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Signaling Items

FAIL SAFE FLASHER (FSF) RELAY

SPECIFICATION NO. : RDSO/SPN/173/2002

RDSO APPROVED. : YES

DESCRIPTION :

Fail Safe Flasher is designed to work at 24V input with variation +30% to -10% ,giving flashing output of 24V DC ±20% at 3A with 50 ± 2 flashes per minute. Micro-controller is used to make the design of the flasher as fail safe so that no steady output is delivered in case of any failure.

 

TECHNICAL SHEET :

The electronic flasher device shall operate satisfactorily either from primary or secondary cells or unsmooth full-wave rectifier supply (true RMS) from single phase,50 Hz sinusoidal AC supply. The rated current, voltage and ambient temperature shall be as follows:-

  • Input voltage : 24V, +30%, -10%
  • Output voltage : 24V±20%
  • Output Current : 3Amps.
  • Flash rate : 50±2 flashes per minutes.
  • Duty cycle : 'ON' time for the flashing output shall be 44% to 46% of the duty cycle.
  • Operating temperature : -10°C to 70°C & 95% RH

The design of the circuit is of fail safe nature so that no steady output is delivered in case of failure or open circuit/short circuit or ageing of any component or any momentary switching OFF/ON of the power supply or external surges due to picking up and dropping of relays connected across the supply to the flasher device.

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We are an ISO 9001:2015 certified company. Our products are based on Railway/RDSO/IRS specification and are quality assured after extensive internal as well as third party inspection. We have appointed a team of quality analysts to keep a strict vigil on the quality of the products being manufactured right from raw materials to the finished production stage.

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