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Description
The D9142F is a UL listed, Auxiliary Power Supply for use in Commercial Fire Alarm System
applications. It provides up to 4 amps of power for charging batteries and powering auxiliary or
indicating devices. The D9142F is provided in its own red enclosure that is louvered for ventilation. The
green AC LED and the red Trouble LED are visible through the door. The enclosure also has room to
install two 12 volt, 7 amp hour batteries. Power is supplied to the system via the D1601 Transformer.
This specialized transformer provides power to both the D9142F and to the control/communicator.
The D9142F supervises all critical circuits of the power supply. It provides several installation and
service outputs for troubleshooting. Five different trouble conditions can be recognized and optionally
communicated to the central station. These trouble conditions are also annunciated by on board and off
board LED indicators. A summary trouble relay can be programmed to give a general trouble indication.
Battery Lead Supervision is provided for both batteries when they are connected as described in the
Installing the Batteries section of this manual.
System Components
The D9142F Power Supply is shipped in three separate packages. The D9142M and installation
instructions come in one package. The D8109L comes in a second package and the D1601 transformer
comes in a third package.
Figure 1: D9142F System
D9142F Operation and Installation
F01U036364-03
Page 2
© Bosch Security Systems, Inc.
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