User's Manual

1. GENERAL DESCRIPTION
STM 250 is a wireless magnet contact. The radio sensor is powered by a small solar
cell and by that it works absolutely maintenance-free. An integrated energy store
allows operation for several days even in total darkness.
The reed contact housing and the magnet housing are very small. This means that
the EnOcean magnet contact is unobtrusively mountable at every window frame
made of aluminum, plastic or wood.
1.1 Basic Functionality
The STM 250 supervises an integrated reed contact and reports every status change
immediately (open<>closed). In addition a sign of life signal is send every 12 minutes.
Figure 1: Wireless magnet contact STM 250
T
each-in Pushbutton
Ener
gy
Store
(
GOLDCAP
)
Antenna
(Helix)
Teach-in Indication LED
Magnet Contact
(Reed)
Figure 2: STM 250 PCB (open case)
©EnOcean GmbH, A. Anders Page 4 of 24 STM 250 User Manual V1.3