NC941 Single Zone Call Controller c/w 250mA PSU

Single Zone Call Controller c/w 12V 250mA PSU

Order code: NC941 Category: Indicator Panels & Call Controllers

A single zone call controller c/w a 12V 250mA PSU and link-selectable Mute/Reset button.
Fully compatible with C-TEC’s entire range of 800 Series Call System components.
Capable of indicating standard (constant tone) and emergency (intermittent tone) calls.
Power On and Alarm ‘CALLING’ LEDs.
Open collector output goes to 12V when the controller’s onboard buzzer sounds.
Mounts on a standard UK 25mm double gang flush or surface back box.
Optional NC941B 0.3A battery battery backup kit also available.

Technical Specifications

Mains supply	230V 50/60Hz (36mA max. current). 50Hz frequency.
Internal power supply	12V d.c.
Total output current limited to	250mA.
Quiescent current	0mA (none).
Max battery size and type	Optional NC941B 12V 0.3Ahr battery back up kit available.
Alarm current	Determined by the number/type of field devices connected to the call controller/system.
Auxiliary relays	None.
Open collector outputs	1 x Output terminal (goes +12V steady when the controller's buzzer sounds). 20mA max.
Indicators	Red Alarm LED; Green Supply Present LED.
Controls	Link-selectable Reset/Mute button.
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 NC941).
Expansion connections	Batt + and Batt – (for connection to an optional remote NC941B battery back up kit).
Call acknowledgement functionality	No.
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	IP41.
Weight	275g.
Operating conditions/temperature	-5ºC to +40ºC. Max. relative humidity 95% non-condensing.

Documentation

NC941 Call Controller Instructions – DNU0941000	28.18 KB	Download
EU Declaration of Conformity – 800 Series 1-4 Zone Call Controllers (DoC)	202.33 KB	Download
UKCA Declaration of Conformity – 800 Series 1-4 Zone Call Controllers (DoC)	101.65 KB	Download

Dimensions & Mounting Information

Product Dimensions:	147 W x 87 H x 34 D mm. Mounts on a 25mm UK double gang back box.

BIM/CAD Drawings

NC941 Flush mounted BIM (RFA)

Download

NC941 Surface mounted BIM (RFA)

Download

Operation (as part of an NC951 system)

OVERVIEW

The NC941 Single Zone Call Controller is compatible with all 800 Series call points, ceiling pulls, infrared ceiling receivers, monitoring points, overdoor lights and remote sounders. Depending on how the Controller is configured and the devices connected to it, Standard and Emergency calls can be indicated via its buzzer and zonal LED. A button is also provided allowing the user to Reset or Mute standard calls depending on how it is confifued, as detailed below.

OPERATION

STANDARD CALLS: when triggered by a calling device, the Controller’s internal buzzer sounds continuously and its zone indicator illuminates steady.

If enabled for Reset operation, pressing the Controller’s button cancels all standard calls.

If enabled for Mute operation, pressing the Controller’s button silences the Controller’s internal buzzer. However, if a new call (standard or emergency) is triggered anywhere on the system, the buzzer will resound.

EMERGENCY CALLS: when triggered by a calling device, the Controller’s internal buzzer pulses and the relevant zone indicator(s) flash. This level of call takes priority over standard calls and cannot be muted or reset at the Controller. An emergency call can only be reset at the device from which it was triggered or via a reset point, wired on the same zone.

Important: A link inside the NC941 Call Controller allows its button to be configured so instead of Resetting or Muting a standard call, it has no effect. The NC941 is not recommended for use in Accessible Toilet Alarm installations as it does not have a Call Accept function. For such installations we recommend you use our NC951 Accessible Toilet Kit, NC943B Call Controller or NC910/20 range of 10-20 zone indicator panels.