FB SERIES

2019-05-23
The FB Series is used to monitor the operation of one twolamp

incandescent beacon and one beacon flasher (or auxiliary

module). The flasher and lamps are monitored by sensing the

flow of current in the circuit. If the lamp(s) or the flasher fail to

operate properly, a solid-state output and an isolated SPDT relay

energize. When connected to a site monitoring system, this

unit provides the remote beacon monitoring protection required

by the FAA/FCC. On a multiple beacon structure, one unit is

required for each two-lamp incandescent beacon (one unit per

beacon for LED beacons).

Operation

If one lamp in an incandescent beacon fails, the relay and solidstate

lamp failure outputs energize after 10s. If the flasher fails

in the ON or OFF condition, the relay and the solid-state flasher

failure output energizes after 6s. If both failures occur, all three

outputs energize after their trip delays.

Note: If both incandescent lamps fail, all three outputs will

energize. The relay and solid-state flasher failure output

energizes after 6s, and the solid-state lamp failure output

energizes after 10s.

Littelfuse

FBFB SERIESFB120AFB230A

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Part#

Flashers and Tower Lighting ControlsFlasher &Incandescent Beacon Alarm Relay

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Datasheet

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Please see the document for details

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