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  Edwards Signal ED-EC50R Reflective Beam Smoke Detector
Edwards Signal ED-EC50R Reflective Beam Smoke Detector


Our Price : $1,068.89

Product Code: ED-EC50R


The EC-50R/-100R comprises a transmitter and receiver in a single enclosure and is usually installed between 19 inches and 24 inches below the ceiling. The transmitter emits an invisible infrared light beam that is reflected via a prism mounted directly opposite and with a clear line of sight. The reflected infrared light is detected by the receiver and analyzed. Smoke in the beam path will reduce the received infrared light proportionally to the density of the smoke. The detector analyzes this attenuation or obscuration of light and acts accordingly. Detectors are typically mounted within 30 feet (9.14 m) of a potential fire source. Consult your Authority Having Jurisdiction for spacing requirements specific to your locality.

Alarm Threshold: Alarm thresholds of 25%, 35% and 50% obscuration can be selected to suit the environment, with 25% the most sensitive setting. The factory default setting is 35 percent and is used for most typical applications. If the received infrared signal reduces to below the selected threshold for approximately 10 seconds, the fire relay is activated.

Fire Alarm: There are two modes to the operation of the fire relay. Auto reset mode will reset the fire relay 5 seconds after the received infrared signal has recovered to a level above the Alarm threshold. Latching mode holds the fire relay active indefinitely after an Alarm condition has occurred. To clear the latched mode, power must be removed from the Detector for a minimum of 5 seconds.

Trouble Alarm: If the infrared beam is obscured rapidly to a level of 90% or greater for approximately 10 seconds, the Trouble relay is activated. Typical causes of trouble include an object being placed in the beam path, transmitter failure, loss of the prism, or sudden misalignment of the detector. The Trouble relay will reset within 2 seconds of the trouble being cleared.

Automatic Gain Control (AGC): The Detector monitors long term degradation of signal strength caused by component aging or build up of dirt on optical surfaces. By comparing the received infrared signal against a standard every 15 minutes, the detector automatically compensates for signal differences of less than 0.7dB/hour. When the detector is showing AGC fault, detector is still capable of generating an alarm, and will display both Alarm and Trouble indications.

Ground Level Test Station: The optional Ground Level Test Station facilitates testing of a connected detector from safe and convenient location. The unit is key-operated with a two-position Test/Run switch and includes two dedicated LEDs: one for Alarm indication and one for Power indication.

When the test station key is inserted and turned to the Test position, the Power LED flashes to indicate that power is connected and that the 2-wire data link cable is correctly installed. After several seconds in the test position, the test station initiates an alarm at the detector head, which is indicated by the red LED on the detector and the Alarm
LED on the test station. Test mode automatically times out after 20 seconds at which time the detector returns to standby mode, regardless of the test station keyswitch position.

Connection between the test station and the detector is made by means of a 2-wire data link cable. The test station requires a 10.2 - 30 Vdc power connection.

Test Filter: A test filter is supplied with the detector, which is used to verify the alarm threshold. See the installation sheet for details on testing and calibration.

Engineering Specification:

The projected beam type smoke detector shall be a 4-wire 12/24 Vdc device to be used with UL listed 4-wire control panels. The unit shall be listed to UL 268 and shall consist of an integrated transmitter and receiver. The beam detector shall operate between a range of 15 and 160 feet (4.57 and 48.77 m). It shall feature automatic gain control, which will compensate for gradual signal deterioration due to dirt accumulation on the lenses. The unit shall include a wall mounting bracket. Testing shall be carried out using a calibrated test filter. It shall be possible to test the detector without direct access to it by means of a remotely installed key-operated test station.


Power Supply: 10.2 Vdc to 30 Vdc (continuous power)
Standby Current Alarm/Trouble Current: Less than 4 mA, Less than 14 mA
Contacts Alarm Trouble: Normally Open, rated 2A, 30 Vdc, resistive, Normally Closed, rated 2A, 30 Vdc, resistive
Alarm and Trouble Signal Delay: 10 seconds
Power Down Reset Time: >5 seconds
Dimensions (HxWxD): 8.25 in x 5.1 in x 4.7 in (21 cm x 13 cm x 12 cm)
Weight: 1.5 lb (0.68 kg)
Operating Environment, Temperature, Humidity: 32 F to 100 F (0 C to 37 C) 93%RH, Non-condensing
Beam Coverage Width Length: 30 ft (9.14 m) either side of beam, EC-50R: 15 ft to 160 ft (4.57 m to 48.77 m) EC-100R: 160 ft to 330 ft (48.77 m to 100 m)
Alarm Thresholds: 2.50dB (25%), 3.74dB (35%), 6.02dB (50%) obscuration
Optical Wavelength: 880nm
Agency Listings: UL, ULC, CE
  • Coverage: 50R range 15 -160 ft (4.6 - 48.8 m); 100R range 160- 330 ft (48.8 - 100 m)
  • Microprocessor controlled
  • Automatic drift compensation
  • Simple alignment
  • Selectable alarm thresholds
  • 24 Vdc operating voltage
  • Latching or non-latching operation
  • Low current consumption
  • Optional Ground Level Test Station

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