Securitron BPS-12-15, BPS-12-3, BPS-12-3-M1, BPS-12-45, BPS-12-6 Installation Instructions

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SECURITRON POWER SUPPLIES

MODELS: BPS-12-3, 4.5. 6, 9 AND 15; BPS-24-2, 3, 4, 6 AND 10

OPERATION AND INSTALLATION INSTRUCTIONS

1. DESCRIPTION

These instructions cover 10 different models as shown above. The part number expresses first
the output voltage (12 or 24) and second the maximum output current capacity. For
example, a model BPS-24-6 can supply up to 6 amps at 24 volts. Securitron large power
supplies consist of a power module and CCS control board to which all installer connections are
made. The board accomplishes several functions. It provides terminals for line voltage input
and DC outputs on separate circuits, so that a number of devices can b e powered. Models BPS­12-3, BPS-12-4.5, BPS-24-2 and BPS-24-3 are furnished wi th the CCS-4 control board with four
separate output circuits. The other larger units in the range are furnished with the CCS-8
control board with eight separate output circuits. Each control circuit has an individual slide
switch to turn it on and off and an LED to annunciate its status. The CCS control board also
provides LED indication showing that the power supply is on, emergen cy release terminals, line
voltage and DC fuses and sealed lead acid - gel cell battery charging capability. All power
supplies in the BPS series are Class 2 rated when installed following these instructions.

The models which incorporate the suffix “H” in the part number have no t been evaluated by UL.
These power supplies have only been evaluated by UL for use in the EXD-1 and EXD-1F FWAX
systems.

2. SAFETY

Two hazards are present in
the supply. Line voltage
input presents a high voltage
shock hazard and the
DC/battery output, represent
a high energy (current)
hazard. A shorted battery
can swiftly supply levels of
current sufficient to melt
wiring insulation and cause a
fire. To insure safety, note
first that the cover LED is on
at any time that the supply is
dangerous, which is either if
it is receiving line voltage or
if batteries are operating.

The supply enclosure must
only be opened by trained
service personnel when
the cover LED is on. Other

safety features include line voltage and DC fuses and the fact that the line voltage input
terminals are under a warning guard plate.

3. OPERATING CHARACTERISTICS

3.1 LINE VOLTAGE INPUT

110-120 VAC should be input to terminals "H", "N", "G", as shown in the drawing. This is fed to
the input of the power module through factory made connections. The line voltage current
drawn by the power supply module will be approximately half the DC output. For example, for a
4 amp power supply, the line voltage service should be able to supply at least 2 amps. Note: if
the suffix “H” appears in the part number (i.e. BPSH-24-4), the unit requires 220 VAC input.
Apart from this change, all other characteristics are the same.

© Copyright, 2011, all rights reserved PN# 500-10300
Page 1 Rev. D, 04/11

3.2 DC OUTPUT

The maximum DC output of the power supply is expressed by the final figure in the part
number. The BPS-24-3 can supply up to 3 amps; the BPS-12-6, up to 6 amps etc. However,
these power supplies are adjustable and the voltage level set affects the current output capacity.
When used with batteries, the power supplies must be set at 12. 5% over voltage (13.5 V for
12 volt supplies and 27 V for 24 volt supplies). This is the factory setting and if the voltage is
to be changed, use the potentiometer marked "V Adj" on the power supply module. The current
rating takes into account the possibility of the supplies operating at 12.5% over voltage.
Therefore any supply which is operated at its nominal voltage (12 or 24 v) can supply about
20% more than its rated current. Despite this, we strongly recommend that supplies be
operated substantially below their maximum output capability. Operating power supplies at
their maximum greatly increases the possibility of heat induced failu re. "Margin for error " is lost
and this is inappropriate for a security system. Power supplies should be run at no more

than two thirds of their maximum capacity for optimum reliability

3.3 EMERGENCY RELEASE TERMINALS

If the power module is operating or if bat teries are operatin g, the LED will illuminate . +V (12 or
24VDC depending on the model power supply) will then be on terminal F1. Connection must
then be made between terminals F1 and F2 before +V is routed to the " P" termina ls. Terminals
F1 and F2 therefore constitute an emergency release point. If desired, for instance, NC
contacts controlled by the user's fire alarm syst em can be connected across terminals F1 and F2
such that the connection between these terminals will be broken in the event of a fire. UL

listed auxiliary latching normally closed contacts from the fire alarm system should be
used. "Trouble" contacts must not be used. This will au tomat ically release al l the devices be in g

driven by the unit. If the emergency release terminals are not to be used in this way, a jump er
should be placed between them so that the board's output terminals will fun ction. Make sure

that the switching capability of any switch or relay contacts placed across F1 and F2
can handle the full output load of the power supply.

Terminal FA is a free parking terminal used only with Securitron’s Power Supply Monitor.

The PSM interconnects with the power supply and m onitors the continu ed corre ct b ehavior of t he
supply including voltage level and whether the batteries are functioning . The PSM signals any
problem including whenever the battery pack takes over the load. If you are using the PSM,
wiring with the FA terminal is shown in the manual.

3.4 OUTPUT TERMINALS

The CCS board has three types of output terminals. “P” terminals are on individual circuit
breakers and carry +12 or +24 volts on them (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 device being powered
requires more than 2 Amps of current. The Polyswitch circuit breakers cannot reliably supply
more than 2 Amps of current without tripping and you should never wire multiple “P”
terminals in parallel to supply increased current. This bypasses the safety role of the
Polyswitch breakers and also does not work very well. 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 break first and then the second will immediately
trip. When “P” terminals are correctly used as isolated outputs, each is inherently current
limited to Class 2 standards. Always use the “H” terminal for applications requiring high
current. Finally, the “R” terminals are all for 0 volt DC negative return and are in common.

3.5 FUSING AND CIRCUIT POLYSWITCHES

An AC fuse, DC fuse and four or eight Polyswitches are present on the board. The AC fuse is
on the hot 120 VAC input and protects against an internal short in the power supply transformer.
A short in the DC load will not blow the AC fuse. The DC fuse protects the full DC output of the
supply prior to it being divided through the Polyswitches to the individual “P” outputs. The
Polyswitch is a special type of automatic circuit b reaker. If one of the Polyswitches receives an
overload, it will rapidly cut the current down to a small leakage current (about 100 mA) which
will allow the rest of the installation to continue to operate. Note that each “P” output
includes a slide switch and LED. The slide switch c an cut DC power to its respective output a nd
the LED monitors when the output is powered. In the event of one of the Polyswitches tripping,
the associated LED will go out. If all the LED’s go out, one of the fuses has tripped or the power

PN# 500-10300
Page 2 Rev. D, 04/11