Electronic Controls for Lighting

Occupancy sensors detect a presence in the sensor's 'line of sight', which triggers the light to switch on or off, and often has a delayed switch off timer to prevent an area plunging into darkness when an occupant stops moving.

1. An effective method of control is a manual switch, to turn the lights on and an occupancy sensor to switch off the lights after a designated period
2. Keep sensor clear to ensure an uninterrupted line of sight exists across the area requiring illumination
3. Occupancy sensors are most effectively used in intermittently used rooms, such as store rooms, toilet areas and corridors

There is a wide selection of motion sensors that use passive infrared, ultrasonic or a combined multi-sensing technology. Occupancy Sensors provide automatic ON/OFF switching of lighting loads for enhance convenience, security and long-term energy savings.
The Passive Infrared (PIR) units respond to changes in the infrared background by turning lights ON when people enter space being monitored, and OFF when the space is unoccupied. The Ultrasonic (US) units transmit an ultrasound signal and monitor changes in the signals return time to detect occupancy. Multi-Technology units combine PIR and US sensing technologies for highly accurate monitoring with minimum false triggering.

Apart from occupancy sensor there is other control like Dimmer scene control also very effective method to save the energy.

Please have a look in following link where you will get different method of control, required circuit diagram and devices required, installation and maintenance guide.

http://www.leviton.com

Hi guest,

I spent 6 months installing, programming and comissioning lighting control systems for NCP car parks in the uk. I used RF PIR sensors so there was no need to run cables for the sensors. If you register with CR4 and send me your contact details, I will discuss further.

regards

Al

Please discuss it openly, so that we also will be benefited. Thanks

Don't have the time to go into the ins and outs of my system but I am very prepared to help guest if he wants.

RF powered carpark sensors?

Who has the job of going around changing the batteries? or are they solar powered?

3 D Cell batteries. Last 2 years. Their maintenance contractors got the job of changing them.

I made damn sure I got the last bit written into the contract

Al

Hi Bolton Alan,

I think you still need to run cables to connect the PIR sensors to mains and lights. I'm registered with CR4.

Not if they are RF, and have batteries inside them (as he has stated above)

your TV remote controllers lost their wires long ago, the devices BA is talking about above is similar, just a different transmission medium

Shayre,

You may think that but if you read my first post you will see that I stated:

"6 months installing, programming and comissioning".

Now with over 500 sensors involved in about 20 car parks, I think I would have remembered whether or not I needed to hardwire every single sensor.

Maybe I'm wrong! Maybe you do know better! Maybe all those systems didn't actually work but I'm sure they did and I got payed for them.

Al

(Monday morning is never good for me)

Hi

I am interested and registered with CR4. My contact e mail is gsuhas@gmail.com.

Please let me know more.

Regards