Power Supply; Primary (Ac) Power; Install The Transformer; Secondary (Dc) Power - Bosch B5512 Reference Manual

28 en | Power supply
6

Power supply

This section provides information on installing and maintaining primary power, batteries, and
auxiliary power.
6.1

Primary (AC) power

The control panel uses an 18 VAC, 22 VA internally fused transformer (CX4010) for its primary
power source. The control panel draws 125 mA when idle and 155 mA when in the alarm
state. The auxiliary power available for powered devices is 800 mA.
Surge protection
Transient suppressors and spark gaps protect the circuit from power surges. This protection
relies on the ground connection at the earth ground terminal , marked with the
that you connect the terminal to a proper ground.
Refer to Connect earth ground, page 25.
AC power fail
The system indicates an AC power failure when the VAC terminals do not have sufficient
voltage. The AC Fail Time parameter sets the amount of time without AC power before the
control panel reports the failure, and the amount of time after the power returns before the
control panel reports restored power.
Self diagnostics at power up and reset
The system performs a series of self-diagnostic tests of hardware, software, and programming
at power up and at reset. The self-diagnostics tests complete in approximately 10 to 30 sec.
If the control panel fails any test, a System Trouble message appears at the keypads.
6.1.1

Install the transformer

Caution!
Do not short-circuit the terminals of the transformer: Shorting the terminals opens the
!
internal fuse, causing permanent failure. Connect the transformer to the control panel's AC
power terminals before plugging it into the power source.
Notice!
Plan ahead
Route telephone, SDI2 bus wiring, and sensor loop wiring away from any AC conductors,
including the transformer wire. AC wiring can induce noise and low level voltage into adjacent
wiring.
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2.
3.
4.
5.
6.2

Secondary (DC) power

2015.07 | 12 | F.01U.287.180
Use 18 AWG (1.02 mm) wire minimum (12 AWG [2 mm] maximum) and connect the
transformer to the control panel. Make the wire length as short as possible. Do not
exceed 50 ft (15 m).
Connect the wire to the control panel.
Connect the wire to the transformer.
Plug the transformer into an unswitched, 120 VAC, 60 Hz power outlet only.
Secure the transformer to the outlet with the screw provided (not applicable in
Cananda).
Installation and System Reference Guide
Control Panel
icon. Ensure
Bosch Security Systems, Inc.