User's Manual
Table Of Contents
- 1 GENERAL DESCRIPTION
- 2 FUNCTIONAL DESCRIPTION
- 2.1 Simplified firmware flow chart and block diagram
- 2.2 Pin out
- 2.3 Pin description and operational characteristics
- 2.4 Absolute maximum ratings (non operating)
- 2.5 Maximum ratings (operating)
- 2.6 Power management and voltage regulators
- 2.7 Configuration
- 2.8 Radio telegram
- 2.9 Transmit timing
- 2.10 Charging circuitry
- 2.11 Energy consumption
- 3 APPLICATIONS INFORMATION
- 4 AGENCY CERTIFICATIONS
USER MANUAL V0.6
© 2010 EnOcean | www.enocean.com STM 320 / STM 320C / STM 321C User Manual V0.6 | Page 4/15
STM 320 / STM 320C / STM 321C
1 GENERAL DESCRIPTION
1.1 Basic functionality
The radio transmitter module STM 320 from
EnOcean enables the implementation of a
wireless magnet contact sensor. Powered by
a solar cell it works absolutely maintenance-
free. An integrated energy store allows
operation for several days even in total
darkness. Key applications are window and
door sensors. The STM 320 supervises an
integrated reed contact and reports every
status change immediately (open<>closed).
In addition a sign of life signal is transmitted
every 20-30 minutes.
A LRN button is pre-installed on the PCB. When this button is pressed a special teach-in
signal is sent.
There are two frequency variants – STM 320 in 868 MHz and STM 320C in 315 MHz.
STM 321C provides a connector for an external reed contact instead of the internal reed
contact.
Features with built-in firmware
Pre-installed solar cell
On-board energy storage and charging circuit
On-board LRN button
On-board TX indicator LED
On-board reed contact
1.2 Technical data
Antenna Pre-installed helical antenna installed
Frequency 315.0 MHz (STM 32xC)/868.3 MHz (STM 320)
Radio Standard EnOcean 868 MHz/315 MHz
Data rate/Modulation type 125 kbps/ASK
Conducted Output Power typ. 2 dBm
Power Supply Pre-installed solar cell
Illumination 50-100000 lux
Initial operation time in darkness @
25°C
typ. 6 days, energy storage fully charged
transmission of telegram every 25 min on average
1
Operation start up time with empty
energy store
typ. 2.5 min @ 400 lux / 25°C
incandescent or fluorescent light
Reed contact 1x internal, type Meder MK01-I
Radio Regulations R&TTE EN 300 220 (STM 320)
FCC CFR-47 Part 15 (STM 32xC)
1
Full performance of the PAS614L energy storage is achieved after a few days of operation
at good illumination level. Performance degrades over life time, especially if energy storage
is exposed to higher temperatures. Each 10K drop in temperature doubles the expected life
span.