User Manual Radio Magnet Contact STM 250 Step Code
Contents
1. a If released in period lt 10 seconds then actual mode is kept No further ac tion b If hold for at least 10 seconds then the actual mode is changed standard gt secure or secure gt standard LED flashes briefly Teach in is performed ac cording to the actual new mode 3 Button is released no action Upon entry into secure mode a secure teach in telegram is sent by STM 250 Please see Chapter 2 2 3 for details Before changing the operating mode please make Sure to clear the device from all receivers which have been taught to work with this device before Otherwise the receiver will ignore the telegrams and the application will not work The flag for actual mode itself is stored in non volatile memory After power down reset the previous selected mode is active Therefore mode change is limited to 50 times In normal application scenario only very few are required The factory delivery mode of the STM 250 is Standard not encrypted This mode is com mon mode originally available Secure mode was added in later product upgrades 2015 EnOcean www enocean com STM 250 User Manual V2 3 Page 9 18 USER MANUAL Green Smart Wireless enocean STM 250 2 2 3 Security Teach In To process security communication on a receiver the STM 250 has to send a security teach in telegram to the receiver and so inform him about the used security profile AES key and initial RLC counter The security teach in has to tak2. phones are not allowed For approval aspects it must be ensured that the STM 250 reed contact is not operated more than 13 000 times per hour e g window opened or window closed For this calculation the extraordinary short telegram length is considered including all subtelegrams Also a tolerance of 5 in telegram length is included 5 DECLARATION OF CONFORMITY BRANDING These products are offered solely as finished products for OEM customers and without an EnOcean label The OEM partners as the instance responsible for marketing them must add their own CE declaration and product identification The declaration of conformity can be produced on the basis of documentation provided by EnOcean EnOcean assumes no re sponsibility of any kind for OEM products to end users 2015 EnOcean www enocean com STM 250 User Manual V2 3 Page 18 18
3. 4 Energy consumption z E E 2 5 o Time ms 2015 EnOcean www enocean com STM 250 User Manual V2 3 Page 10 18 USER MANUAL Green Smart Wireless enocean STM 250 Charge needed for one measurement and transmit cycle 80 uC Charge needed for one measurement cycle without transmit 10 uC 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 Operation Time in darkness transmit h when storage fully Required reload time h at 200 lux with cycle s charged in 24 h for continuous operation Assumptions m 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 m Consumption Transmit cycle 80 uC measurement cycle 10 uC m Pre installed solar cell ECS 300 operating values 3 V and 5 uA 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 2 4 1 Consumption in enhanced security mode Enhanced security mode requires more energy due to en
4. Bookmark not defined Zaa nS d ne EE 10 Z GENE GY COMNSUIMDCION WE 10 APPLICATIONS INFORMATION ME 15 Sad EB int Lef Le n de e EE 15 3 2 Recommendations for Magnet Dositioning cc cccccceeee eee eens eeeeeeeeeeee eee e eee ennaaas 15 J3 JEE ge 17 3 4 Connecting an external backup battery cece cece cece eee reer seen eee e eee e ee eees 17 AGENC CERTIFICATION EE 18 DECLARATION OF CONFORMITY BRANDING E 18 2015 EnOcean www enocean com STM 250 User Manual V2 3 Page 3 18 v USER MANUAL Green Smart Wireless enocean 1 GENERAL DESCRIPTION 1 1 Basic functionality STM 250 is a wireless magnet contact The radio sensor is powered by a small solar cell and by that it works absolutely maintenance free An integrated energy store allows operation for several days even in total darkness STM 250 supervises an integrated reed contact and reports every status change immediately open lt gt 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 through a hole in the back plate a special teach in signal is sent The reed contact housing and the magnet housing are very small This means that the EnOcean magnet con tact is unobtrusively mountable at every window frame made of aluminum plastic or wood STM 250 is designed and qualified for the indoor use in building automation amp installation not for ind
5. 0 K drop in tempera ture doubles the expected life span 2015 EnOcean www enocean com STM 250 User Manual V2 3 Page 4 18 USER MANUAL Green Smart Wireless enocean Radio Regulations R amp TTE EN 300 220 Encryption Algorithms VAES 128 CMAC 1 3 Physical dimensions 1 3 1 Reed contact unit Dimensions 110 x 19x15 mm Color of housing signal white Material of housing PC ABS Side view Front view Color may change by strong irradiation of sun light 2015 EnOcean www enocean com STM 250 User Manual V2 3 Page 5 18 USER MANUAL Green Smart Wireless enocean Access to teach in pushbutton Pl Se MO ooa N lt P a T w L ATNA Wee EH E Bottom view 1 3 2 Magnet unit Dimensions Color of housing Material of housing 37 x 10 x 5 mm signal white PC ABS Top view Side view mm Front view Bottom view 2015 EnOcean www enocean com STM 250 User Manual V2 3 Page 6 18 USER MANUAL Green Smart Wireless enocean STM 250 1 4 Environmental conditions Operating temperature 20 C 60 C Storage temperature 20 C 60 C recommended 10 C 30 C lt 60 r h Shelf life in absolute darkness 36 months after delivery Humidity 0 93 r h non condensing Protection class IP 40 indoor use only 1 5 Ordering Information Type Ordering Code Packaging Units STM 250 white gt Recommende
