Power Supply; Primary (Ac) Power; Install The Transformer - Bosch B9512G Installation And System Reference Manual

36 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

1
The control panel uses a 16.5 VAC, 40 VA, internally-fused transformer (D1640) for its primary
power source. The control panel draws 190 mA when idle and 265 mA when in the alarm
state.
The auxiliary power available for powered devices is 1.4 A.
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 (Terminal 10), marked with the
icon. Ensure that you connect the terminal to a proper ground.
Refer to Connect earth ground, page 32.
AC power fail
The system indicates an AC power failure when the transformer input 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.
When the control panel loses AC power long enough for the battery to become low, the
control panel adds a Battery Low event to the event log. If the battery continues to discharge
below the load shed threshold, the system ceases to operate and generates no further events.
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.
1.
2.
3.
4.
5.
D8004 Transformer Enclosure required for fire systems
Use the D8004 Transformer Enclosure for the D1640 Transformer in fire and combined fire
and burglary applications.
2016.06 | 08 | F.01U.303.996
2
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 Panels
Bosch Security Systems, Inc.