Description
5251RB System Sensor Heat Sensor, ROR – Analog
The model 5251RB System Sensor is intelligent sensors that utilize a state-of-the-art thermistor sensing circuit for a fast response. These sensors are designed to provide open area protection with 50-foot spacing capability. Model 5251B is a fixed temperature sensor with a 135°F fixed temperature alarm.
Model 5251RB System Sensor is a rate-of-rise temperature sensor with a 135°F fixed temperature alarm. Model 5251H is a high-temperature sensor with a 190°F fixed temperature alarm. Two LEDs on each sensor light to provide 360° visibility of the sensor indication.
The LEDs can be latched ON by code command from the panel for an alarm indication. The LEDs can also be unlatched to the normal condition by code command. Remote LED annunciator capability is available as an optional accessory
Specifications 5251RB System Sensor
- Diameter: 6.1 inches (155 mm) installed in B210LP; 4.1 inches (104 mm) installed in B501.
- Height: 2.0 inches (51 mm).
- Weight: 4.8 ounces (137 gm).
- Installation Temperatures: –4°F to 100°F (–20°C to 38°C); 5251B and 5251RB; –4°F to 150°F (–20°C to 66°C); 5251H.
- Operating Humidity Range: 10% to 93% Relative Humidity Non-condensing.
- Mounting: B210LP flanged base; B501 flangeless base; B501 with RMK400 recessed mounting kit.
- Voltage Range: 15 to 32 Volts DC Peak.
- Standby Current: 300 µA @ 24 VDC (one communication every 5 seconds with LED blink enabled).
- LED Current: 6.5 mA @ 24 VDC.
- Fixed Temperature Rating: 135°F (57°C); 5251B and 5251RB; 190°F (88°C); 5251H.
- Rate of Rising Detection: Responds to greater than 15°F/min.; 5251RB.
Datasheet 5251RB.
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