Honeywell HPM - Standard Power System; Table 83 Standard Power System Voltage Test Points; Figure 188 Power System Power Output Connector Pin Assignments

4 Fault Isolation
4.14 Power System Voltage Checks
386 HPM High-Performance Process Manager Service R688
Honeywell December 2020
Standard Power System
Voltage test points
Refer to the following figures for identification of the voltage points listed in the following table.
Table 83 Standard Power System Voltage Test Points
Voltage Test Point
Acceptable Range
Corrective Action
AC Input
120 Vac or 240 Vac
100 to 264 Vac
Check ac power source.
Power Supply
Module
Common
DC Out
PSM (25.5 Vdc)
Battery Power (54.5
Vdc)
AC Out (6 Vac for clock)
None
24 to 26 Vdc
54 to 55.2 Vdc
4.8 to 7.2 Vdc
Common reference
Replace Power Supply
Module.
Replace Battery Pack or
Power Supply Module.
Replace primary (left) Power
Supply Module.
CMOS Battery
Backup
NiCad Battery (Set of 3)
1.2 - 1.6 Vdc
(across 1 battery)
3.6 - 4.8 Vdc
(across 3 batteries)
Replace NiCad batteries.
Figure 188 Power System Power Output Connector Pin Assignments
6
5
4
3
2
1
3.9 Vdc
6 Vac
+
-
6 Vac Return
+
-
24 Vdc