Duct smoke detection in low-flow air handling systems often calls for a pendant-mounted head. The System Sensor B114LPBT is the 24VAC/DC plug-in base that makes this possible with the 2151 Special Applications Duct Smoke Detector. It is designed for 4-wire systems and includes terminals for alarm and supervisory relays and a remote annunciator.
Key Features
- 24 VAC/DC system voltage for 4-wire applications
- Form A and Form C alarm relay contacts plus a Form A supervisory relay
- Terminals for remote annunciator and remote test coil connections
- Twist-in/twist-out head for quick cleaning and maintenance
- Mounts to 4" square, 4" octagon or 3 1/2" octagon boxes (1.5" min. depth)
Specifications
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Manufacturer: System Sensor
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Part Number: B114LPBT
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System Voltage: 24 VAC/DC, 60 Hz
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Relay Ratings: Form A 2.0 A @ 30 V AC/DC; Form C 2.0 A @ 30 V AC/DC, 1.0 A @ 125 VAC
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Standby Current: 25 mA typical @ 24 V (base and detector)
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Alarm Current: 75 mA typical @ 24 V (base and detector)
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Operating Temperature: 32°F to 120°F (0°C to 49°C)
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Humidity: 10%–93% RH
Compatibility
For use with the System Sensor 2151 Special Applications Duct Smoke Detector (installation instructions also list 1151 and 2151T heads). With the B114LPBT, the 2151 is certified to UL 268A for no-flow/low-flow air handling systems at air velocities of 0–3,000 FPM.
FAQ
Which detector head does the B114LPBT take?
It is used with the System Sensor 2151 Special Applications Duct Smoke Detector; the installation instructions also list the 1151 and 2151T heads.
What system voltage does it need?
24 VAC/DC for 4-wire systems.
What relay contacts does it provide?
Form A and Form C alarm relays rated 2.0 A at 30 V AC/DC (Form C also 1.0 A at 125 VAC), plus a Form A supervisory relay.
What boxes does it mount on?
4 in. square, 4 in. octagon or 3 1/2 in. octagon boxes with 1.5 in. minimum depth.
