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Installation notes

DANLERS Limited, Vincients Road, CHIPPENHAM, Wiltshire, SN14 6NQ, UK.

Telephone: +44 (0)1249 443377   Fax: +44 (0)1249 443388   

E-mail: [email protected]    Web: 

www.danlers.co.uk

Company Registered Number 2570169   VAT Registration Number 543 5491 38

Products available from DANLERS

•  PIR occupancy switches • Daylight linked dimmers • Manual high frequency dimmers 

•  Photocells • Radio remote controls • Time lag switches • Outdoor security switches 

•  Dimmers • Heating, ventilation and air-conditioning controls • Bespoke / O.E.M. products

Please call for more information or a free catalogue, or visit our website.

This product conforms to BS EN 60669-2-1 and BS EN 55015.
Please ensure the most recent edition of the appropriate local wiring regulations are observed 

and suitable protection is provided e.g. a 10 amp circuit breaker and voltage surge protection. 

Please ensure that this device is disconnected from the supply if an insulation test is made. 
This product is covered by a warranty which extends to 5 years from the date of manufacture.

Precautions and Warranty 

 

PIR occupancy switch with 10VDC dimming

 

  CESRA PIR 10VDC

DANLERS passive infra-red occupancy (absence detection) switches with 

closed loop control (CESRA PIR 10VDC) can be used to control high 

frequency 10VDC dimmable ballasts. 

These PIR switches incorporate a passive infra-red quad sensor to detect 

movement of a warm body within their detection zone (diagram A) and a 

photocell to monitor the ambient light level.

CESRA PIR 10VDC can be mounted directly onto solid ceilings or onto 

a range of different mounting boxes.

Functions 

When entering a zone of detection a momentary wall switch must be pressed 

to send a signal to the PIR to switch the lights ON at maximum and start 

the closed loop control to maintain the preset lux level value (LUX) between 

30 and 1000 lux (default value 1000 lux). See diagram C.

NO BACKGROUND ILLUMINANCE RUN ON TIME SET: 

If no further 

movement is detected the lights will switch OFF after the set PIR hold timer 

(TIME) has expired. This time lag can be set via the TIME adjuster to 10 

seconds, 20s, 40s, 80s, 2m30s, 5m, 10m, 20m or 40 minutes (default value 

10 seconds). See diagram B. Alternatively, the momentary switch can be 

pressed for more than 2 seconds to switch the lights OFF.

BACKGROUND ILLUMINANCE RUN ON TIME SET:

  If no further movement 

is detected the lights will FADE to minimum after the set PIR hold timer 

(TIME) has expired OR if  the momentary wall switch is pressed for more 

than 2 seconds. The lights will then stay at minimum until the background 

hold timer (RUN ON) has expired. The RUN ON time can be set via the 

RUN ON adjuster to 0, 1, 2, 5, 10, 15, 20, 30 minutes or infinite (default 

value is 0). See diagram C. 

If the momentary wall switch is pressed for less than 2 seconds while 

the background hold timer is counting down, the lights will switch ON at 

maximum and start the closed loop control to maintain the set lux level value.

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They can dim up to 20 x 1-10V dimmable ballasts, assuming each 

ballast has a constant current output of 1mA.
These PIR switches can also switch up to: 
6 amps (1500W) of dimmable fluorescent lamps. 2 amps (500W) of 

CFL, LED Drivers and LED lamps and fittings. Minimum load 2W.

 

22/08/16

INS260 CESRA PIR 10VDC

Variants

CESR PIR 10VDC:

 PIR occupancy switch (presence detection) 

with 10VDC daylight linked dimming (does not require a momentary 

(retractive wall switch).

Troubleshooting

The load will not switch on:

 

•  The moving body is not emitting more IR than the background. 

    (Person wearing insulating clothing in a warm environment) 

•  Person is too far from the PIR switch, see detection diagram. 

•  Person is moving unusually slowly (perhaps when testing).

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