
Figure 1. Example of an AC 800M Controller (except PM891) with an S800 I/O
Unit
AC 800M I/O System
S800 I/O
unit
Processor
unit
Communication
interface
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