Power Supply; Secondary (Dc) Power; Install The Battery - Bosch B9512G Installation Manual

Control panels
4

Power supply

This section provides information on installing and maintaining primary power, batteries, and
auxiliary power.
4.1

Secondary (DC) power

4
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.
Refer to Standby battery requirements and calculations.
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 38 Ah of battery.
4.1.1

Install the battery

1.
2.
3.
4.
5.
6.
Warning!
High current arcs are possible
The positive (red) battery lead and the terminal labeled 5 can create high current arcs if
!
shorted to other terminals or the enclosure. Use caution when you touch the positive lead
and the terminal labeled 5. Always disconnect the positive (red) lead from the battery before
you remove it from the terminal labeled 5.
Caution!
Battery terminals and wire are not power limited
!
Maintain a 0.250 in (6.4 mm) space between the battery terminals, battery wiring, and all
other wiring. Battery wiring cannot share the same conduit, conduit fittings, or conduit
knockouts with other wiring.
Bosch Security Systems B.V.
5
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 4 .
Connect the other end to the negative (-) side of the battery.
Connect the red battery lead to 5.
Connect the other end to the positive (+) side of the battery.
UL Installation manual
Power supply | en 13
2019-12 | 06 | F.01U.304.001