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- Manufacturer or author: EnOcean GmbH
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© EnOcean | www.enocean.com Subject to modifications | May 2019 DATA SHEET Sensor Transmitter Module STM 330 / STM 331 / STM 331U / STM 332U / STM 333U (Stepcode DE and later) STM 33x is optimized for realization of wireless and maintenance free temperature sensors, or room operating panels including set point dial and occupancy button with a minimum number of external components. The module provides an integrated calibrated temperature sensor. Functional Principle Power supply is provided by a small solar cell or optional by an external 3V battery. An energy storage is installed to bridge periods of darkness. The module provides a user configurable cyclic wake up. After wake up a radio telegram will be transmitted in case of a significant change of measured temperature, the set point values or if the external occupancy button is pressed. It can be configured to use the enhanced secure mode. Available variants frequency, antenna, learn button STM 330: 868.3 MHz, whip, back button STM 331: 868.3 MHz, helical, back button STM 331U: 902.875 MHz, helical, back button STM 332U: 902.875 MHz, whip, side button STM 333U: 902.875 MHz, helical, side button Data rate/Modulation type 125 kbps / ASK (868 MHz), FSK (902 MHz) Radiated output power STM 330: +8 dBm1 (EIRP) ± 2.5 dB2 STM 331: +5 dBm (EIRP) ± 2.5 dB STM 331U: +99 dBµV/m ± 2 dB STM 332U: +101 dBµV/m ± 2 dB STM 333U: +99 dBµV/m ± 2 dB Power supply @ VDD Pre-installed solar cell Operation time in darkness @ 25°C min. 10 days, if energy storage fully charged3 Operation start up time with empty energy store typ. <2.5 min @ 400 lux / 25 °C incandescent or fluorescent light Input channels Internal: temperature sensor, LRN button External: occupancy button, set point dial, HSM 100 Temperature sensor Measurement range 0-40 °C, resolution 0.16 K Accuracy typ. ±0.5 K between 17 °C and 27 °C typ. ±1 K between 0 °C and 40 °C EnOcean Equipment Profiles configurable EEPs: A5-02-05 (default), A5-02-30, A5-10-05, A5-10-03 and with HSM 100: A5-04-01, A5-10-10, A5-10-12 SIGNAL 0x0E (Entering Transport Mode) Connector 20 pins, grid 1.27 mm, □ 0.4 mm Radio regulations RED (EU): STM 330 / STM331 FCC (US) / ISED (CA): STM 331U / STM 332U / 333U 1 Measured in test laboratory, measurement uncertainty 2.7 dB
2 Tolerance of measurement in production at 50 Ω
3 At 25°C with default configuration (wake-up cycle 100 s, transmission cycle 1000 s). Energy storage performance degrades over life time, especially if energy storage is long time exposed to very high temperatures. High temperatures will accelerate aging. Very low temperature will temporary reduce capacity of energy store and this leads to considerable shorter dark time operation. Type STM 330 STM 331 STM 331U STM 332U STM 333U Ordering Code S3001-D330 S3001-D331 S3051-D331 S3051-D332 S3051-D333 Exemplary image