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GENERAL GUIDELINES FOR INSTALLING

MODEL BC-35

P/N 315-086767-5

Siemens Industry, Inc.
Building Technologies Division
Florham Park, NJ

Siemens Building Technologies, Ltd.
Fire Safety & Security Products
2 Kenview Boulevard
Brampton, Ontario
L6T 5E4 Canada

The Model BC-35 battery charger/transfer module complies
with UL Standard 864. The module is designed to monitor
the battery charge status and alert appropriate personnel
when the batteries may not have the standby power
capacity required by NFPA Standard 72 Local, Municipal Tie,
Remote Station, or Proprietary.

The BC-35 charging circuit provides a charging current
only if the voltage of the batteries being used is
between 18.3 VDC and 27.7 VDC. 

If the battery voltage is

out of this range, the BC-35 will automatically cut off its
charging circuit.

CAUTION:

Disconnect the system power input before

installing the BC-35 and/or BE-35 cable connections.

The BC-35 module has a trouble signal for both high and
low battery conditions. A trouble condition occurs:

During normal AC operation when the instantaneous
or constant voltage across the battery is more than
30 volts peak or is less than 24 volts.

During the battery backup operation when the
instantaneous or constant voltage across the battery
is more than 30 volts peak or is less than 21 volts.

Summary of Contents for BC-35

Page 1: ...roprietary The BC 35 charging circuit provides a charging current only if the voltage of the batteries being used is between 18 3 VDC and 27 7 VDC If the battery voltage is out of this range the BC 35 will automatically cut off its charging circuit CAUTION Disconnect the system power input before installing the BC 35 and or BE 35 cable connections The BC 35 module has a trouble signal for both hig...

Page 2: ... and 2 below Step 2 may also be used to troubleshoot the BC 35 when a trouble condition is indicated Step 1 Test the batteries connected to the BC 35 module a Remove the battery leads b Test the open battery voltage it should be between 22 and 27 VDC c Reconnect the battery and test it under a load con dition If possible remove the AC power from the system and measure the battery voltage Activate ...

Page 3: ...arging current is displayed if the battery voltage is between 18 3 VDC and 27 7 VDC Once the battery is fully charged a pulsed charging current is present on a periodic basis The time between pulses is determined by the rate of discharge due to the internal circuitry of the charger and the ability of the individual battery to accept and maintain the charge condition The constant charge current is ...

Page 4: ...f the power supply If there are no volts at this point replace the BC 35 module If there are more than 2 VDC at this point and no alarm is present replace the CP 35 panel This information is provided to assist you in diagnosing relatively routine problems There may be extenuating circumstances involved which are not covered here If further assistance is needed please contact your Regional Engineer...

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