6. RN El 2015 EnOcean www enocean com STM 250 User Manual V2 3 Page 17 18 USER MANUAL STM 250 Green Smart Wireless enocean 4 AGENCY CERTIFICATIONS The devices conform to the requirements for a CE marking and to the R amp TTE EU directive on radio equipment The assembly conforms to the European and national requirements of electromagnetic compatibility The conformity has been proven and the according docu mentation has been deposited at EnOcean The devices can be operated without notification and free of charge in the area of the European Union and in Switzerland The following provisos apply AN E EnOcean RF devices must not be modified or used outside their specification limits EnOcean RF devices may only be used to transfer digital or digit ized data Analog speech and or music are not permitted EnOcean RF devices must not be used with gain antennas since this may result in allowed ERP or spurious emission levels being exceeded The final product incorporating EnOcean RF devices must itself meet the essential requirement of the R amp TTE Directive and a CE marking must be affixed on the final product and on the sales packaging each Operating instructions containing a Declaration of Conformity has to be attached If the STM 250 transmitter is used according to the regulations of the 868 3 MHz band a so called Duty Cycle of 1 per hour must not be exceeded Permanent transmitters such as radio ear
7. USER MANUAL Green Smart Wireless enocean March 3 2015 Observe precautions Electrostatic sensitive devices Patent protected W098 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 Phone 49 89 67 34 689 0 Subject to modifications Kolpingring 18a Fax 49 89 67 34 689 50 STM 250 User Manual V2 3 82041 Oberhaching info enocean com March 3 2015 4 06 PM Germany www enocean com Page 1 18 USER MANUAL Green Smart Wireless enocean STM 250 REVISION HISTORY The following major modifications and improvements have been made to the first version of this document No Major Changes Modified documentation for marketing as OEM product Document rewritten due to changed internal electronics product step code EA Specification of shelf life improved Removed black variant Security features added 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 characteris tics 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 web site ht
8. cryption algorithm computing time and extended telegram length because of CMAC This added consumption is compensated by reducing the subtelegram count to 2 With this measure the operation in dark time is even little bit increased There it is to assume the operation in dark time is not reduced by using enhanced security 2 5 Storing the Rolling code counter For the enhanced security features a RLC Counter needs to be stored in non volatile memory For security reasons the RLC Counter is incremented by every transmitted tele gram Together with the CMAC the RLC ensures that messages cannot be reproduced or forged In STM 250 the RLC is stored in the Dolphin chip flash memory To improve the endurance of the flash memory and also the energy budget not every increment is saved to the non volatile flash memory During deep sleep the RLC is stored in RAMO memory The RLC stor ing algorithm is described in the following text Constrains e Writing a RLC 4bytes into flash is not energy consuming It is fast uSec and re quires almost no extra energy e Erasing a flash page is energy consuming operation It takes 40ms and requires ex tra energy 2015 EnOcean www enocean com STM 250 User Manual V2 3 Page 11 18 USER MANUAL Green Smart Wireless enocean For details on energy consumption for flash operation please see the Dolphin Chip Core specification https www enocean com dolphin core description Strategy
9. d 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 1V 2015 EnOcean www enocean com STM 250 User Manual V2 3 Page 7 18 USER MANUAL Green Smart Wireless enocean 2 FUNCTIONAL DESCRIPTION 2 1 Block diagram AN Helical antenna Transmit Indicator LRN button Energy Storage 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 trans mitted 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 consump tion 2 2 Radio telegram STM 32x transmits a radio telegram according to EnOcean Equipment Profile EEP D5 00 01 as defined in the EnOcean Equipment Profiles specification http www enocean alliance org eep By pressing the LRN button in standard mode an 1BS Teach in telegram is transmitted 2 2 1 Enhances security telegram The STM 250 can be operated in m Standard mode no enhanced
