Honeywell HPM, Service

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2 Equipment Description
2.16 Power Distribution
R688 HPM High-Performance Process Manager Service 95
December 2020 Honeywell
48 Volt Battery switch
A 48 Volt Battery switch that is located at the left side of the Standard Power System chassis provides a
means of preventing the Power Supply Modules from discharging the Battery Backup Module when ac
power is removed from one or both Power Supply Modules. Placing the switch in the off position
disconnects the battery to Power Supply Module paths.
No battery backup (early production Standard Power System)
When there is no battery backup, a battery backup failure is reported unless the zero-ohm resistor
jumpers, W1 and W2, located next to the Power Supply Module connectors, are cut. This is done at the
factory before shipping. If a battery backup is later installed, the connections must be restored. The
following figure is a view of the Standard Power System backpanel.
Figure 31 Standard Power System Backpanel (Early Production)
POW ER SY STEM BACKPL ANE
ASSY . NO. 51 40 11 6 6-1 00 REV
PRIM ARY
TB1
REDUNDANT
TB2
HOT
NEUT
GND
AC INPUT
NEUT
HOT
GND
POWER
SUPPLY
A
DATE CODE
3 .6V
BATT ERY
FOR CMO S
BACK UP
1
2
3
F1
1
2
3
F2
1
2
3
F3
1
2
3
F4
BLK
RED
RED
R
E
D
U
N
D
A
N
A
N
T
S
U
P
P
L
Y
A
LA
R
M
C
H
A
S
S
IS
G
N
D
C
M
O
S
B
A
C
K
U
P
A
LA
R
M
P
R
IM
A
R
Y
S
U
P
P
L
Y
A
LA
R
M
7 4 TB3 6 1 2 3
5
8 9
OUTP UT 1
4
5
6
1
2
3
J 6
OUTP UT 2
J 7
OUTP UT 3
J 8
OUTP UT 4
J 9
OUTP UT 5
J 10
OUTP UT 6
J 11
OUTP UT 7
J 12
OUTP UT 8
J 13
J 1
J 2 J 3 J 4
J 14
J 5
J 15
J 16
W2
2 0
2 5
C1 5
C1 0
C5
C1
W1
2 0
2 5
Cabinet Fan
Connector and
Fuse
Battery P ack
Connector
Pow er Cable Connector
CMOS Battery Backup Board
Connector
Zero Ohm Resistor
Jumpers
Pow er Supply Module
Connectors
4
5
6
4
5
6
4
5
6
4
5
6
4
5
6
4
5
6
4
5
6
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3