Ceiling surface-mounted PIR absence switch
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Ceiling surface-mounted PIR absence switch. When someone enters a room the lights are turned on using a wall switch. When the occupant leaves the room or area of detection the CESRA PIR automatically switches the lights off after a pre-selected time. The override OFF function allows the occupant to turn the lights off from the wall switch (while the CESRA PIR is in the ON state) without waiting for the pre-selected time lag to time out. The lights can be switched back ON by operating the wall switch in the usual way. Product code: CESRA PIR |
Ideal for meeting rooms, offices, corridors, student and military accommodation, classrooms etc.
Can be mounted directly onto solid ceilings or onto a range of different mounting boxes.
Specification
| Detection Zone: | 360° |
| Time lag range: | 10 seconds to 40 minutes in 9 steps |
| Photocell range: | 30 to 1000 lux, and inactive |
| Loading: | Up to 6 amps (1500W) of resistive loads. Up to 6 amps (1500W) of fluorescent loads. Up to 3 amps (750W) of electronic and wire wound transformer loads. Up to 2 amps (500W) of CFL, 2D lamps, LED Drivers and LED lamps and fittings. Up to 1 amp (250W) of fans. |
| Dimensions: | 91 x 91 x 45 mm |
- DimensionsOpen or Close
Dimensions: 91 x 91 x 45 mm 
- Detection DiagramsOpen or Close
Strong detection zone
ie. person moving arm
Secondary detection zone
ie. person walking (less sensitive when walking straight towards PIR switch)For optimum coverage recommended mounting height between 2.4 and 5m.
PIR Quad detector gives 124 detection areas within the zone
Perspective view of detection zone
For optimum coverage recommended mounting height between 2.4 and 5m
Several PIR occupancy switches
In open plan areas
For best coverage the PIR occupancy switches should be spaced every 5m in either direction
- Wiring DiagramsOpen or Close
Single CESRA PIR 
A few CESRA PIR wired in parallel 
