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CEFL PIRDD 10VDC
(PIR occupancy switch with daylight linked dimming)
Order code:
CEFL PIRDD 10VDC
Ceiling flush-mounted PIR occupancy switch with daylight linked dimming.
Suitable for dimmable ballasts with 1-10VDC input.

Brings lights on – only when area is occupied. Automatically dims lights according to ambient light level to maintain constant brightness of between 100 and 1000 lux (adjustable). Adjustable time lag before switching off. For suspended or plasterboard ceilings. Complete with 2m cables for quick and easy installation.

Enough daylight, Occupied
- Lighting OFF
Reduced daylight, Occupied
- Lighting DIMMED
Night, Occupied
- Lighting ON
Enough daylight, Unoccupied
- Lighting OFF
Reduced daylight, Unoccupied
- Lighting OFF
Night, Unoccupied
- Lighting OFF
Specification
Detection zone: 360º
Time lag range: 10 seconds to 40 minutes in 9 steps
Photocell range: 100 to 1000 lux, falling on the working plane
Loading: Total load of ballast, lamps plus other load not more than 6 amps including fluorescent.
Can control up to 20mA, eg. 20 ballasts at 1mA.
Varies according to make and model of ballasts.
Dimensions (mm): 72 diameter x 68

Detection diagrams
CEFL PIR DD 10VDC
For optimum coverage recommended
mounting height
between 2.4
and 5m

Several CEFL PIRDD 10VDC

In open plan areas.
For best coverage the
PIR occupancy switches should be spaced every 5m in either direction, each controlling their own load.
Wiring diagram
CEFL PIRDD 10VDC controlling several
1-10VDC dimmable ballasts
Start-up mode
When the mains supply is initially connected to the PIR occupancy switch
it goes through its Start-up Mode. This means it switches on for about
1 minute, then switches off and enters its Operating Mode. If a manual wall switch is feeding the PIR occupancy switch (see wiring diagrams on appropriate product pages) then it will go through the Start-up Mode each time the wall switch is switched on. By wiring the manual wall switch in the alternative position, the supply to the PIR occupancy switch is uninterrupted and it remains in Operating Mode. It does not go through its Start-up Mode each time the wall switch is switched on.

Dimensions (in mm)
Requires 63 or 64mm (2.5") diameter hole in a false or plasterboard ceiling
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