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User Manual May 2019 | Page 14/49
USER MANUAL
Scavenger Transmitter Module
STM 330 / STM 331 STM 331U / STM 332U / STM 333U
(Stepcode DE and later)
2.4
Environmental conditions
Operating temperature
-20 °C … +60 °C
Storage temperature
-20 °C … +60 °C, recommended
4
: +10 °C…+30 °C, <60%r.h.
Shelf life (in absolute darkness)
36 months after delivery
Humidity
0% … 93% r.h., non-condensing
Deep discharge of the energy storage leads to degradation of perform-
ance. Radio modules will be delivered in transport mode to avoid this. If
there is a storage time after configuration or commissioning, the radio
module has to be switched back to transport mode to reduce power con-
sumption to a minumum.
If a storage time of more than 36 months is required, the energy storage
(MS414FE) has to be recharged (e.g. 2 days @ 1.000 lux) or with external 3.1 V.
2.5
Ordering Information
Type
Ordering Code Frequency
Note
STM 330
S3001-D330
868.3 MHz
whip antenna, back oriented LRN button
STM 331
S3001-D331
868.3 MHz
helical antenna, back oriented LRN button
STM 331U S3051-D331
902.875 MHz
helical antenna, back oriented LRN
STM 332U S3051-D332
902.875 MHz
whip antenna, side oriented LRN button
STM 333U S3051-D333
902.875 MHz
helical antenna, side oriented LRN button
The module shall not be placed on conductive materials, to prevent discharge of
the internal energy storages. Even materials such as conductive foam (ESD pro-
tection) may have negative impact.
