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15
Universal DC Low Intensity Obstruction Light
Single Light Fixture
ALARM RELAY OUTPUT
In normal operation the relay is energised
• Terminal contacts COMM and NC of the relay are electrically closed
• Terminal contacts COMM and NO of the relay are electrically open
Whenever the LED is not lit due to a power failure and/or a LED failure the relay will not be energised.
• Terminal contacts COMM and NO of the relay are electrically closed
• Terminal contacts COMM and NC of the relay are electrically open
For location details of the terminals please refer to Figure 2.
The alarm relay comes configured as follows:
• Relay normal operation (default, as described above)
The following alarm relay configurations are available as a special order. These must be specified at
the time of order:
• Relay inverse operation (inverse functionality of the normal operation, used to conserve power)
• Relay disable (in case the relay is not required, used to conserve power)
NOTE: The alarm relay is intended for low voltage (SELV) connection only.
NOT FOR MAINS CONNECTION
RS232 AND RS422/485 COMMUNICATION (OPTIONAL)
The Obstruction Light offers a RS232 and a R2422/485 interface.
RS232
Typical 3 pin TxD, RxD and GND arrangement
RS422/485
Typical 4 pin arrangement with Termination selection and Duplex/Halfduplex selection
For location details please refer to Figure 2.
Please contact AVLITE for further details.
Duplex
SW3
S1
S2
OFF OFF Simplex operation
ON
ON
Duplex operation
Termination
SW4
S1
S2
OFF OFF No termination
ON
ON
120 Ohm termination
