SARGENT Battery Packs 737 - Manual (Page 3)

02/26/09
800-810-WIRE (9473) • www.sargentlock.com • A7841B 3
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.
SARGENT 3540-3550-3570 SERIES POWER SUPPLIES
OPERATION AND INSTALLATION INSTRUCTIONS
MODELS: 3540, 3550, 3570 (24 VOLT); 3541, 3551, 3571 (12 VOLT);
and 737-12 VOLT and 738-24 VOLT BATTERY BACKUP KITS
3.5 OUTPUT TERMINALS
The CCS board has three types of output terminals. “P” terminals are on individual circuit breakers carrying +12 or +24
volts (when the emergency release terminals are closed). The “H” terminal carries the full +V output of the supply on a single
terminal (when F1 and F2 are closed). Use the “H” terminal for applications where the powered device requires more than 2
Amps of current. The Polyswitch circuit breakers cannot reliably supply more than 2 Amps of current without tripping. Never
wire multiple “P” terminals in parallel to supply increased current. This bypasses the safety role of the Polyswitch breakers
and defeats the purpose of this circuit protection. When two “P” terminals are wired in parallel, current carrying capacity is not
doubled. The current conducted through the two terminals will not be identical, so one switch will trip and then immediately
the second will trip. When “P” terminals are correctly used as isolated outputs, each is inherently current limited to Class 2
standards. Finally, the “R” terminals are for 0 volt DC negative return and are common.
* 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.
3.6 FUSING AND CIRCUIT POLYSWITCHES
The board includes: an AC fuse, DC fuse and four (CCS-4) or eight (CCS-8) polyswitches (Fig. 3). The AC fuse is on the
hot 120 VAC input and protects against an internal short in the power supply transformer. Abnormal or overload conditions
presented on the CCS-4 or CCS-8 output(s) will not be protected by the AC Fuse. The DC fuse protects the full DC output of
the supply before it is divided through the Polyswitches, providing a special type of automatic circuit breaker to the individual
“P” outputs. If one of the Polyswitches receives an overload, it will rapidly cut the current down to a small leakage current
(about 100mA) allowing the rest of the installation to continue to operate.
Note: Each “P” output includes a slide switch and LED. The slide switch cuts DC power to its respective output and the LED
monitors when the output is powered. When a Polyswitch trips, the associated LED will also go out. If all the LED’s go out,
one of the fuses has tripped or the power supply has gone into automatic shut off (discussed later). Always replace any blown
fuse with the same rated fuse.
The DC fuse should only trip if there is a short circuit in the supply itself (downstream short circuits or overloads will trip
individual Polyswitches). This could occur if the F1-H terminal block somehow contacts DC negative. Alternately, if you
are not using the “P” terminals for downstream wiring but are using the “H” terminal to operate an individual, high current,
downstream load, a short circuit or overload could trip the DC fuse.
SARGENT’s power supply family contains an additional safety feature which is automatic shut off in the event of a DC short
circuit or overload. This is often called a “crowbar” circuit. When you are using the power supply without batteries, a DC
short circuit will usually cause the power supply to shut itself off rather than tripping any fuse or Polyswitch. If batteries are
implemented, however, they will attempt to drive into the load as soon as the short circuit or overload occurs and the fuses
and/or Polyswitches will trip to maintain safety.
Fig. 3 Power Supply Wiring With CCS-8 Board
+
-
- + Class 2 Terminals: P1-P8 supply (+)V out.
Each terminal is on a separate polyswitch
which is appropriate for installations
with multiple loads.
Note: CCS-4 board contains terminals P1-P4.
CCS-8: Terminals R1-R8
are common negative
(-) DC return (0 VOLT).
Note: CCS-4 board contains
terminals R1-R4.
115 VAC Input
LED
Fire Alarm NC
contacts are open
when alarm is active
Optional
Battery Pack
G
H
AC
Fuse
Hot
Neutral Gr
ound
N
“ H” Terminal is single, High-current
output (upstream of polyswitches).
Slide switches power and
de-power each “P” output.
LEDs show output status.
CCS-8 board contains 8
switches; CCS-4 board
contains 4 switches.
B +
B -
Operation of AC and DC fuses is
described in Section 3.5