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4Channel Dry Contact Closure over Optical Fiber Modem
BD-OP-SER optical contact fiber modem provide 1-4channel switch.

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  • BD-OP-SER dry contact closure fiber modem is based on the integrated circuit;
  • BD-OP-SER optical contact fiber modem input switch normally open and close automatically, when the input state, switch output that is why state, convenient opening.
  • The switch quantity of other switch state stability in the boot state or fiber no access, no chaos motion state.
  • Provide 1~4 channel dry contact; also support 1~2 bi-directional dry contact.
  • A switch interface lightning reaches IEC61000-4-5 (8/20 μ S) differential mode: 6KV, impedance (2); common mode: 6KV, impedance (2) standard;
  • The optional AC 220V, DC -48V, DC +24V, DC power supply positive and negative pole points (this device supports only DC +5V supply).

Fiber Interface

  • Optical interface: SC/FC
  • Optical core: single fiber
  • Optical Wavelenth:  1310 nm/1550nm
  • Sending consumption:  -8dBm/-14dBm
  • Receiving and dispatching module:>-6dBm
  • Optical receiver receiving sensitivity: <-33 (BER<10 -10):
  • Dynamic range receiving: >-30dB
  • Optical code: NRZ
  • Transmit distance: single mode with 20KM. multi-mode with 2km

Dry contact

  • Response time: <2ms
  • Delay time: 0.5ms
  • Switch signal: 30VDC/0.5A
  • Connector: RJ45
  • Frequency response: 20HZ/S

Power supply                         

  • DC5V
  • Power Consumption:  <=3 Watts

environment condition                   

  • Operating temperature:  0C~+50 C
  • Storage temperature:   -20 C~+70 C
  • Relative temperature:95% (uncondensed)


  • 103mm(L)
  • 93mm(W)
  • 28mm(H)


4channel dry contact closure fiber modem application

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