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