Installation Instructions

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.
1. 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).
2. Connect the wire to the control panel.
3. Connect the wire to the transformer.
4. Plug the transformer into an unswitched, 120 VAC, 60 Hz
power outlet only.
5. Secure the transformer to the outlet with the screw
provided (not applicable in Cananda).
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.
4.1.1
4.2
18 en | Power supply Control Panels
2015.09 | 08 | F.01U.287.185 Bosch Security Systems, Inc.