USER MANUAL
STM 429J – Scavenger Transmitter Module
© 2017 EnOcean | www.enocean.com
STM 429J User Manual | v2.0 | Nov 2017 | Page 4/ 17
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GENERAL DESCRIPTION
1.1
Basic functionality
The radio transmitter modules and 429J from EnOcean
enable the implementation of a wireless magnet contact
sensor.
Powered by a solar cell, it works absolutely mainte-
nance-free. An integrated energy store allows operation
for several days even in total darkness.
Key applications are window and door sensors.
STM 429J supervise an integrated reed contact and re-
port every status change immediately (open <>
closed). In addition a sign of life signal is transmitted
every 20-30 minutes.
A LRN button and a TX indicator LED are pre-installed on the PCB. On STM 429J they are
oriented upwards. When the LRN button is pressed then a special teach-in signal will be
sent.
STM 429J operate at 928.35MHz using FSK modulation.
STM 429J in enhanced mode provides enhanced security features with encrypted communi-
cation.
Features with built-in firmware
Pre-installed solar cell
On-board energy storage and charging circuit
On-board LRN button (operated from above on STM 429J)
On-board TX indicator LED (pointing upwards on STM 429J)
On-board reed contact
1.2
Technical data
Antenna
Pre-installed helical antenna installed
Frequency
928.35MHz
Data rate/Modulation type
125 kbps / FSK
Radiated Output Power
Typ. 0dBm
Power Supply
Pre-installed solar cell
Illumination 50-100000 lux
Initial operation time in
darkness @ 25°C
typ. 6 days, min 90 hours
if energy storage fully charged
transmission of telegram every 25 min on average
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Operation start up time with empty
energy store
typ. 2.5 min @ 400 lux / 25°C
incandescent or fluorescent light
Reed contact
1x internal, Meder MK23-90-BV14496 or MK01-I
Radio Regulations
ARIB STD-T108
Security Level Format
24-bit RLC, No RLC tx, 4-byte CMAC, VAES encryption
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Full performance of the PAS614L energy storage is achieved after several days of opera-
tion (up to two weeks) at good illumination level. Performance degrades over life time, es-
pecially if energy storage is exposed to higher temperatures. Each 10 K drop in tempera-
ture doubles the expected life span.
