Flashers and Tower Lighting Controls Tower and Obstruction Lighting Controls SCR9L Universal Lamp Alarm Relay Description The SCR9L is a universal lamp alarm relay designed to sense the failure of flashing or steady LED beacon lamps or obstruction lamps. The SCR9L energizes when one or more lamps fail. It will monitor the operation of one to eight beacon or obstruction lamps. All monitored lamps must be the same wattage and voltage. When connected to a site monitoring system, it provides the remote lamp monitoring protection required by the FAA-AC No: 150/5345-43E. Operation When a lamp fails, the SCR9L senses a decrease in current flow. After a 10s trip delay, the onboard LED glows and the two alarm outputs energize. The outputs and the LED are reset when the failed lamps are replaced and the unit is recalibrated. The SCR9L will sense an open flasher, it will not sense a continuously ON asher (see FB Series). Rfl emoving input voltage de-energizes the output and the LEDs. It does not change the calibration. Wiring Diagram Features & Benefits BEACON LAMP CONNECTION DIAGRAM FEATURES BENEFITS L1 N/L2 Designed for use with all types of LED beacon and Self calibrating obstruction lamps Failsafe beacon Relay will also provide an alarm signal on a failed monitoring flasher (open) Number of lamps User selection allows quick set up and easy monitored is switch adaption to multiple applications selectable up to 8 Universal voltage Designed for use in most applications 120 to 230VAC Provides remote beacon monitoring when Isolated, 10A, SPDT V = Voltage connected to a site monitoring system, as is alarm output contacts required by the FAA B = Beacon Lamps SS = Selector Switch Provides visual relay status of operation, alarm, trip LED indication L = LED Indicator delay, and calibration F = Flasher OBSTRUCTION LAMP Fully encapsulated Protects against shock, vibration, and humidity AXL = Auxiliary CONNECTION DIAGRAM Load/Alarm L1 N/L2 OL = Obstruction Lamps SI = Sensor Input Accessories H = 3 Spare AC Hot C103PM (AL) DIN Rail Connection (2A max.) 35 mm aluminum DIN rail available in a 36 in. (91.4 cm) length. P1023-20 DIN Rail Adapter Allows module to be mounted on a 35 mm DIN type rail with two 10 screws. 2016 Littelfuse Protection Relays & Controls Rev: 1-A-062316 www.littelfuse.com/scr9LFlashers and Tower Lighting Controls Tower and Obstruction Lighting Controls SCR9L Calibration Indicator Table Alarm relays must be calibrated at initial installation and when LED lamps are replaced. Due to LED lamp aging, recalibration is L Green Input ON & Calibrated recommended every 12 months. L Green Flashing Trip Delay 1. Remove input voltage L Red Lamp Failure 2. Move calibration switch to off position L Red/Green Flashing Calibrating 3. Re-apply input voltage L Red Flashing Not Calibrated 4. LED will flash red to indicate the unit is ready for calibration 5. Visually inspect structures lighting to make sure all lamps and flashers (if used) are operating properly Specifications 6. Remove input voltage Sensors 7. Adjust lamp selector switches for the correct number of Calibration Range lamps to be monitored (see adjustment diagram below) (total all Lamps) 150mA - 8.0A 8. Re-apply input voltage Absolute Max Current (total all Lamps) 15A max. (may not calibrate above 8A) 9. LED should flash red Single Lamp Current 150mA - 8.0A (total all lamps < 8.0A) 10. Move calibrate switch to ON position Time Delay 11. The LED will alternate flashing red and green Trip Delay Factory fixed 10s Input 1 2. LED will glow steady green within 30 secs. Input Voltage/Tolerance 120 to 230VAC 15% Calibration is complete AC Line Frequency 50/60Hz Calibration Failed Output To operate a spare lamp or alarm If the LED double blinks red, calibration failed. Remove input Line Voltage Output (SPNO) 5A 240VAC or 30VDC resistive voltage and repeat steps 6-8. 1/4 hp 125VAC 1/2 hp 250VAC Notes: Isolated Alarm Output (SPDT) 10A 240VAC or 30VDC resistive a. Monitoring a mixture of LED beacons and LED obstruction 1/4 hp 125VAC 1/2 hp 250VAC Auxilliary Input Voltage (H) 2A 230VAC lamps is not possible with the SCR9L. Mechanical b. This alarm relay is not designed to monitor Mounting One 10 (M5 x 0.8) screw incandescent lamps. Dimensions H 76.7 mm (3) W 51.3 mm (2.02) c. Applying input voltage when the calibrate switch is in the D 41.7 mm (1.64) OFF position, erases the previous calibration settings. The Termination IP20 screw terminals for up to 14 AWG LED will flash Red. The output relays are OFF and the unit 2 (2.45 mm ) wire or two 16 AWG will not sense lamp failures. 2 (1.3 mm ) wires d. Only one temperature compensated LED beacon can Protection be monitored with this product. A combination of Circuitry Encapsulated temperature compensated and standard LED beacons Environmental cannot be monitored. Operating / Storage Temperature -40 to 60C / - 40 to 85C Weight 3.9 oz (111 g) Adjustment Example SCR9L 7. OFF ON Example Shown: SCR9L two lamps are ON during normal operation. 2016 Littelfuse Protection Relays & Controls Rev: 1-A-062316 www.littelfuse.com/scr9L