Bosch D1255RB Installationsanleitung PDF herunterladen (Seite 23)

D9412GV2/D7412GV2 | Operation and Installation Guide | 5.0 Power Supply

Bosch Security Systems, Inc. | 7/09 | F01U003641-04 23

5.0 Power Supply

5.1 Primary Power Terminals 1 and 2

5.1.1 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 4.5 Connecting Earth Ground on page 16.

AC Power Failure

The system indicates an AC power failure when

Terminals 1 and 2 do not have power. The AC Fail

Time program item 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

D9412GV2/D7412GV2 Program Entry Guide

(P/N: F01U003636) for additional information about

AC Fail Time and UL 864 requirements.

5.1.2 Installing the Transformer

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. 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.

2. 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.

Always connect the battery first and then

plug in the transformer.

3. Connect the battery. Refer to Section 5.2.2

Installing the Battery on page 24.

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.

D8004 Transformer Enclosure Required for Fire

Systems: Use the D8004 Transformer Enclosure for

the D1640 Transformer in fire and combined fire and

burglary applications.

Check with the Authority Having

Jurisdiction (AHJ) about mounting

transformers on specific circuits.

5.2 Secondary Power Terminals

5.2.1 Secondary (DC) Power

A 12 V sealed lead-acid rechargeable battery (D126)

supplies secondary power for auxiliary and alarm

outputs, and powers the system during interruptions

in primary (AC) power.

Use Lead Acid Batteries Only: The

charging circuit is calibrated for lead-acid

batteries. Do not use gel-cell or nicad

batteries.

Extra Batteries Increase Back-up Time: To

increase battery back-up time, connect a second 12 V

battery in parallel to the first battery. Use a D122 Dual

Battery Harness to ensure proper and safe

connection. Refer to the Standby Battery and Current

Rating Chart in the D9412GV2/D7412GV2 Approved

Applications Compliance Guide (P/N: F01U003639)

for battery standby time calculations.

Caution: When connecting two D1218

Batteries to the control panel, both must

have the same capacity (use two 17.2 Ah

batteries or two 18 Ah batteries).

D1218 Battery

The D1218 is a 12 V, 18 Ah battery for use in

applications requiring extended battery standby time.

Up to two D1218 batteries can be connected when

used with a D122 Dual Battery Harness.

When using two D1218 batteries, use a

separate enclosure, a D122L Dual

Battery Harness, and long leads.

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