26 HC900 Process & Safety Controller User and Installation Manual Revision 6
21 April 2017
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, and all three versions shown in the following figure are available for either purpose.
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 8 or 12 slot I/O rack.
Figure 9 – Rack Options
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