Automatic fire alarm systems have firmly entered our lives, warning of a fire that has begun. But often people find fire before fire detectors. In this case, to manually start the alarm, special buttons are used - manual fire detectors.
Detector design
The IPR-3SU detector is a manual fire detector for activating the receiving device of an automatic fire alarm with radial loops. The sensor is designed for connection to a control panel with two-wire radial loops. When changing its state, the device changes the resistance of the signal loop. The detector is powered from the control panel via a signal loop. To bring the device into an alarm state, it is necessary to put the drive element in the on position. After that, the button is fixed in the alarm state. To return the detector to armed mode, press the button again. The device button is protected by a transparent cover that protects it from accidental pressing.
Structurally, the detector consists of a base and two covers - internal and external. To indicate the status, it is equipped with red and green LED indicators, indicating a blinking standby or alarm modes. Sensor body color is red.
Technical specifications
A universal solution for analog AUPS is a manual fire detector IPR-3SU. Sensor specifications are listed below:
- Contacts normally closed or open.
- Optical indication of work / alarm.
- Supply voltage 9-28 V.
- Standby current 0.1 mA.
- Alarm current 25 mA.
- The force of inclusion 12-18 N.
- The maximum dimensions are 90x105x50 mm.
- Weight - 110 g.
- Execution of the case IP41.
- Operating temperature - -40 .. + 50 degrees.
- Relative humidity 93%.
- The average life of 10 years.
- MTBF of 60,000 hours.
Detector Installation
Installation of fire protection devices is regulated by SP5.13130.2009. In accordance with this set of rules, the IPR-3SU manual fire detector must be installed at a height of 1.5 m from the floor level. Installation locations - exits from rooms, from floors, escape routes - at least every 50 meters. The sensor must be installed on the base of non-combustible material, at a distance of not less than a meter from heating appliances and electrical equipment. Fastening the base of the device to the bearing surface is carried out with screws, a diagram of the template for marking the surface is given in the passport for the manual fire detector IPR-3SU.
Device connection
The IPR-3SU manual fire detector will be connected to two-wire radial loops as normally closed or normally open sensors. To select one of the connection options in the sensor, jumpers are provided:
- Simulation of a smoke detector with normally closed contacts and the ability to acknowledge.
- Fire Smoke Detector Mode.
- Simulation of a fire sensor with an NC contact for a fire alarm.
- Loopback for alarm systems.
On the sensor board, there are two pads with screw terminals for connecting the signal cable wires and an additional current-limiting resistor. The resistance of the resistor is determined depending on the switching circuit and the control panel. The IPR-3SU manual fire detector must be connected to a signal cable that maintains its operability in a fire. For laying such loops, a fire-resistant cable line based on a cable in the execution of FR and metal cable-bearing elements is used.