D9412GV4/D7412GV4 v2.03 | Installation and System Reference Guide | 17.0 Approved Applications
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Bosch Security Systems, Inc. | 7/16 | F01U265457-09 91
17.4.5 Other Devices.
17.4.2 Two-Wire Smoke Detectors
Two-wire smoke detectors connect to the
control panel only through the D125B Powered
Loop Interface. Two-wire detectors must be
evaluated for electrical compatibility, and be
UL Listed for use with the control panel. Refer
to Two-wire smoke detector compatibility table
on page 84 for the two-wire smoke detectors
that are UL Listed for compatibility and the
maximum number of detectors that can be
connected to each loop of the D125B Powered
Loop Interface Module.
You can also consult the smoke detector
manufacturer to determine if a particular
smoke detector is UL Listed for use with the
D9412GV4 and D7412GV4 Control Panels. The
Reset Sensor command is available from the
keypads when Reset Sensor is enabled.
Consult the UL Listed Two-Wire
Smoke Detectors Compatible with
the D125B table on page 84 to
determine which product best fit
your smoke application needs.
The control panel does not support
multiple detectors in alarm. The
control panel is intended to handle
detectors with optional features.
Detectors from different
manufacturers cannot be mixed on
the same circuit.
17.4.3 Two-Wire Smoke Detector
Specifications
Voltage Range: 8.0 VDC to 14 VDC
UL Compatibility Identifier: Type A (for
control panel, detector, and base)
17.4.4 NFPA Style A (Class “B”) Circuit
Loops A and B on the D125B Module are NFPA
Style A (Class “B”) initiating circuits suitable for
connecting any fire alarm initiating device,
including two-wire and four-wire smoke
detectors. To connect initiating devices to on-
board points (1 through 8) on the
D9412GV4/D7412GV4 v2.03 Control Panel:
Use a D125B Powered Loop Interface
Module with two-wire initiating devices
for a D9412GV4/D7412GV4 v2.03
Control Panel).
Use a D129 Dual Class “A” (NFPA Style
D) Initiating Circuit Module with any
type of initiating device, except a two-
wire smoke detector.
Use the following guidelines when connecting
fire alarm initiating devices to off-board points:
Do not connect two-wire smoke
detectors to POPITs or MUX bus inputs.
Use the D9127U or D9127T POPIT
Modules to connect four-wire smoke
detectors when using a
D9412GV4/D7412GV4 v2.03 Control
Panel.
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