Bosch Appliances Home Security System D7212G User Manual

Page 30

© 2003 Bosch Security Systems

4998138544C

D7212G

5.4.2

Optional Relays Required

Install an optional D136 Plug-in Relay into the ALT ALARM socket to enable
the output at Terminal 7. Install a D136 in the SW AUX socket to enable the
output at Terminal 8. The relay sockets are under the faceplate as shown in
Figure 7.

Relay Installation

Power down the system before inserting the D136 relays. The plug-in relays are
shorter than the sockets they plug into. See Figure 7. They can be installed in
either the left or right end of the socket.

Don’t rely on relay labelling:
Don’t rely on the labeling to install D136 relays. Check for the side with three
pins. The three pins go on the top side of the socket.

Incorrect insertion does not damage the relay or the system, however the
related circuits do not function properly.

5.4.3

Terminals 6 and 7

Terminals 6 (Relay A) and 7 (Relay B), provide positive (+) 10.2 VDC to 13.9
VDC power output when activated. Use the power at Terminals 6 and 7 to
power bells, siren drivers, piezo 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 to 13.9 VDC. Terminals 6 and 7 share the available alarm power.

Power restricted for fire and combined fire/burglary systems:  Fire systems are prohibited from using the battery for
determining alarm power. Use the Fire System Power Formula below to calculate the current available for fire and combined
fire/burglary systems.

5.4.4

Fire System Power Formula

To calculate the current available at Terminals 6 and 7 for fire and combined fire/burglary systems:

1.

Add together the current draws for all devices connected to Terminals 3, 8, and 32. This total 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 D7212G Approved Applications Compliance Guide (P/N: 4998138560) for module/accessory current
requirements.

5.4.5

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/reset relay. See Relay Parameters and Point Assignments in the
D7212G Program Entry Guide (P/N: 4998138538) for instructions on programming verification/reset relays and points.

Performing a Sensor Reset at a command center produces a five second relay activation of verification/reset relays. The panel
ignores verification/reset points during the five seconds of relay activation.

Power Outputs