EnOcean RF Transmitter STM 320 868 MHz, ASK

  • RS Stock No. 786-3205
  • Mfr. Part No. STM 320
  • Brand EnOcean
Technical Reference
Legislation and Compliance
RoHS Certificate of Compliance
Product Details

Wireless Magnet Contact Transmitter STM 320

The EnOcean STM 320 ISM-band transmitter module incorporates a solar cell power supply and a magnet contact sensor. Powered by a small pre-installed solar cell, it works absolutely maintenance-free. An integrated energy store allows operation for several days even in total darkness. Key applications are window and door sensors. The STM 320 supervises an integrated reed contact and reports every status change immediately (open<>closed). In addition a sign-of-life signal is transmitted every 20-30 minutes.

On-board solar cell energy harvester
Reed-switch magnet sensor, Meder MK23-90-BV14496 or MK01-I
Operating frequency: 868.3MHz
Data rate: 125kbps
Modulation: ASK
Radiated output power: 5dBm (typical EIRP)
EnOcean Equipment Profile: D5-00-01
Start-up time with empty energy storage typ. <2.5min @ 400lux, 25°C
Initial operation time in darkness @25°C: typically 6 days, if energy storage fully charged
Internal Learn button
LED transmission indicator
Pre-installed helical antenna
Module dimensions: 43 x 16 x 6mm
Operating temperature range: -20 to +60°C
Applications: Burglar alarm communicating with the Internet of Things (IoT)


Companion mains-switching receiver module: RCM 250 (RS Part No. 189-172)

Batteryless Wireless Applications

EnOcean manufacture a range of transmitter and receiver products that operate in the 868MHz area of the ISM band. These devices are typically very efficient in terms of the power supply requirements and are used to send short messages.,The advantages of EnOcean technology are clearly illustrated through applications such as electrical control which eliminates the need for external wired connections and batteries.,Suitable for limitless applications where maintenance free and flexible switching needs to be installed without drilling, cabling and reconstruction costs.,Power in the transmitters is also created for "FREE" using energy harvesting techniques to create energy from the push button switches or solar power for its sensors transmitters.,Radio systems based around EnOcean technology can be formed into star, mesh, or hybrid topology networks, and are a good complement to ZigBee systems, typically in building automation and remote sensor applications.

Attribute Value
Module Type Transmitter
Supported Frequency Bands 868 MHz
Modulation Technique ASK
Maximum RF Data Rate 125kbit/s
Maximum Output Power +5dBm
Dimensions 43 x 16 x 6mm
Height 6mm
Length 43mm
Maximum Operating Temperature +60°C
Minimum Operating Temperature -20°C
Width 16mm
Discontinued product