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does the 755RB has voltage free contacts?

Yes they are voltage free contacts

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Key Features

  • Integral 2A Isolated voltage free changeover relay
  • Control/activate third party devices (i.e. lighting, security, or home automation systems)
  • Dry contact input for remote test/hush functions from a momentary switch
  • Suitable for use with 755PSMA2 and 755RLPSMA2 smoke alarms
  • Fast and easy installation
  • Interconnect up to 40 smoke alarms

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