Honeywell HC900 - Electrical Considerations

Revision 6 HC900 Process & Safety Controller User and Installation Manual 45
21 April 2017
Pre-Installation Planning
Overview
Methodical pre-planning of an installation will preclude false starts and errors that can cause costly
hardware re-configuration and/or poor system performance. Factors to consider in your pre-installation
planning include:
 C75 CPUs require two Power Supply Modules -900P01 or 900P02 power supplies. C70R CPU requires
900P02 power supplies.
 I/O Rack can use AC Power Supply 900P01, 900P02 (see page 46) or +24DC Power Supply 900P24
(see page 48).
 Limit of ten 4 channel, (five 8 channel or two 16 channel if powered from backplane) Analog Output
modules can be installed per rack. Limit of 4 PFQ modules.
 Power Supply rack space (if using redundant I/O power) (see page 49)
 Rack orientation and mounting (see page 48)
 Remote Terminal Panels (see page 51)
 Environmental conditions (see page 51)
 Heat rise de-rating (see page 52)
 Cabling/wiring distance planning (see page 54)
 Electrical considerations: controller grounding, CE conformity, grouping wires, master control relay for
emergency shutdown (see page 56)
 System monitor function blocks (see page 62)