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NC943B Single Zone Call Controller (12V 140mA PSU)

£96.72 exc. vat

Product Information

Single Zone Call Controller c/w 12V 140mA PSU


  • 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 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.

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