NC920S
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20 Zone Master Call Controller c/w 300mA PSU (Surface Version)

* Compatible with C-TEC’s entire range of 800 Series field devices.
* Housed in an attractive flush mounting plastic enclosure measuring just 214mm x 178mm.
* Two call levels - standard (constant tone) and emergency (intermittent tone).
* Optional mute and call accept/reset buttons.
* ‘Call Accept’ functionality allows staff to send an intermittent call acknowledgment signal to calling zones to confirm help is on the way (dependent on wiring and field devices used).
* Includes a 12V 300mA PSU and 2 volt-free relay contacts which activate on a standard or emergency call.
* Innovative slide-in labelling system.
* Zones can be wired in 4 or 6 core (7/02) stranded security cable.
* Additional master controllers and expansion units available for use as repeaters on larger sites.
* Optional boxed PSUs c/w with space for a 12V VRLA battery available for sites where a standby battery facility is required.

Technical Specification

Mains supply: 230V 50/60Hz. (36mA max. current).
Internal power supply: 11V d.c. (300mA max. current when powered by Mains).
Quiescent current: 0mA (none).
Alarm current: Determined by the number/type of field devices connected to the call controller/system.
Auxiliary relays: 2 volt free relay contacts (NO/C/NC). Activate when a standard or emergency call is received by the controller.
Both relays rated at 30V d.c. @ 1A.
Auxiliary inputs: External PSU Input: 9V-15V d.c. @ 400mA (suitable for use with an NC951B 12V 1A boxed PSU which has space
available for a 12V 7AH battery).
Indicators: Green Power on LED; 10 x red Zonal Alarm LEDs (lit steady for a Standard call, pulse for an Emergency call); Internal buzzer
(on steady for any Standard call, intermittent for any Emergency call).
Controls: 2 Buttons - (A) Reset or inactive ; (B) 'Mute' or 'Call Accept'. (Both buttons are link selectable). If Call Accept is selected
indicators on relevant field devices will emit a slow intermittent tone to reassure users help is on the way.
Expansion connections: CONN2 allows the connection of 1 x NC910EF 10 Zone Expansion Unit or 1x NC920EF 20 Zone Expansion Unit.
Call acknowledgement functionality: Yes.
Product dimensions (mm): 214 W x 178 H x 70 D mm (overall).
Construction & finish: Plastic detachable lid and back box. RAL7035.
IP Rating: IP41.
Weight: 1.47kg.
Operating conditions/temperature: -5ºC to +40ºC. Max. relative humidity 95% non-condensing.