CTR04A Control Box

CTR04A Control Box employs MCU IC control technology. With a pre-programmed software, CTR04A can control up to 4 aviation obstruction lights. When any light fail, the control box will send a alarm signal to alarm device in BTS in order for maintaneance staff to replace the light immediately.

if needed, it can turn on all light in the system and make them flash at the same time. (Control box that can control more than 4 lights are also available upon request).

A photocell is included with the control box, which can turn on/off the system at dawn/dusk. The photocell should be installed in open environment. CTR04A added a extra surge protection than CTR04. The surge protector can risist up to 65KA, 2.2KV.

CTR04A Control Box
CTR04A Control Box


Description Parameter
Operation voltage AC110V~240V
Surge protector 65KA / 2.5KV
Power frequency 50Hz~60Hz
Power consumption Support up to 300W
Photocell sensitivity 30-70 lux (optional)°C
Flashing 20-60 times/min (optional)
Ambient temperature -30°C ~ +60°C
Size 350mmx300mmx120mm


  • All lights on / off lights simultaneously
  • Light failure indication, there are corresponding indicator shows when any light failed
  • Alarm signal output, can connect to other external alarm devices
  • A manual photocell switch, which can switch to manual control mode during installationing
  • PHC01 automatic photocell
  • The controller is indoor type (out-door type available upon request)


  • For Obstruction light system


  • ICAO : N/A
  • FAA : N/A

Wiring method

Please connect the power cord according to the label instruction

"Power" - controller power input Lamp1, Lamp2, Lamp3, Lamp4 - connect to aviation obstruction light separately

Lamp1 Alarm, Lamp2 Alarm, Lamp3 Alarm, Lamp4 Alarm - output alarm terminal

Photocell - photocell control terminal

NO:1, NO:2, NO:3, NO:4 are 4 aviation obstruction light indicators individully.

Green light means working fine. Red light AL1, AL2, AL3, AL4 means corresponding light has failed.

Please make sure all wiring job are correct. Connecting the power supply, then the controller will start to work

CTR04A installation sample


  • This product is based on "voltage detection" thoery, it can only send alarm when the internal power supply completely damaged. It is suggested that not to use this control box in high accuracy detection.
  • Verify whether the power cables are well connected before powering it on.
  • To avoid dangerous operation, please don't open any part of the controller while it's working.
  • Please use the product strictly according to the instruction above.
  • Reddot has a continuous product improvement policy, we reserve the right to change design and specifications without notice in advance.


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Products Accessories

(Aviation Obstruction Light)

low intensity Aviation Obstruction Light lit up large port equipment all over the world. In 2006, through our cooperation with experienced companies in England and South Africa,...

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