Components and Architecture - Hardware Components
Revision 19 HC900 Process Controller Installation and User Guide 19
06/14
I/O Expansion Rack
I/O expansion ("remote") racks, shown in Figure 8, are available to accommodate additional input/output
modules, and/or to enable location of I/O modules close to the process and remote from the controller. For
C75, all I/O is in a rack or racks separate from the controller rack.
An I/O expansion rack includes:
1. Rack, available in 4- 8-, or 12-slot versions
2. Power Supply
3. Scanner 1 Module (C50 and C50S/C70 and C70S) (shown) or Scanner 2 Module (C75)
4. Grounding bars (for I/O wiring; optional)
5. Input/Output modules
6. I/O Terminal Blocks
7. Power Status Module (PSM)
(req’d if using Reserve Power Supply)
8. Reserve Power Supply (optional). Available in
8- or 12-slot racks.
Figure 8 – I/O Expansion Rack Components
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