Figure 3-3: I/O rack with redundant power supplies
Item Description
1 Rack, available in 4-, 8- or 12-slot versions
2 Power Supply
Redundant power supply is optional and only available in 8- or 12-slot racks.
You can only install one power supply in either of the two slots.
3 CPM or EPM with Security Cover
4 Grounding bars (for I/O wiring; optional; required for safety applications)
5 Input/Output modules
6 I/O Terminal Blocks
7 Power Status Module (PSM) (required if using redundant power supply)
Control Processor Module (CPM)
CPM (900CP1-0200) contains most of the electronics required to
perform the function of a process controller. A redundant CPM rack
contains two CPMs. Either CPM can be primary.
The CPM is shown in the following figure.
18
Chapter 3 - Hardware
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