C-TEC Conventional Single Zone Call Controller c/w 12V 140mA PSU (NC943B)

The C-TEC NC943B is a single zone call controller with a built-in 12V 140mA power supply and standby battery. It works with C-TEC's full range of 800 Series conventional call system components and is also part of the NC951 Accessible Toilet Alarm Kit. It indicates both standard calls (constant tone) and emergency calls (intermittent tone).

Key features

• Compatible with C-TEC's entire 800 Series call system range
• Indicates standard and emergency calls
• Volume-adjustable sounder
• Link-selectable Call Accept/Reset button; with Accept selected, indicators on field devices flash to reassure the user
• Power On and Alarm 'CALLING' LEDs
• Volt-free relay output for externally powered beacons and similar devices (activates on a call)
• 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

Technical specifications

• Mains supply: 230V 50Hz (23mA max)
• Internal power supply: 12V DC
• Total output current: limited to 140mA
• Standby battery: on-board 500mA back-up giving 24 hours standby and 15 minutes alarm
• Relay: one set of volt-free contacts (NO/C/NC), rated 30V DC at 1A
• Indicators: red Alarm LED; green Supply LED (flashes when on standby battery)
• Connections: -Ve (common), +Ve (+12V nominal for call points, overdoor lights etc.), Signal (trigger line)
• Call acknowledgement: yes
• Dimensions: 147mm (W) x 87mm (H) x 34mm (D)
• Construction: plastic
• IP rating: IP30
• Weight: 294g
• Operating temperature: -5°C to +40°C, max 95% relative humidity (non-condensing)