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2.17 24 Vdc Power Distribution
Dual power distribution cables
To improve reliability, 24 Vdc distribution to the card files is always provided by two power distribution
cables.
Standard Power System
The early production Standard Power System provides eight 6-pin connectors located on its backpanel.
Three card files and a Digital Input Power Distribution Assembly or Galvanic Isolation Power
Distribution Assembly can be redundantly powered.
The enhanced HPM Standard Power System provides twelve 6-pin connectors located on its backpanel.
This allows a greater flexibility in providing power to card files and Power Distribution assemblies.
AC Only Power System
The AC Only Power System also provides eight 6-pin connectors located on the AC/DC Distribution
Assembly that will redundantly power three card files and a Digital Input Power Distribution Assembly
or Galvanic Isolation Power Distribution Assembly.
Typical cabinet power distribution
The following figure illustrates the typical 24 Vdc cabinet power distribution to the card files, Digital
Input Power Distribution Assembly, and Galvanic Isolation Power Distribution Assembly for the various
Power System configurations.
Secondary Pow er
R688
December 2020
Figure 35 Typical Cabinet 24 Vdc Power Distribution
Primary Pow er
Supply Module
Supply Module
Pow er System Backplane
AC/DC DIstribution Assembly
HPM High-Performance Process Manager Service
Honeywell
2 Equipment Description
2.17 24 Vdc Power Distribution
Card File 1
Card File 2
GI Power
Distribution
Assembly
DI Pow er
Distribution
Assembly
or
6 56 9
99
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