10. e We implement a ring buffer which consist of multiple 16 pages e The RLCs are written sequentially to the current page e When the page is full we move to the next page e When almost all pages are full we erase the oldest page Diagram Legend Free page Partially written page Pi Full page e Pointer to the current page and direction how the rolling codes are written gt e Pointer to the last oldest page and direction how the flash pages are erased 2015 EnOcean www enocean com STM 250 User Manual V2 3 Page 12 18 USER MANUAL Green Smart Wireless enocean STM 250 First rolling code is written to flash Several i are full Almost all flash were full we deleted the first page Because the flash pages act as a ring buffer this situation is also normal Definitions e RLC 32 bit counter value used for encryption and authentication After a data tele gram is send it is incremented by 1 e RLC amo RLC value saved in RAMO It contains the actual RLC value e RLCrash RLC value saved in flash This value is older or the same as RULL emp ARLC RLCamo RLCrash The difference between the RLCiasn value saved in flash and the current RLC amo saved in RAMO RLCsave winpow is fixed to 30 Vcc actual supply voltage V Von voltage required to switch the chip ON after it was in OFF state Voff under this voltage the chip is switched off RAM and RAMO data are lost Constrains e We assume tha
11. e made of alu minum plastic or wood Mounting position of the reed contact is horizontal vertically or even tilted The arrow signs on the base of the reed contact should be directed downward In this mounting position the STM 250 housing offers protection against splashing water drops Mounting STM 250 on metal surfaces or aluminum window frames will reduce the transmis sion range Therefore please note that a radio receiver unit should not be mounted in the same plane as the STM 250 base plate because in extension of the metal surface the transmission range is reduced by physical radio transmission effects of the antenna near to metal For example the receiver should not be mounted at the window front side 3 2 Recommendations for magnet positioning The flat magnet should be positioned by facing the housing in the middle of the reed con tact marking as follows Reed contact marking Righted positioning of the magnet Typical for window mounting The magnet can be positioned in vertical or in horizontal position to the reed contact hous ing The distance between housing and magnet should be less than 5 mm Reed contact marking 19 Planar positioning of the magnet 2015 EnOcean www enocean com STM 250 User Manual V2 3 Page 15 18 USER MANUAL Green Smart Wireless enocean Typical for door mounting The round pole magnet can be removed from the magnet housing This enables smart em beddin
12. e place before any other communication can be executed profile teach in included To trigger the transmission of the teach in tel egram press the LRN button The security teach in and then the profile teach in are trans mitted The profile teach in telegram is already protected by advanced security features The process of sending security teach in telegram and profile teach in telegram is triggered by pressing the LRN button in secure mode The behaviour of the LRN button is following 1 Button is pressed 2 Security teach in is send 3 Profile teach in is send For more information on the structure of the teach in telegram please refer to chapter 4 2 of http www enocean com en security specification 2 3 Transmit timing The setup of the transmission timing allows avoiding possible collisions with data packages of other EnOcean transmitters as well as disturbances from the environment With each transmission cycle 3 identical subtelegrams are transmitted within 40 ms The transmis sion of a subtelegram lasts approximately 0 9 ms The delay between the three transmis sion bursts is affected at random 2 3 1 Secure transmission timing In secure mode of STM 250 the transmission cycle includes 2 identical subtelegrams are transmitted within 20 ms This is required to compensate the additional energy requirement of enhanced security computing and additional payload The transmission of a subtelegram lasts approximately 1 2 ms 2
13. g into wooden window casements in square position to the reed contact housing But note that the round pole must be mounted beside the reed contact marking as follows or Pole faced positioning of magnet Typical for mounting at wooden window casements The distance between housing and magnet should be less than 4 mm when using this mounting position Always take care for sufficient distance of the magnet to magnetic data carri ers e g credit cards Data could be erased 2015 EnOcean www enocean com STM 250 User Manual V2 3 Page 16 18 USER MANUAL Green Smart Wireless enocean STM 250 3 3 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 by using a PTM a STM or a TCM radio transmitter device and the TCM radio receiver device with preinstalled whip antenna and may be used as a rough guide only Line of sight connections Typically 30 m
