• RS Stock No. 786-3205
  • Brand EnOcean
  • Mfr. Part No. STM 320
EnOcean RF Transmitter STM 320 868 MHz, ASK
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.

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Module TypeTransmitter
Supported Frequency Bands868 MHz
Modulation TechniqueASK
Maximum RF Data Rate125kbit/s
Maximum Output Power+5dBm
Dimensions43 x 16 x 6mm
Maximum Operating Temperature+60°C
Minimum Operating Temperature-20°C
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Discontinued product
Technical Reference
  • RS Components

    Statement of conformity

    The product detailed below complies with the specifications published by RS Components. Where applicable it provides assurance that electrostatic discharge sensitive devices have been handled and packed under conditions that meet the administrative and technical requirements of the ANSI/ESD S20.20:2014 and BS EN 61340-5-1:2007 Electrostatic Control Standards.
    RS Stock No. 786-3205
    Description EnOcean RF Transmitter STM 320 868 MHz, ASK
    Manufacturer/Brand: EnOcean
    Mfr. Part No. STM 320
    The foregoing information relates to product sold on, or after, the date shown below.
    Date Nov 25, 2017
    RS Components Ltd, Birchington Road, Corby, Northamptonshire, NN17 9RS, UK
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