Bosch D296 Application Manual page 13

Projected-beam Smoke Detectors
–
Relays
–
–
Functional
Alarm Response Selectivity: 5 sec or 30 sec
Operation:
Initialization
Signal Processing:
Test Features:
Mechanical
Coverage:
Dimensions (H x W x D):
Mounting:
Pattern Pointability:
Bosch Security System, Inc.
D297:
Alarm Output:
Tamper/Trouble
Output:
10.2 VDC to 15.0 VDC
One auxiliary Form C (NO/C/NC contact rated 1 A, 60 VDC
maximum
One NO contact rated 1 A, 60 VDC maximum
For resistive loads only; do not use with capacitive or inductive
loads.
One NC contact rated 1 A, 60 VDC maximum
For resistive loads only; do not use with capacitive or inductive
loads.
Opens when the cover is removed, power is lost, the beam is
blocked, or the signal is increased by 20% or more..
Transmitter emits an invisible pulsed infrared (IR) beam to the
receiver. If smoke obscures the beam beyond the selected
threshold, the receiver signals an alarm. If the beam is 90%
blocked, the receiver signals a trouble.
When initially powered up, the obscuration along the beam
path is measured and set as an initial reference point to which
self-compensating circuitry refers. If the system is powered
down and then repowered, this initialization step is repeated.
Therefore, do not use with systems incorporating an alarm
verification feature.
Automatic signal synchronization eliminates the need for a
synchronization wire.
Self-compensating circuitry compensates for signal loss from
dust or dirt buildup on lens and signals a trouble condition at a
signal loss of 50% or a signal increase of 20%.
Externally visible LEDs on the transmitter and receiver indicate
an alarm signal and trouble conditions. An output voltage on
the receiver assists in alignment and troubleshooting. The D306
Indicator Plate (included) uses LEDs to indicate detector status
and condition, and provides a point to read and test the signal
voltage.
30 ft to 350 ft (9 m to 107 m) range. Up to 60 ft (18 m) spacing
on smooth, flat ceilings.
7 in. x 5.5 in. x 5.5 in. (17.8 cm x 13.9 cm x 13.9 cm)
Surface or ceiling mount on NEMA 4 in. square or octagonal
electrical boxes or equivalent (not supplied)
Internally pointable; ±90° horizontal, ±10° vertical
Application Guide
Document Introduction | en
2013.02 | 02 | F.01U.500.951
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