STM300U

DATA SHEET Scavenger Transceiver Module STM 300 / STM 300U The extremely power saving RF transmitter module STM 300 of EnOcean enables the realization of wireless and maintenance free sensors and actuators such as room operating panels, motion sensors or valve actuators for heating control. Power supply is provided by an external energy harvester, e.g. a small solar cell or a thermal harvester. An energy storage device can be connected externally to bridge periods with no supply from the energy harvester. A voltage limiter avoids damaging of the module when the supply from the energy harvester gets too high. The module provides a user configurable cyclic wake up (every 1, 10 or 100 sec.). After wake up a radio telegram (input data, unique 32 bit sensor ID, checksum) will be transmitted in case of a change of any digital input value compared to the last sending or in case of a significant change of measured analogue values (different input sensitivities can be selected). In case of no relevant input change a redundant retransmission signal is sent after a user configurable number of wakeups to announce all current values. In addition a wake up can be triggered externally. Features  3 A/D converter inputs  4 digital inputs  Configurable wake-up and transmission cycle  Wake-up via Wake pins  Voltage limiter  Threshold detector Type Ordering Code STM 300 STM 300U S3001-D300 S3051-D300 Technical Data Antenna Frequency Data rate Receiver Sensitivity (at 25°C) only via API Conducted Output Power @50Ω Power Supply Current Consumption Dimensions of PCB Input Channels Operating temperature Radio Regulations 1) according to ISO/IEC 14543-3-1x © 2019 EnOcean | www.enocean.com Subject to modifications | December 2017 External whip or 50 Ω antenna mountable STM 300: 868.300MHz (ASK)1) STM 300U:902.875MHz (FSK) 1) 125 kbps typ. –96 dBm2) (868.300 MHz) typ. -98 dBm2) (902.875 MHz) STM 300: 3 dBm STM 300U: 1 dBm 2.1 V–4.5 V, 2.6 V needed for startup Deep Sleep Mode: 0.2 µA Rx mode (API only): 33 mA / Tx mode: 24 mA 22x19x3 mm 4x digital input, 2x WAKE input , 3x analog input Resolution: 3x 8 bit or 1x 10 bit, 1x 8 bit, 1x 6 bit –25 up to +85°C STM 300 (max. radiated power +1.4 dBm with whip): RED (EU) STM 300U: FCC (US) / ISED (CA) 2) @ 0.1% telegram error rate (based on transmitted sub-telegrams) Subject to modifications | May 2019