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The distance between EnOcean receivers and other transmitting devices such as computers, audio and video equipment that also emit high-frequency
signals should be at least 1.6 ft (0.5 m).
Electronics that communicate wirelessly within the same frequency bandwidth will add noise and disturbances to the transmissions
between the sensor and the receiver and will therefore further reduce the transmission range.
For more information about the EnOcean and Open-to-Wireless technologies, refer to the Open-to-Wireless Solution Application Guide. For more infor-
mation about the Wireless Receiver module, refer to the Wireless Receiver Datasheet. These documents can be found at www.distech-controls.com.
Wireless Equipment Mounting Instructions
Preserving Signal Strength
When installing the wireless equipment, it is important to ensure that distances and obstructions do not impede transmission. Metallic parts, such as rein-
forcement in walls, machinery, office furniture, etc. are major sources of field strength dampening. Furthermore, supply areas and elevator shafts should
be considered as complete transmission screens (See the next figure for radio wave screening). As a rule of thumb and in normal conditions, the equip-
ment will transmit over a range of up to 100 ft (30 m) for both 868MHz and 902MHz models.
Sheet
Metal
Tx: Transmitter
Rx: Receiver
Figure 6: Screening of radio wave
Signal Transmission Quality Testing
Even under screening conditions, Distech Controls strongly recommends that you always test the signal strength regardless of the range distance be-
cause radio signals and transmission range can vary according to building and office setup. To verify the signal strength in any installation, use the RSSI
feature with EC‑
gfx
Program.
For more information on how to test signal strength, refer to the Open-to-Wireless Solution Application Guide. For more detailed information on the RSSI
feature, refer to the EC-
gfx
Program User Guide.
Transmission Obstructions and Interference
In addition to obstructions, the angle with which the transmission travels through the obstructions has a major influence on the field strength. So the
steeper the angle through an obstruction the more the field strength dampens. Therefore it is preferable that the transmission be arranged so that it trav-
els straight and perpendicularly through the obstruction.
High Penetration Angle
Tx: Transmitter
Rx: Receiver
Figure 7: Angle of radio wave
The sensor mounting location should not be on the same wall or plane as the receiver. Radio waves are rather subject to interfering leaks or reflections.
Side or opposite walls are better locations.
