Controller for lighting
December 1st 2006

Chalmor's two-channel BlueWave controller is helping AstraZeneca to safeguard operatives working in plant rooms at its Alderley Park site, while ensuring that lights are not left on unnecessarily.

The solution makes use of BlueWave's two channels to operate two countdown timers and activate a visual and audible alert to engineers 5min before lights switch off automatically.

On most systems the total hours run from installation is nearing 2500, with only 60+h actually in the switched-on state.

At the various entry points to each plant room there are two push-to-make switches, one to switch the lighting on and off, the other to extend the lighting period.

When someone enters the plant room, they press the on/off switch to turn lights on. Sounder and flashing beacons operate momentarily to remind the user how the system works.

The two timers begin their pre-set countdowns. At Alderley Park channel 1 (lighting channel) is set for 60min and channel 2 (sounder/ beacon channel) for 55min. If lights have not been switched off after 55min, channel 2 activates the sounder and beacons to warn that lighting will be switched off in 5min. Any person can then press the 'extend' button to re-set the timers.