Bosch Appliances D7212G Power Outputs, Don’t rely on relay labelling, Relays for Terminals 7 and

D7212G

Power Outputs

5.4.2Optional 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.

TOP

L

E

F

T

ALT ALAR M

SW AUX

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

5.4.3Terminals 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

NOTE:

The D136 Relays are inserted with the three pins towards the TOP side.

GND START

BOTTOM

Figure 7: Relays for Terminals 7 and 8

and Ground Start

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.

5.4.4Fire 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.

5.4.5Terminal 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.

D7212G Operation and Installation Guide

4998138544C Page 30 © 2003 Bosch Security Systems