Secondary (Dc) Power; Install The Battery - Bosch B9512G Installation And System Reference Manual

Control Panels
Notice!
Check with the Authority Having Jurisdiction (AHJ) about mounting transformers on specific
circuits.
6.2

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, page 110.
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.
6.2.1

Install the battery

1.
2.
3.
4.
Warning!
High current arcs are possible. The positive (red) battery lead and Terminal 5 can create high
!
current arcs if shorted to other terminals or the enclosure. Use caution when working with
the positive lead and Terminal 5. Always disconnect the positive (red) lead from the battery
before removing it from Terminal 5.
Caution!
The 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, Inc.
5
Place 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 Terminal 4 and then to the negative (-) side of the
battery.
Connect the red battery lead to Terminal 5, and then to the positive (+) side of the
battery.
Installation and System Reference Guide
Power supply | en 37
2016.06 | 08 | F.01U.303.996