SARGENT Battery Packs 737 - Manual (Page 2)

800-810-WIRE (9473) • www.sargentlock.com • A7840B
02/26/09
Copyright © 2009, Sargent Manufacturing Company
, an ASSA ABLOY Group company
. All rights reser
ved.
Reproductions in whole or in part without express written permission of Sargent Manufacturing Company is prohibited.
2
SARGENT 3520 SERIES POWER SUPPLIES
OPERATION AND INSTALLATION INSTRUCTIONS
MODELS: 3520 (24 VOLT); 3521 (12 VOLT) SUPPLIES;
and 737-12 VOLT and 738-24 VOLT BATTERY BACKUP KITS
A DC short will not damage the power supply,
but the load will be shut off. To protect against a
short circuit when batteries are being employed,
a 2.5 Amp DC Polyswitch breaker is provided.
The Polyswitch functions as an automatic circuit
breaker. If it receives an overload, it rapidly cuts
the current down to a small leakage current
(about 100 mA). If this happens there is a reset
procedure. All loads must be removed from the
Polyswitch for a period of 10 seconds. This is
accomplished by simply disconnecting the load
wiring from the ”DC+” or “DC-” terminal. A short
circuit condition must be corrected in order for the
Polyswitch to reset.
3.5 CIRCUIT POLYSWITCHES AND FUSING
The power supplies have a 1 Amp AC Line Voltage Fuse and a 2.5 Amp DC Polyswitch. The AC fuse is on the hot 120 VAC
input and protects against a transformer internal short. A short in the DC load will not blow the AC fuse as the power supply
is short-circuit protected. The unit will shut off, if more than its rated output is attempted to be drawn.
3.4 EMERGENCY RELEASE
Factory setting is 12 volts for 12 volt unit and 24 volts for the 24 V unit. Emergency
release of DC output at the power supply is accomplished by using the unconnected “F”
terminal. Connect the contacts of the release switch between “DC+” and “F” and then
connect the load to “DC-” and “F”. When the emergency release contacts open, all DC
power will be cut off. When used with a UL listed fire alarm system, use auxiliary latching
normally closed contacts.
Note: Do not use “trouble” contacts (Fig. 2). * A trouble contact is a contact closure that
comes from the fire panel. A trouble contact is energized when a fire panel
experiences an integrity issue either internal to the panel or wiring to the panel.
Fig. 1 Load Wiring and
Emergency Switch Contact
Note: Connect DC+ load to F terminal when
adding switch for emergency release.
Load
N/C
Normally
Closed Switch
DC- DC+
TB2
3.6 ADDING BATTERIES TO A 3500 SERIES POWER SUPPLY
To connect batteries, follow these directions:
1. Install batteries as shown (Fig. 3).
2. The voltage adjustment potentiometer V.ADJ (Fig. 2) must be set without the
batteries connected. The voltage should be read at the flying leads of the
battery connection.
3. Set the voltage output by rotating the V. ADJ potentiometer on the power
supply module to 13.5 volts for 12 volt supplies; and 27 volts for 24 volt
supplies (Fig. 2).
4. IMPORTANT: Cutting and removing the WARNING label is necessary to make
connection and indicates understanding and acceptance of the conditions
and settings necessary for proper operation.
5. Connect the black flying lead to battery negative (-) and the red flying lead to
battery positive (+) (Fig. 2).
Fig. 3 Power Supply With Batteries Installed
+
-
+ -
115 VAC Input
Line Voltage
Fuse (1AMP)
Connector to
“Power On” LED
Voltage
Adjustment
Low Voltage AC
From Transformer
DC (-)
DC (+) Unconnected Terminal
For Switch Connection
Optional
Battery Pack
2.5 AMP
Polyswitch Breaker
G
H
N
Fuse
Hot
Neutral Gr
ound
+ -