Bosch D9412GV2 User Manual download pdf (Page 26)

D9412GV2/D7412GV2 | Operation and Installation Guide | 6.0 Power Outputs

26 Bosch Security Systems, Inc. | 5/05 | F01U003641B

6.4.2 Terminals 6 and 7

When activated, Terminals 6 (Relay A) and 7 (Relay

B), provide positive (+) 10.2 VDC to 13.9 VDC power

output. Use the power at Terminals 6 and 7 to power

bells, siren drivers, piezoelectric fire sounders,

electronic horns, or other devices.

Programming determines the format of the output and

the conditions that activate it. One PTC protects

Terminals 6, 7, and 8 against shorts.

Available Power

The system combines the 1.4 A of primary power

produced by the power supply with the secondary

power source (the battery) to produce a total of 2.0 A

of alarm power at 10.2 VDC to 13.9 VDC. Terminals 6

and 7 share the available alarm power.

Power Restricted for Fire and Combined Fire and

Burglary Systems: Fire systems are prohibited from

using the battery for determining alarm power. Use the

fire system power formula that follows to calculate the

current available for fire and combined fire and

burglary systems.

6.4.3 Fire System Power Formula

To calculate the current available at Terminals 6 and 7

for fire and combined fire and burglary systems:

1. Add together the current draws for all devices

connected to Terminals 3, 8, 24, and 32, and the

accessory connector. This is the total current

required for the normal standby condition (NSC).

2. The current available for NSC is 1.4 A. Subtract

the NSC current required calculated in Step 1 from

the NSC current available, 1.4 A. The difference is

the alarm current available for Terminals 6 and 7.

In formula format:

1.4 A − NSC current required

(Step 1)

Alarm current

available

Refer to the D9412GV2/D7412GV2 Approved

Applications Compliance Guide (P/N: F01U003639) for

module or accessory current requirements.

6.4.4 Terminal 8

Terminal 8 provides continuous positive (+) 10.2 VDC

to 13.9 VDC power. Relay C interrupts the power at

Terminal 8 when activated. Use Terminal 8 to power

smoke detectors or other devices that are reset by

interrupting power. One self-resetting circuit breaker

protects Terminals 6, 7, and 8 against shorts.

Verification/Reset Relay

The default program sets Relay C (Terminal 8) as a

verification and reset relay. Refer to Relay Parameters

and Point Assignments in the D9412GV2/D7412GV2

Program Entry Guide (P/N: F01U003636) for instructions

on programming verification and reset relays and

points.

Performing a sensor reset at a keypad produces a five-

second relay activation of verification/reset relays. The

control panel ignores verification/reset points during

the five seconds.

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Bosch D9412GV2 User Manual Page 26

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