Power Supply; Primary (Ac) Power; Secondary (Dc) Power; Install The Battery - Bosch B6512 Installation Manual

Control Panels
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 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 Earth ground, page 19.
AC power fail
The system indicates an AC power failure when the following terminals do not have sufficient
voltage: VAC: The AC Fail Time parameter sets the amount of time without AC power before
the control panel reports the failure. It also sets 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
seconds.
If the control panel fails any test, a System Trouble message appears on the keypads.
6.2

Secondary (DC) power

A 12 V sealed lead-acid rechargeable battery (such as the D126/D1218) supplies secondary
power to maintain system operation during interruptions of primary (AC) power.
Notice!
Use sealed lead acid batteries only
The charging circuit is calibrated for lead-acid batteries. Do not use gel-cell or NiCad
batteries.
Extra batteries
To increase battery back-up time, connect a second 12 V battery in parallel to the first battery.
Use a D122/D122L Dual Battery Harness to ensure proper and safe connection.
D1218 Battery
The D1218 is a 12 V, 18 Ah battery for use in applications requiring extended battery standby
time. The control panel does not support more than 18 Ah.
6.2.1

Install the battery

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Bosch Security Systems, Inc.
Put the battery upright in the base of the enclosure.
Locate the red and black leads supplied in the hardware pack.
Connect the black battery lead to BAT- .
Connect the other end to the negative (-) side of the battery.
Connect the red battery lead to BAT+.
Connect the other end to the positive (+) side of the battery.
Installation Manual
Power supply | en 21
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2018.07 | 16 | F.01U.287.180