Programmable Power Output Terminals 6, 7, And 8; Programming; Terminals 6 And 7; Fire System Power Formula - Bosch D9412GV3 Operation And Installation Manual

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6.4 Programmable Power Output
Terminals 6, 7, and 8
6.4.1

Programming

The power outputs at Terminals 6, 7, and 8 are
programmed as Relays A, B, and C. All relays are
programmed in the Relays section.
Relays are assigned a relay type, (Fire Bell, for
example) when they are assigned to an area. Relays
can be assigned to one or more areas.
The Bosch Security Systems, Inc. defaults set Relay
A (Terminal 6) as a Steady Alarm Bell output, Relay B
(Terminal 7) as a Pulsed Fire Bell output, and Relay C
(Terminal 8) as a Verification or Reset output for
smoke detectors. The D9412GV3/D7412GV3
Program Entry Guide (P/N: F01U170807) contains
complete instructions for programming relays. Refer
to Sections 6.4.2 Terminals 6 and 7, 6.4.3 Fire
System Power Formula, and 6.4.4 Terminal 8 on
page 27 for descriptions of the functions of each
terminal.
Refer to the Bell Parameters section of the program to
set the Fire Bell, Alarm Bell output responses for
relays. Four annunciation patterns are available:
Steady, Pulsed, California Standard, and Temporal
Code 3.
Voltage Output at Terminals 6, 7, and 8
If Terminals 6, 7, and 8 do not provide the expected
output, check:

Programming for Relays A, B, and C in the relays
section of the program.

Bell Parameters section of the program to confirm
that the Alarm and Fire Bell responses are
programmed for the expected duration and
pattern.

Point Assignments section to confirm that each
point is programmed for the expected local
response.
6.4.2

Terminals 6 and 7

When activated, Terminals 6 (Relay A) and 7 (Relay
B), provide positive (+) 12.0 VDC Nominal 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 self-resetting circuit
breaker protects Terminals 6, 7, and 8 against shorts.
When using Relay A or Relay B to activate notification
appliance circuits in UL Listed fire alarm applications,
install a D192G Indicating Circuit Module.
Bosch Security Systems, Inc. | 10/10 | F01U143070-03
D9412GV3/D7412GV3 | Operation and Installation Guide | 6.0
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)
Refer to the D9412GV3/D7412GV3 Approved
Applications Compliance Guide (P/N: F01U143069)
for module or accessory current requirements.
6.4.4

Terminal 8

Terminal 8 provides continuous positive (+) 12.0 VDC
Nominal 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 and 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
D9412GV3/D7412GV3 Program Entry Guide
(P/N: F01U170807) for instructions on programming
verification and reset relays and points.
Performing a sensor reset at a keypad produces a
five-sec relay activation of verification and reset
relays. The control panel ignores verification and
resettable points during the five sec.
Power Outputs
= Alarm current
available
27