Components and Architecture - Hardware Components
20 HC900 Process Controller Installation and User Guide Revision 19
06/14
Rack Options
Racks are available in 4-slot, 8-slot, and 12-Slot versions. Racks are interchangeable between the
Controller rack and an I/O expansion rack (C50, C70, C75 CPU only), and all three versions shown in the
following figure are available for either purpose.
C75 only: I/O rack has Scanner 2 Module. 8 and 12 slot I/O racks can be modified with additional slots for
optional Reserve Power Supply and Power Status Module.
Note: You can install redundant power on any I/O rack.
Figure 9 – Rack Options
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