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Single Zone Call Controller c/w 12V 140mA PSU
NC943B
New
- 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.
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Technical Specifications
| 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. |
Documentation
App Note 0004
How to connect an NC951/NC943B to a Multi-Zone Call Controller (DFU0000951 Rev 1)
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Dimensions & Mounting Information
| Product Dimensions: | 147 W x 87 H x 39 D mm. Mounts on a 25mm UK double gang back box. |
Operation (as part of an NC951 system)
When used as part of an NC951 accessible toilet alarm system in conjunction with other 800 Series devices such as NC807C ceiling pull units, NC809DBBT reset points c/w sounders and NC806CS overdoor lights c/w sounders, the NC943B Call Controller operates as follows:-
1. The distressed person raises an alarm by pulling the cord on the NC807C Ceiling Pull Unit.
Inside the WC:-
• The red reassurance LED on the NC807C Ceiling Pull Unit and the red reassurance LED and sounder on the NC809DBBT Reset Point c/w Sounder activate steady to reassure the user the call has been registered.
Outside the WC:-
• The red Alarm LEDs and sounder on the NC806CS Overdoor Light c/w Sounder and the red ‘CALLING’ LED and Sounder on the NC943B Call Controller activate steady to let staff know someone is in need of assistance.
2. The member of staff responding to the Alarm call presses the 'Call Accept' button on the Call Controller.
Inside the WC:-
• The red reassurance LED on the NC807C Ceiling Pull Unit and the red reassurance LED and sounder on the NC809DBBT Reset Point c/w Sounder activate intermittently (approx 1 second on, 5 seconds off) to let the user know help is on the way.
3. Once assistance has been provided, the Alarm call is cancelled from inside the WC by pressing the ‘RESET’ button on the NC809DBBT Reset Point c/w Sounder
Inside and outside the WC:-
• All indicators and sounders are extinguished and the system returns to normal.
OPTIONS: A link inside the NC943B Call Controller allows its button operation to be configured so instead of accepting an Alarm call, it resets the call or has no effect. Both of these functions are outside the scope of BS8300 and are therefore not recommended for use in Accessible Toilet Alarm installations. However they may be suitable for use in other applications subject to the approval of the responsible person(s).