Securitron Magnalock Corp.
www.securitron.com
ASSA ABLOY, the global leader
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© Copyright, 2011, all rights reserved
PN# 500-10100
Page 1
Rev. D, 06/11
SECURITRON POWER SUPPLIES MODELS BPS-12-1 & BPS-24-1
OPERATION AND INSTALLATION INSTRUCTIONS
1. DESCRIPTION
Securitron's Model BPS-12-1 is a 12 volt, 1 amp power supply delivered in a single lockable
enclosure with the line voltage connection to be made by screw terminals. Model BPS-24-1 is
the same unit with 24 volt, 1 amp output. All units feature regulated, adjustable power with
integral sealed lead acid/gel cell battery charging capability. All units also meet Class 2
electrical requirements, which means under the National Electrical Code that output wiring need
not be in conduit. Always check with your local building department to make sure you are
complying with applicable wiring codes before installing these units. Note that a special
version of the BPS series operates on 220 VAC input. This carries the part number
prefix: BPSH.
The models which incorporate the suffix “H” in the part number have not 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 BPS series supply. Line voltage input presents a high
voltage shock hazard and the battery output presents a high energy hazard. If shorted, the
battery output can generate sufficient heat to ignite some materials. To insure safety, note first
that the cover LED is on whenever the supply offers danger, which is either if it is receiving line
voltage or if batteries are operating. The supply must only be opened by trained service
personnel when the cover LED is on.
3. OPERATING CHARACTERISTICS
3.1 (BPS SERIES ONLY) LINE VOLTAGE INPUT
110-120 VAC should be input to terminals "H", "N", "G", as shown in the drawing. The line
voltage current drawn by the power supply module will be approximately 500 mA. Note that a
special version of the power supply (prefix: BPSH) accepts 220 VAC input.
3.2 DC OUTPUT AND VOLTAGE ADJUSTMENT
The DC capacity of the supplies depends on the exact voltage that is set and on whether or not
batteries are employed. The supplies can output 1 Amp when set at precisely 12 or 24 VDC.
However, we recommend that supplies not be operated at maximum capacity. This reduces the
possibility of heat induced failure and also allows for later expansion of the installation. When
the supply is used with batteries, available current capacity is reduced. This is because
the voltage must be set higher to 13.5 or 27 volts (these are the factory set values) and also
because some current is used to charge the batteries. 900 mA should be considered the
maximum output of a supply used with batteries.
3.3 BATTERY CHARGING CAPABILITY
The power supply incorporates a battery charging circuit appropriate for standby rated sealed
lead acid or gel cell batteries. Dry cell or NICAD batteries must not be used. Batteries are
an option. The power supply can be used with or without them. The battery pack of the
appropriate voltage is merely connected to the red and black battery leads following correct
polarity. The batteries will be kept charged at all times by the power supply acting in concert
with the components on the board. In the event of a line voltage power failure, the batteries will
automatically drive the load. If the emergency release terminals are opened, battery power will,
however, be cut off just as normal power from the power supply would be.
