8C. Changing rooms and showers with a combination detector

A changing room for a bathing facility is a good example of when a PD-2210HF combination detector can be the best solution for presence detection with lighting control in an automatic system.

The PD-2210HF combination detector comprises an IR detector and an acoustic detector in a shared enclosure. The IR-detector part acts in the same way as the PD-2200 IR detector. The acoustic detector only detects high frequencies (e.g. 'S' sounds, the sound of steps and scraping sounds). Activation of the lighting requires detection by the IR detector.
See further under 'Control systems' below.

This application shows an example involving light fittings with 50 Hz coil operation or non-dimmable HF ballasts.

The detector is positioned so that entry is at 90° to the IR detector's field of detection, thus guaranteeing activation of the lighting upon entry into the changing room.

The lighting remains activated for as long as presence is detected by the IR detector or the acoustic detector. This means that even if people are concealed from the IR detector behind the lockers or in the shower, presence is detected as a result of the sounds they create. The sound of trickling water in the showers is usually loud enough (there mustn't be any doors).

Upon entry into the changing room the lighting is activated when the IR detector detects presence. Only the IR detector can activate the lighting. The lighting is not activated if only the acoustic detector detects sound.

The lighting then remains activated for as long as presence is detected by either the IR detector or by the acoustic detector. The acoustic detector's task is thus to keep the lighting activated. The advantage of acoustic detection is that it also detects people concealed from the IR detector.

After the final detection the lighting remains activated for the delay period set on the detector's built-in timer. Fresh detection before the timer has stopped counting means that the lighting remains activated and the timer restarts.

With a strap in the detector the function can be selected so that the timer only restarts three times if only continuous sound is detected (in the example, sound from the swimming pool), after which the lighting is deactivated. Activation then requires detection by the IR detector.

Installation of the detectors uses the simplest possible cable, e.g. EKKX 1 x 4 x 0.25 mm2. Please see the manual that comes with the detector or the handbook regarding adjustment of the IR detectors.

The power supply to the detector uses an EXE-2000 rectifier.

For new or renovated buildings we recommend installation of dynamic lighting control. A dynamic system prevents frequent activation and deactivation of the light fittings, thus considerably reducing wear on the light sources.

See application example with dynamic lighting control

Information for current budget