User's Manual

3. APPLICATIONS INFORMATION
3.1 Unit Mounting
Both the EnOcean Reed Contact as well as the EnOcean Magnet are very thin and flat. This
means that the unit is unobtrusively mountable at every window or doorframe made of
aluminum, plastic or wood.
Mounting position of the Reed Contact is horizontal, vertically or even tilted. The arrow signs
on the base of the Reed Contact should be directed downwards. In this mounting position, the
STM 250 housing offers protection against splashing water drops (IP44).
Recommendation for mounting the STM250 on metal surfaces or window frames of
aluminum:
Please note that a radio receiver unit (e.g. RCM 120) should not be mounted in the
same plane than the STM 250 base plate is mounted, because in extension of the
metal surface the transmission range is reduced by physical radio transmission
effects of the antenna near to metal. For example the receiver should not be
mounted at the window front side.
3.2 Recommendations for Magnet Positioning
The flat magnet should be positioned by facing the housing in the middle of the reed contact
marking as follows:
Reed contact marking
Figure 20: Righted positioning of the Magnet
(Typical for window mounting)
The magnet can be positioned in vertical or in horizontal position to the Reed Contact housing.
The distance between housing and magnet should be less than 5 mm.
©EnOcean GmbH, A. Anders Page 19 of 24 STM 250 User Manual V1.3