C&E FS20 Wireless switch 1-channel Adapter Switching capacity (max.) 3680 VA 61430 Fiche De Données

• The FS20 wireless control system, including the ‘FS20 ST-3’, works in

the 868MHz range. This range is also used by other devices and radio
services.
Therefore devices that operate on the same or neighbouring frequency
may restrict both the operation of the ‘FS20 ST-3’ and its range.

• The specified range of up to 100m is the so-called free-field range.



This describes the range when there is direct visual contact
between the transmitter and the receiver.

In practice, however, walls, ceilings, etc. between the transmitter and the
receiver may affect and reduce the range.

Other causes of reduced ranges:
• All types of high-frequency interference
• Any buildings or vegetation
• Conductive metal parts that are located near the devices or within or near

their transmission path, for example, radiators, metallised insulation
glass windows, reinforced concrete ceilings, etc.

• Influence on the radiation pattern of antennas due to the distance from

the transmitter or receiver to conductive surfaces or objects (also to
human bodies or the ground)

• Broadband interference in urban areas that reduces the signal-to-noise

ratio; the signal is no longer recognised due to this ‘noise’

• Interference radiation resulting from insufficiently shielded electronic

devices, for example, operating computers or similar