Honeywell HC900, User And Installation Manual

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30 HC900 Process & Safety Controller User and Installation Manual Revision 6
21 April 2017
Redundancy Switch Module (C75/C75S only)
The Redundancy Switch Module (RSM) is shown in Figure 13.
It sits between C75/C75S controllers in the redundant controller rack. Left Controller is
designated
“CPU-A”; right Controller is “CPU-B.” Features include:
1. Lead/Reserve controller status indicators.
2. Keyed switch for manual changes to controller modes or to facilitate a Manual Fail
Over.
Figure 13
– Redundancy Switch Module
Scanner 1 Module (S50/S50S only)
900S50, Scanner1 module is shown in Figure 14.
It sits in the I/O rack and provides the link between the controller and
remote I/O. Features at the front of the module include:
1. LED status/diagnostics indicator for scanner functions.
2. One private Ethernet 10/100 Base-T Port; connects to the I/O
expansion port on Controller Module (or to a port on a Switch that
connects to the Controller Module)
3. LED status/diagnostic indicators for communications functions.
Figure 14
– Scanner 1 Module
1
2