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Technical Specifications
Environmental Considerations
Complies with EN50131 Environmental Class II, Security Grade 2
Relative Humidity: Up to 95% non-condensing
Up to 85% for UL installations
Temperature (operating): -10°C to +49°C (+14°F to +120°F)
For UL Listed product installations, 0°C to
+49°C (+32°F to +120°F)
Mechanical Properties
Color: White
Dimensions: 2.5 cm x 6.4 cm x 3.2 cm
(1.0 in. x 2.5 in. x 1.25 in.)
Material: High-impact ABS plastic
Outputs
Sounder
Sound Pressure
Level:
85 dB at 3 m (10 ft)
Tamper: Normally-closed (NC) contacts (with cover on) rated at
28 VDC, 125 mA maximum. Connect to detector tam-
per circuit.
Power Requirements
Power Draw: 40 mA maximum at 12 VDC with sounder activated
Voltage (input): 12 VDC nominal
Ordering Information
ISM‑BLA1‑SM Blue Line Sounder Module
Fits all Blue Line detectors
ISM-BLA1-SM
B328 Gimbal‑mount
Bracket
Mounts on a single-gang box and allows rotation of a
detector. Wires are hidden inside.
Ordering Information
B328 Gimbal‑mount Bracket
Mounts on a single-gang box and allows rota-
tion of a detector. Wires are hidden inside.
B328
www.boschsecurity.com Bosch Security Systems B.V.
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