14. 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 avoid ed Other factors restricting transmission range m Switch mounted on metal surfaces up to 30 loss of transmission range Hollow lightweight walls filled with insulating wool on metal foil m False ceilings with panels of metal or carbon fiber m Lead glass or glass with metal coating steel furniture The distance between EnOcean receivers and other transmitting devices such as comput ers 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 4 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 PCB inside the module at the soldering pads shown below Energy store AEA HN got nm L
15. security is used This is the common operation mode originally available This is also the default factory mode 2015 EnOcean www enocean com STM 250 User Manual V2 3 Page 8 18 USER MANUAL Green Smart Wireless enocean STM 250 m Security mode communication is protected by enhanced security features This mode was added later in module evolution In secure mode of STM 250 the payload content of the telegram is always protected with advanced security features Normal operation telegram payload and also Teach in telegram payload are protected in the same way The security features used are defined by the Security Level format SLF This parameter is set by default to the highest possible level m 24 bit RLC m No RLC TX m 4 byte CMAC m VAES encryption The security features are added to the communication by encapsulating the payload and Teach in telegram payload into a secured telegram The payload itself is not changed and corresponds to the standard mode payload like defined in chapter 2 2 EEP D5 00 01 Please refer to the EnOcean Security Specification for details http www enocean com en security specification 2 2 2 Switching between modes STM 250 can be switched from normal mode to secure mode and vice versa by long press of the LRN Button The behaviour of the LRN button is following 1 Button is pressed LED flashes briefly Teach in is performed according to the actual mode 2 Button is hold
16. t the voltage will not drop from about Von to under Voff e It has to be assured by HW and SW that any operation e g sending a telegram or erasing a flash page will not cause to drop the voltage from Von to under Voff Rules e If Ve gt Von then increment the RLC amo after the data telegram has been sent Saving to flash is not needed e If Voe lt Von and ARLC gt RLCsave winpow then the RLC amo has to be saved to flash and Rosch RLCramo send data telegram and increment RLC amo e If Vi gt 2 8V and flash memory is almost full then erase a flash page and go to deepsleep don t send any telegram this would required even more energy and the chip would probably switch off e After the chip starts from power down read RLC ilash from flash and set HI mp RLCrash RLCsave winpow 2015 EnOcean www enocean com STM 250 User Manual V2 3 Page 13 18 USER MANUAL Green Smart Wireless enocean Example Diagram 3 24 LCa M eeo bw Voltage Se e RLC Changed 1 2 RLC Saved 0 6 Von Voff 0 For the illustration we set RLCsave winpow equal to 4 2015 EnOcean www enocean com STM 250 User Manual V2 3 Page 14 18 USER MANUAL Green Smart Wireless enocean STM 250 3 APPLICATIONS INFORMATION 3 1 Unit mounting Both the reed contact unit as well as the magnet contact unit is very thin and flat This means that they are unobtrusively mountable at every window or doorfram
17. tp 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 contain ing 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 2015 EnOcean www enocean com STM 250 User Manual V2 3 Page 2 18 USER MANUAL Green Smart Wireless enocean TABLE OF CONTENT U P GENERAL DESCRIPTION lt p ceccncnsctateteaciccntesctacwnesenetascnadesereucseveresatecatesaneleceuctenes 4 1 1 Basic functionality EEN 4 lA TECHNICAL dAl EE 4 1 3 Physical EIERE EE Ee SE EE EE ee 5 1 3 1 Reed contact En EE 5 ta Maga ul EE 6 1 4 Environmental condittons teen eee eee eee e eee e sees eeeeeeeeeeeeeeeeeeeeeeeeenegs 7 LS Ordering le el gan e EE 7 FUNCTIONAL DESCRIPTION WE 8 2A BOC OO A EE 8 2 2 Radio telegram NENNEN Error
18. ustrial applications in cause of ESD protection Typical applications are window flap and door monitoring The STM 250 in 868 MHz include the enhanced secure mode In enhanced secure mode the communication is protected by enhanced security features e g encryption The modules can be switched from standard mode without enhanced security to enhanced mode and back by long press of LRN button in field operation 1 2 Technical data Antenna Pre installed helical antenna installed Frequency 868 3 MHz Radio Standard EnOcean 868 MHz 315 MHz EnOcean Equipment Profile EEP D5 00 01 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 typ 6 days min 90 hours darkness 25 C if energy storage fully charged transmission of telegram every 25 min on average Operation start up time with empty typ 2 5 min 400 lux 25 C energy store incandescent or fluorescent light Reed contact 1x internal Meder MK23 90 BV14496 or MKO1 I 1 http www enocean alliance org fileadmin redaktion enocean_alliance pdf EnOcean_Equipment_Profiles_EEP2 1 pdf Matched to impedance of whip antenna not 50 Q gt 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 1
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