Bosch Appliances D9412GV3 manual 5.0Power Supply, 5.1Primary Power Terminals 1 and, AC Power Fail

D9412GV3/D7412GV3 Operation and Installation Guide 5.0 Power Supply

5.0Power Supply

5.1Primary Power Terminals 1 and 2

5.1.1Primary (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 15.

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) for additional information about AC Fail Time and UL 864 requirements.

5.1.2Installing 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 22.

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.

5.2Secondary Power Terminals

5.2.1Secondary (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 D9412GV3/D7412GV3 Approved Applications Compliance Guide (P/N: F01U143069) for battery standby time calculations.

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.

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).

When using two D1218 batteries, use a separate enclosure, a D122L Dual Battery Harness, and long leads.

5.2.2Installing the Battery

1.Place the battery upright in the base of the enclosure.

2.Locate the red and black leads supplied in the literature pack.

Bosch Security Systems, Inc. 10/10 F01U143070-03 22