Power Supply And Power Outputs; Power Supply - Primary; Primary (Ac) Power Circuit; Installing The Transformer - Bosch D9412GV3 Installation Instructions Manual

16 en | Power Supply and Power Outputs
3

Power Supply and Power Outputs

3.1

Power Supply - Primary

3.1.1

Primary (AC) Power Circuit

The primary source is a 16.5 VAC, 40 VA, internally-fused transformer (Bosch Security
Systems, Inc. Model D1640). The control panel draws 200 mA when idle and 300 mA when in
an alarm state. The total available auxiliary current is 1.4 A. Transient suppressors and spark
gaps protect the circuit from power surges. This protection relies on the ground connection at
Terminal 10. Ensure that you connect Terminal 10 to a proper ground. Refer to
Section 1.5 Connecting Earth Ground, page 5.
AC Power Fail
The system indicates an AC power failure when Terminals 1 and 2 do not have power. The AC
Fail Time parameter sets the number of minutes or seconds without AC power before the
control panel acknowledges the failure and the number of minutes or seconds after the power
returns before the control panel acknowledges restored power.
Refer to the D9412GV3/D7412GV3 Program Entry Guide (P/N: F01U170807) or the
D7212GV3 Program Entry Guide (P/N: F01U170808) for additional information about AC Fail
Time and UL 864 requirements.
3.1.2

Installing the Transformer

NOTICE!
Do not short-circuit the terminals of the transformer: Shorting the terminals opens the
internal fuse, causing permanent failure. Connect the transformer to Terminals 1 and 2 of the
control panel before plugging it into the power source.
1.
2.
NOTICE!
Always connect the battery first and then plug in the transformer.
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.
NOTICE!
Check with the Authority Having Jurisdiction (AHJ) about mounting transformers on specific
circuits.
F.01U.167.105 | 02 | 2010.11
Use 1.22 mm (18 AWG) wire (minimum) to connect the transformer to the control panel.
The wire length should be as short as possible. The maximum length is 15 m (50 ft).
Connect the battery and plug in the transformer.
Route telephone 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. Route data wiring
away from AC and telephone wiring.
Connect the battery. Refer to Section 3.2.2 Installing the Battery, page 17.
Plug the transformer into an unswitched, 120 VAC 60 Hz power outlet only.
Secure the transformer to the outlet with the screw provided.
UL Installation Instructions
Control Panels
Bosch Security Systems, Inc.