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Clear-Com 4-Wire Adapter Board For KB and HB Series

Part Number: Clear-Com EB7-4W

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Clear-Com 4-Wire Adapter Board For KB and HB Series

Clear-Com’s EB7-4W 4-Wire Option module can be added to the KB-702, KB-702GM, KB-701, and HB-702 products. This option allows the speaker or headset station to be operated over longer distances than are possible with a standard Clear-Com intercom line. This option can also be used to connect with fiber optic transmission equipment. The EB7-4W 4-Wire Option module connection is a transformer-isolated, audio-only connection and does not convey the call signal. The module also requires local powering.

Two-channel stations can have two separate 4-wire connections with this option. The Channel Switch on the front panel selects which channel is connected.


  • Input Impedance: >=5K?
  • Max Level before Clipping: >=10dB
  • Output Impedance: <=600?
  • AC Input Voltage Range: 14-20 VAC
  • DC Input Voltage Range: 20-30 VDC
  • Input Current (Max): <= 15mA (excluding KB/HB station current)

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