Chapter 2. Installation and System Checkout
2-15
Wiring Battery Power
• The main battery harness connects the main system
board to the battery set in the same cabinet.
• The system requires 24V battery backup. Use two 12V
batteries, connected in series. The main battery harness
connects to the .250” fast-on battery terminals, as fol-
lows:
1. Connect black wire to the negative battery terminal
of Battery 1
2. Connect white wire from the positive battery termi-
nal of Battery 1 to the negative battery terminal of
Battery 2.
3. Connect the red wire to the positive battery termi-
nal of Battery 2.
• Connect the main battery harness to the four-position
header, located approximately in the center of the bot-
tom edge on the main system board. Insert the connec-
tor left-justified, with the red wire to the left.
• The EPS connects to the battery header next to the bat-
tery harness described in the previous bullet. Install the
EPS red/black harness right-justified to the battery
header, with the black wire to the right.
• Battery circuit is supervised, but not power-limited.
• For depleted battery cutout operation, remove jumper
per installation instructions. Separate jumper removal
required for main system board and EPS. System pro-
gramming option “Depleted Battery Cutout” must also
be selected. ULC-S527 depleted battery operation
requires jumper removal.
• For 18 Ah or larger batteries, the 4009-9801 external
battery cabinet must be used. Mount the battery box
within 20 feet of the control panel, in accordance with
the mounting instruction label in the box. All intercon-
necting wiring must be enclosed in conduit.
Figure 2-16 Battery Connections
TB1
DANGER
HIGH VOLTAGE
IN THIS AREA
DACT TELEPHONE
CONNECTIONS
EXPANSION POWER SUPPLY ASSY.
NAC MODULE
THE POWER SUPPLY MODULE, PART OF THE EPS
ASSEMBLY, IS MOUNTED BENEATH THE NAC MODULE
PORTION OF THE EPS ASSEMBLY.
734 - 180
ATTACH TO BATTERY CONNECTOR
RIGHT - JUSTIFIED, BLACK WIRE TO THE RIGHT
CONNECT TO
BATTERY TERMINALS
(FUSED ON PCB)
BLACK
RED
HARNESS 734 - 180
FROM EPS (LOWER MODULES)
TO MAIN SYSTEM BOARD
BATTERY CONNECTOR
EPS
POWER SUPPLY MODULE
TB5
1 2 3 4 5 6 7 8
TB2
1 2 3 4 5 6 7 8
TB2
1 2 3 4 5 6 7 8 9 10
TB1
3B+
3B-
3A+
3A-
4B+
4B-
4A-
4A-
24V
0V
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8
MAIN SYSTEM BOARD - CONVENTIONAL (MSB - C)
R
E
D
R
E
D
B
L
K
B
L
K
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