Honeywell HPM, Service

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2 Equipment Description
2.15 Power Systems
90 HPM High-Performance Process Manager Service R688
Honeywell December 2020
CMOS backup time duration
The following CMOS backup durations are defined for a HPM cabinet containing redundant HPMMs
and a total of 40 IOPs (40 nonredundant or 20 redundant pairs). The time duration depends on which
type of power system exists in the specific HPM cabinet.

Early production Standard Power System versions = 12 hours
(uses three AA size NiCad batteries). This version of power system also exists in the currently
installed PM/APM cabinets.

Enhanced HPM Standard Power System = 45 hours
(uses three C size NiCad batteries)
Nearly all of the CMOS backup power is consumed by the HPMMs. A cabinet with a nonredundant
HPMM will have a battery backup time of approximately double the values listed above.
Adding/deleting IOPs does not affect the times to any great extent. The current draw of each IOP is
almost negligible.
Honeywell does not specify that upgrading an existent PM/APM cabinet to HPM functionality must
include a new power system. The user must decide if the current power system in their upgrade
PM/APM cabinet provides sufficient CMOS backup time. The newer enhanced Standard Power System
provides a longer CMOS backup time.
PSM redundancy requirements
Configuration rules specify that an HPM cabinet containing redundant HPMMs must have a power
system with redundant Power Supply Modules.