Bosch D340, Installation Manual

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Duct smoke housing, 2-wire Wiring | en 15
Bosch Security Systems, Inc. Installation manual 2017.04 | 7.0 | F.01U.071.685
4 Wiring
The housing/detector is designed for a two‑wire loop power ranging from 8.5 VDC to 32 VDC.
For use with the D344-RT Remote test/indicator plate or The DRA-5 Remote indicator plate,
you must use an external 24 VDC/VAC that can supply a minimum of 170 mA. For terminals for
power wiring, see the following figure.
Figure 4.1: D340 terminal wiring
1 Optional external power (24 VAC/VDC) 2 Remote LED
3 Loop (+) 4 Loop (-)
4.1 Wiring to the D344-RT
Notice!
NFPA Requirement
NFPA-72 requires that where in‑duct smoke detector housings are installed in concealed
locations more than 10 ft (3 m) above the finished floor or in arrangements where the
detector’s alarm indicator is not visible to responding personnel, the detectors have remote
alarm indicators.
Notice!
Do not exceed 500 ft (152 m) between the D344-RT (D307) Remote test/indicator plate and
the D340 housing. Use 18 AWG (ISO 0.75 mm
2
) or larger wire.