Scavenger Transmitter Module STM 420J / 429J May 13, 2013

USER MANUAL
V1.0
Scavenger Transmitter Module
STM 420J / 429J
May 13, 2013
Observe precautions! Electrostatic sensitive devices!
Patent protected:
WO98/36395, DE 100 25 561, DE 101 50 128,
WO 2004/051591, DE 103 01 678 A1, DE 10309334,
WO 04/109236, WO 05/096482, WO 02/095707,
US 6,747,573, US 7,019,241
EnOcean GmbH
Kolpingring 18a
82041 Oberhaching
Germany
Phone +49.89.67 34 689-0
Fax
+49.89.67 34 689-50
info@enocean.com
www.enocean.com
Subject to modifications
STM 420J / 429J User Manual V1.0
April 30, 2013
Page 1/13
USER MANUAL
V1.0
STM 420J / 429J
REVISION HISTORY
The following major modifications and improvements have been made to the first version of
this document:
No
1.0
Major Changes
Initial version
Published by EnOcean GmbH, Kolpingring 18a, 82041 Oberhaching, Germany
www.enocean.com, info@enocean.com, phone ++49 (89) 6734 6890
© EnOcean GmbH
All Rights Reserved
Important!
This information describes the type of component and shall not be considered as assured characteristics. No responsibility is assumed for possible omissions or inaccuracies. Circuitry and specifications
are subject to change without notice. For the latest product specifications, refer to the EnOcean website: http://www.enocean.com.
As far as patents or other rights of third parties are concerned, liability is only assumed for modules,
not for the described applications, processes and circuits.
EnOcean does not assume responsibility for use of modules described and limits its liability to the
replacement of modules determined to be defective due to workmanship. Devices or systems containing RF components must meet the essential requirements of the local legal authorities.
The modules must not be used in any relation with equipment that supports, directly or indirectly,
human health or life or with applications that can result in danger for people, animals or real value.
Components of the modules are considered and should be disposed of as hazardous waste. Local
government regulations are to be observed.
Packing: Please use the recycling operators known to you.
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USER MANUAL
V1.0
STM 420J / 429J
TABLE OF CONTENT
1
1.1
1.2
1.3
1.4
1.5
GENERAL DESCRIPTION ................................................................................. 4
Basic functionality ......................................................................................... 4
Technical data ............................................................................................... 4
Physical dimensions ....................................................................................... 5
Environmental conditions................................................................................ 7
Ordering Information ..................................................................................... 7
2.1
2.2
2.3
2.4
FUNCTIONAL DESCRIPTION ............................................................................ 8
Block diagram ............................................................................................... 8
Radio telegram.............................................................................................. 8
Transmit timing ............................................................................................. 8
Energy consumption ...................................................................................... 9
3.1
3.2
3.3
3.4
APPLICATIONS INFORMATION....................................................................... 10
Antenna Details ........................................................................................... 10
Transmission range...................................................................................... 11
Connecting an external backup battery .......................................................... 11
Mounting STM 420J / 429J into a housing ....................................................... 12
2
3
4
AGENCY CERTIFICATIONS ............................................................................ 13
5
Label Information ........................................................................................ 13
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USER MANUAL
V1.0
STM 420J / 429J
1
GENERAL DESCRIPTION
1.1
Basic functionality
The radio transmitter module STM 420J / 429J 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 420J / 429J 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.
STM 420J / 429J operates at 928.35MHz using FSK.
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
Frequency
Data rate/Modulation type
Radiated Output Power
Power Supply
Initial operation time in
darkness @ 25°C
Pre-installed helical antenna installed
928.35MHz
125 kbps / FSK
Typ. 0dBm
Pre-installed solar cell
Illumination 50-100000 lux
typ. 6 days, min 90 hours
if energy storage fully charged
transmission of telegram every 25 min on average 1
Operation start up time with empty
energy store
Reed contact
Radio Regulations
typ. 2.5 min @ 400 lux / 25°C
incandescent or fluorescent light
1x internal, Meder MK23-90-BV14496 or MK01-I
ARIB STD-T108
1
Full performance of the PAS614L energy storage is achieved after several days of operation (up to two weeks) at good illumination level. Performance degrades over life time, especially if energy storage is exposed to higher temperatures. Each 10 K drop in temperature doubles the expected life span.
© 2013 EnOcean | www.enocean.com
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USER MANUAL
V1.0
STM 420J / 429J
1.3
Physical dimensions
PCB dimensions
43±0.2 x 16±0.3 x 1±0.1 mm
Module height
6 mm
Weight
5.2 g
STM 420J PCB drawing (STM 429J implements vertical LRN button and LED)
© 2013 EnOcean | www.enocean.com
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USER MANUAL
V1.0
STM 420J / 429J
STM 420J system drawing (STM 429J implements vertical LRN button and LED)
© 2013 EnOcean | www.enocean.com
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USER MANUAL
V1.0
STM 420J / 429J
1.4
Environmental conditions
Operating temperature
Storage temperature
Shelf life (in absolute darkness)
Humidity
-20 °C … +60 °C
2
-20 °C … +60 °C, recommended : +10 °C…+30 °C, <60%r.h.
36 months after delivery3
0% … 93% r.h., non-condensing
The module shall not be placed on conductive materials, to prevent discharge of
the internal energy storages 3. Even materials such as conductive foam (ESD protection) may have negative impact.
1.5
Ordering Information
Type
STM 420J
STM 429J
Ordering Code
S3061-D420
S3061-D429
2
Recommended for maximum life of energy storage capacitor
Deep discharge of the PAS614L energy storage leads to degradation of performance.
