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Single Zone Call Controller With Relay & Optional Onboard Battery Backup


SKU: d3a0d4386e59 Categories: , Brand:


  • A single zone call controller c/w a 12V 140mA PSU and standby battery.
  • Compatible with C-TEC’s entire range of 800 Series Call System components.
  • Capable of indicating standard (constant tone) and emergency (intermittent tone) calls.
  • Includes a volume adjustable sounder and a link-selectable Call Accept/Reset button.
  • Power On and Alarm ‘CALLING’ LEDs.
  • Volt-free relay output for the optional connection of externally powered beacons, etc (relay activates on active call signal).
  • Standby battery provides up to 24 hours standby and 15 minutes alarm running time.
  • Mounts on a standard UK 25mm double gang flush or surface back box.
  • Also available as part of the NC951 Accessible Toilet Alarm Kit.


  • Mains Supply : 230V 50/60Hz (23mA max. current). 50Hz frequency
  • Internal Power Supply : 12V d.c
  • Total Output Current Limited To : 140mA
  • Quiescent Current : 0mA (none)
  • Max Battery Size And Type :
    • No Battery Backup (NC942) : None
    • Onboard Battery Backup (NC943B) : Includes an onboard 500mA battery back up facility providing 24 hours standby and 15 minutes alarm running time
  • Alarm Current : Determined by the number/type of field devices connected to the call controller/system
  • Auxiliary Relays : Includes one set of volt free relay contacts (NO/C/NC). Relay activates when a call is received by the controller. Rated at 30V d.c. @ 1A
  • Open Collector Outputs : None
  • Indicators : Red Alarm LED; Green Supply Present LED (flashes green when standby battery is active)
  • Controls : Adjustable volume control; Disable standby battery; Link-selectable Call Accept/Reset button. When Accept is selected indicators on relevant field devices will activate intermittently to reassure users help is on the way
  • Connections : -Ve (common -Ve terminal for all devices); +Ve (+12V nominal supply for powering emergency call points, overdoor lights, etc.); Signal (the trigger line which activates the NC943B)
  • Expansion Connections : None
  • Call Acknowledgement Functionality : Yes
  • Product dimensions (mm) : 147 W x 87 H x 34 D mm. Mounts on a standard 25mm UK double gang back box
  • Construction & Finish : Plastic
  • IP Rating : IP30
  • Weight : 294g
  • Operating Conditions/Temperature : -5ºC to +40ºC. Max. relative humidity 95% non-condensing


Additional information

Weight 0.3 kg
Battery Back-Up

No, Yes


Device Type

System Type