Power Outputs; Circuit Protection; Total Available Power; Continuous Power Output Terminals 3, 8, 24, And - Bosch D9412GV4 Installation And Operation Manual

D9412GV4/D7412GV4/D7212GV4 | Installation and Operation Guide | 6.0

6.0 Power Outputs

6.1

Circuit Protection

Three self-resetting circuit breakers protect the
control panel from short circuits on the
continuous and programmable power outputs. If
the control panel is programmed for power
supervision and a short circuit occurs on one of
the power outputs, the control panel sends
BATTERY LOW and BATTERY MISSING when
using Bosch Security Systems, Inc. Modem IIIa
communicator format. Under the same conditions
when using Contact ID communicator format, the
control panel sends Control Panel Battery Low
(302) and Control Panel Battery Missing (311).
One self-resetting circuit breaker protects:

Terminal 3: Auxiliary Power
 Terminal 24: Zonex Power
A short circuit on one terminal
disrupts power to the other terminal.
Another self-resetting circuit breaker protects:

Terminal 6: Alarm Power Output
 Terminal 7: Alternate Alarm Power Output

Terminal 8: Switched Auxiliary Power.
A short circuit on one of the terminals
disrupts power to the other two
terminals.
The third self-resetting circuit breaker protects
Terminal 32: Power +.
UL requires any device powered from
a power output to be supervised.
UL requires that power outputs are
not shared between fire and non-fire
devices unless all devices are in
conduit within 20 ft and are in the
same room.
6.2

Total Available Power

The system produces up to 1.4 A of combined
power at 12.0 VDC nominal for special
application use. The outputs listed below share
the available power. These outputs are shown as
red circles on the faceplate.
Bosch Security Systems, Inc. | 3/12 | F01U266054-01
Terminal 3 - Auxiliary Power: Use this terminal to
power devices requiring continuous power.
Terminal 6 (Relay A) - Alarm Power Output:
Programmable relay normally open, power on
alarm.
Terminal 7 (Relay B) - Alternate Alarm Power
Output: Programmable relay normally open,
power on alarm.
Terminal 8 (Relay C) - Switched Auxiliary Power:
Programmable relay normally closed, switches
power off when the Sensor Reset command is
2
executed.
Terminal 24 - Zonex Power: Use this terminal to
power Zonex modules such as the D8125,
D8128D, and D8129 Modules.
Terminal 32 – SDI Power +: Use this terminal to
power serial device interface (SDI) devices such
as keypads, the D9131A Parallel Printer Interface
Modules, or the D9210C Access Control Interface
Modules.
Terminal 36 – SDI2 Power +: Use this terminal to
power serial device interface (SDI2) devices such
as the B208 Octo-input Module, the B308 Octo-
output Module, the B420 Ethernet
Communication Module, and the B820 Inovonics
Interface Module.
Accessory Connector: The D928 Dual Phone Line
Switcher connects to the accessory connector.
6.3 Continuous Power Output
Terminals 3, 8, 24, and 32
The continuous current draw for powered devices
connected to Terminals 3, 8, 24, and 32, and the
accessory connector must not exceed 1.4 A.
Devices powered from these outputs operate at
12.0 VDC Nominal.
Power Restricted for Fire and Combined Fire and
Burglary Systems: Use the Fire System Power
Formula to calculate the current available for fire
and combined fire and burglary systems (refer to
Section 6.4 Programmable Power Output Terminals
6, 7, and 8).
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.
Power Outputs
30