Therefore products have to be taken into operation after 36 months. At least the PAS614L
needs to be recharged to 2.1 V.
3
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V1.0
STM 420J / 429J
2
FUNCTIONAL DESCRIPTION
2.1
Block diagram
A change of the reed contact status or pushing the LRN button will wake the transmitter
unit to send a radio telegram immediately (reed contact position, LRN push button status,
unique 32-bit sensor ID, checksum). In addition a redundant retransmission signal is sent
to announce the contact status even in case of no input signal changes. This signal transmitted every 20-30 min, affected at random. The transmit indicator LED flashes briefly at
every radio transmission.
Between the wake-up phases, the device is in sleep mode for minimum power consumption.
2.2
Radio telegram
STM 420J / 429J transmits a radio telegram according to EnOcean Equipment Profile
EEP D5-00-01 as defined in the EnOcean Equipment Profiles 2.5 specification.
2.3
Transmit timing
The setup of the transmission timing allows avoiding possible
of other EnOcean transmitters as well as disturbances from
transmission cycle, 3 identical subtelegrams are transmitted
sion of a subtelegram lasts approximately 0.9 ms. The delay
sion bursts is affected at random.
© 2013 EnOcean | www.enocean.com
collisions with data packages
the environment. With each
within 40 ms. The transmisbetween the three transmis-
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STM 420J / 429J
2.4
Energy consumption
100
10
Current [mA]
1
0.1
0.01
0.001
0.0001
0.00001
0
10
20
30
40
50
60
70
80
90
100
Time [ms]
Charge needed for one measurement and transmit cycle: ~80 µC
Charge needed for one measurement cycle without transmit: ~10 µC
Calculations are performed on the basis of electric charges because of the internal linear
voltage regulator of the module. Energy consumption varies with voltage of the energy
storage while consumption of electric charge is constant.
From these values the following typical performance parameters at room temperature have
been calculated:
Wake and
transmit
cycle [s]
Operation Time in darkness
[h] when storage fully
charged
Required reload time [h] at 200 lux
within 24 h for continuous operation
1500
175
1.8
Assumptions:
 Internal storage PAS614L-VL3 (after several days of operation at good illumination
level) with 0.25 F, Umax=3.2 V, Umin=2.3 V, T=25 °C
 Consumption: Transmit cycle 80 µC, measurement cycle 10 µC
 Pre-installed solar cell ECS 300, operating values 3 V and 5 µA @ 200 lux fluorescent
light
 Current proportional to illumination level (not true at very low levels!)
These values are calculated, the accuracy is about +/-20%! The performance varies over
temperature and may be strongly reduced at extreme temperatures.
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USER MANUAL
V1.0
STM 420J / 429J
3
APPLICATIONS INFORMATION
3.1
Antenna Details
Antenna location recommendation
STM 420J / 429J with host PCB
Host PCB
GND plane
STM 420J / 429J without host PCB
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STM 420J / 429J
3.2
Transmission range
The main factors that influence the system transmission range are type and location of the
antennas of the receiver and the transmitter, type of terrain and degree of obstruction of
the link path, sources of interference affecting the receiver, and “Dead” spots caused by
signal reflections from nearby conductive objects. Since the expected transmission range
strongly depends on this system conditions, range tests should categorically be performed
before notification of a particular range that will be attainable by a certain application.
The following figures for expected transmission range are considered as a rough guide only:




Line-of-sight connections: Typically 30 m range in corridors, up to 100 m in halls
Plasterboard walls / dry wood: Typically 30 m range, through max. 5 walls
Ferroconcrete walls / ceilings: Typically 10 m range, through max. 1 ceiling
Fire-safety walls, elevator shafts, staircases and supply areas should be considered as
screening.
The angle at which the transmitted signal hits the wall is very important. The effective wall
thickness – and with it the signal attenuation – varies according to this angle. Signals
should be transmitted as directly as possible through the wall. Wall niches should be avoided. Other factors restricting transmission range:
 Switch mounted on metal surfaces (up to 30% loss of transmission range)
 Hollow lightweight walls filled with insulating wool on metal foil
 False ceilings with panels of metal or carbon fiber
 Lead glass or glass with metal coating, steel furniture
The distance between EnOcean receivers and other transmitting devices such as computers, audio and video equipment that also emit high-frequency signals should be at least
0.5 m.
A summarized application note to determine the transmission range within buildings is
available as download from www.enocean.com.
3.3
Connecting an external backup battery
In case there is not sufficient light available for operation with solar cell an external 3 V
Lithium backup battery can be connected to the module at the soldering pads shown below:
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USER MANUAL
V1.0
STM 420J / 429J
3.4
Mounting STM 420J / 429J into a housing
The figure below shows an example of a housing in which the module can be mounted (with
antenna pointing to the left). Design data of the housing and the modules is available in
.igs format.
Please make sure not to exert shear force (side force within the plane of the solar
cell) onto the solar cell! The maximum vertical force onto the solar cell must not
exceed 4 N and should be homogeneously distributed! Bending of the PCB must be
avoided!
Please make sure that the housing covers 0.5 mm at the solar cell edges. Within
0.5 mm off the edge flaking is possible due to the cutting process.
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USER MANUAL
V1.0
STM 420J / 429J
4
AGENCY CERTIFICATIONS
STM 420J / 429J will be tested to fulfil the approval requirements ARIB STD-T108 based on
the built-in firmware.
5
Label Information
Product
variant
© 2013 EnOcean | www.enocean.com
Revision
Date Code
(ww/YY)
STM 420J / 429J User Manual V1.0 | Page 13/13
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