Connecting Auxiliary Devices; Power Supply Supervision - Bosch 24VDC Operation And Installation

Do not connect more than 1.5 amps of stand-by or continuous current to the D9142F. The alarm load can not exceed 3
amps. Together the continuous and alarm load cannot exceed 4 amps.
Example: If your stand-by current or continuous load is 1.5 amps, the alarm power cannot exceed 2.5 amps for all
devices connected to the D9142F.

Connecting Auxiliary Devices

The D9142F has a 4 Amp, 24 VDC Power Supply with a current limited output for powering devices like smoke
detectors, bells, horns, strobes, or other 24 volt devices.
Connect device wiring as shown in Figure 6. Power Limited and Non-Power Limited wiring inside the enclosure should
be kept separate. Maintain at least 1/4" spacing between all field wiring and the AC and Battery harnesses (see Figure
1). Be sure to observe correct polarity when connecting devices, see Technogram F01U036292 for a list of
compatible devices. The terminals 8 and 9 are not functional.

Power Supply Supervision

The D9142F supervise five trouble conditions which can be individually identified back to the central station or grouped to
activate a summary trouble relay. These five trouble conditions are as follows:
© Bosch Security Systems, Inc.
• AC Power Failure
• On Board AC Fuse Failure
• Power Output Fault
• Battery Test Failure
• Battery Trouble: Low, Missing or Shorted
Figure 6: Connecting Power Output to Devices
D9142F Operation and Installation
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