24 ControlEdge HC900 Process & Safety Controller User and Installation Manual Revision 10
May 2019
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 10 – Rack Options