3H plug-in detectors are specifically designed to meet the stringent performance requirements of industrial and commercial fire detection/alarm systems. The design of these detectors emphasizes ease of installation and field maintenance. 3H 400 series(TM) plug-in smoke detectors are designed to meet the performance criteria designated by UL/ULC. The ion and photo units have a sensing chamber sealed from back pressure air flow, dirt, and insects. This chamber is protected by a fine mesh screen which can be cleaned or replaced. Additional key features include a recess mounting option, interchangeable ion, photo, or thermal detectors, a variety of mounting bases, and full line of optional accessories. All 400 series(TM) thermal rate-of-rise with fixed heat detector contains a unique dual thermistor heat sensing circuit to provide maximum performance and solid state reliability. The model 5451 is designed to initiate an alarm at 135 Fahrenheit and to respond to an increase in excess of 15 Fahrenheit per minute. This enables the heat detector to communicate an alarm to the central control panel prior to reaching the static set point for these high rates of rise (typically around 125 Fahrenheit to 130 Fahrenheit). Providing a timely response to both rapid and slow temperature increases. This model should be used in applications where rapid responses desired and where rapid temperature increases would only be caused by a fire emergency.
Specifications
- Operating voltage/alarm current: mounting base dependent
- Standby current:
- Photo/ion: 100uA maximum
- Thermal: 120uA maximum
- Sensitivity: 1.9%+/-. 6%/ft. Ion; 3.0%+/-. 7%/ft. Photo
- Weight: 0.3lb.(136gm)
- Size: 3.2"/8.1cm h.; 4.0"/10.2cm dia. unflanged base; 6.2"/15.8cm dia. flanged base
- Construction: flame retardant Noryl plastic
- Operating temperature: 32 Fahrenheit to 100 Fahrenheit(0 Celsius to 38 Celsius)
- Alarm point thermal: 135 Fahrenheit(57.6 Celsius) or 15 Fahrenheit/min. rate of rise
- Humidity range: 10-93%RH non-condensing
- Smoke detector spacing:
- For ion, photo, and photo/thermal detectors on smooth ceilings(as defined in NFPA 72), spacing of 30 feet(900sq. ft) may be used as a guide.
- For thermal detectors on smooth ceiling(as defined in NFPA 72), spacing of 50 feet(2500 sq. ft.) may be used.
- Other spacing may be used depending on ceiling height, high air movements, and other conditions or response requirements.
Features
- Low standby current
- Two visible LEDs "blink" in standby and provide a 360 Degrees field viewing angle
- Broad variety of mounting bases
- Easy plug-in of the head to base
- Field metering of detector sensitivity
- Field adjustable sensitivity
- Built-in test switch
- Built-in tamper-resistant feature
- Designed for direct surface or electrical box mounting
- SEMS screws for easy wiring
- Optional recess mounting
- Removable cover and insect screen for field cleaning
| Base model number | Version | Loop type | Current limit resistor | Alarm contact type | Nominal voltage | Current drew on alarm(mA) |
|---|---|---|---|---|---|---|
| B401B | UL/ULC | 2-wire | No | N/A | 12/24VDC++ | 10-100 |
| B401BR | UL/ULC | 2-wire | Yes | N/A | 24VDC | 10-62 |
| B402B | UL/ULC | 4-wire | Yes | Form A & C | 24VDC | 14-39 |
| B404B | UL/ULC | 4-wire | Yes | Form A & C + A supply | 120VAC | 75mA AC Max |
| B406B | UL/ULC/EN-54 | 2-wire | No | Form C | 24VDC | 12-100 |
| B401+ | UL/EN-54 | 2-wire | No | N/A | 12/24VDC++ | 10-100 |
| B401R+ | EN-54 | 2-wire | Yes | N/A | 24VDC | 10-62 |
Main Products
fire protection equipment including sprinkling system, ABC dry powder fire extinguishing agent, fire alarm system control panel, fire fighting system