Product Manual () (English)
Contents
1. Alarm is sent on the bus with the value 1 An alarm can only be deleted by a reset when the device is unset see communication object Reset If the device receives the value 1 at the communication object Alarm e g from another zone terminal the alarm memory is switched on Telegram value 0 Telegram value 1 Status Alarm of the device alarm memory ON Walk test The walk test function of the zone terminal can be switched on with the com munication object Walk Test value 1 or switched off value 70 Telegram value 0 Telegram value 1 Status of the Test output Switched off 0 V Switched on 12 V If the zone terminal switches the walk test function off automatically during timed operation this information is not sent on the bus Reset A reset of the zone terminal can be requested via the communication object Reset A reset is only possible when the device is deactivated Telegram value 0 Telegram value 1 Receipt Reset request of telegram Supply Voltage Fault The status of the 12 V DC supply voltage is reported with this communicati on object By sending this telegram cyclically the presence of the zone termi nal can be monitored on the bus Telegram value 0 Telegram value 1 Status Zone terminal 2 fold FM ABB i bus EIB MT U 2 12 1 GH Q631 0060 R0111 Set Confirmati2. Frs 3 Alarm Inputoutput Telegram Alarm 1 Bit Auto z r S t al 4 Walk Test Input Telegram walk Test 1 Bit Auto sr st 5 Reset Input Telegram Reset 1 Bit Auto sr st E Supply otage Faul Output Telegram Zone E 1 Bit Auto s s sr T Set Confirmation Output Telegram 2J 1 Bit Auto wi oe ne a Switch Off Zone amp Input Telegram Zone 1 Bit Auto sr sr g Switch Off Zone E Input Telegram Zone B 1 Bit Auto sr sr 4 a Ready EN Zone objects Status Zone A B 1 bit Each zone has a separate 1 bit communication object which can send the status of the zone to the EIB bus BS Telegram value 0 Telegram value 1 of zone If the alarm memory is activated the telegram value does not revert to 0 until a reset has been carried out A reset is only possible if the device is deactivated Set Unset Request With the communication object Set Unset Request the device receives a request for setting or unsetting If it is not possible to set the device this communication returns the value 0 This also prevents other devices from being set ABB i bus EIB Zone terminal 2 fold FM MT U 2 12 1 GH Q631 0060 RO111 Telegram value 0 Telegram value 1 f Unset Set Receive request request Response Setting is not possible Alarm If an alarm is triggered while the device is set e g due to a fault in a zone the communication object
3. If no cyclical monitoring is required and or a further monitoring logic is used it is possible to increase the number of zone terminals Note The L208 requires at least one battery SAK 7 and an operator keypad L208 PT or L840 PT to function The L208 makes a backup supply of 12 V DC available for the zone terminal via the EIB interface L208 L208 EIB Ela MTS Ee g a MTU 2 12 1 max 8 _ MG7 T ren verschliessen mas Sabotage Betrieb Unschart AA ED ED FADED 12 V 7 Ah L208 PT L840 PT 17 ABB i bus EIB 18 Zone terminal 2 fold FM MT U 2 12 1 GH Q631 0060 RO111 Application description In this configuration the control unit L208 has taken over the control for arming the device resetting the system and issuing alarms The following parameters can therefore be set on the zone terminal III Attention LI General Zones Supply Voltage Walk Test Setting Arming Prevent setting if zone detects a fault Em object Set Confirmation LE EI object Set Unset Request Behaviour of output s u normal operation e Prevent setting if zone detects a fault no The alarm control unit prevents the device from being set e Negative acknowledge via object no A zone terminal cannot cancel the activation of the system This function is reserve
4. and the alarm memory see below is activated It is not possible to set the device if an alarm is active if there is a fault in a zone or ifthe supply voltage has failed if an attempt is made to set the devi ce the communication object Set Unset Request responds with the value A Alarm and alarm memory The alarm memory is activated if the device switches to the alarm state An alarm is triggered if there is a fault in one of the zones or on receipt of the value 1 at the communication object Alarm The alarm memory ensures that the value of a zone is not reset to 0 after an alarm It is thus possible to trace which detectors were triggered during the alarm When the device is unset the values of the zones remain unchan ged until a reset is carried out Walk test Some detectors e g infrared movement detectors have a walk test input so that the detection range can be set When the walk test is activated an LED on the movement detector indicates whether movement has been recorded The zone terminal therefore has a walk test function available with the asso ciated output When the walk test is activated the voltage at the Test output is 12 V DC The Test output can be set with a time limit In this case it switches off auto matically once the set time has elapsed The walk test function is switched on and off via the bus communication object Walk Test Reset A reset must be carried
5. is possible if the fault has been rectified 14 ABB i bus EIB 5 Planning and application 5 1 Overview and general recommendations 5 2 Stand alone operation without central security logic Zone terminal 2 fold FM MT U 2 12 1 GH Q631 0060 R0111 e For applications with standard security requirements the MT U 2 12 1 normally operates on the EIB without any central security logic stand alone operation e In installations with increased requirements for functionality and security it is advisable to operate the MT U 2 12 1 in connection with an intruder alarm control unit L 208 with an EIB interface backup supply for the bus voltage in the case of mains failure is recom mended e The communication object Set Confirmation is not generally required in the configurations described If you however use this object for example to display the arming of each individual MT U 2 12 1 please note that a high telegram load can arise while setting and deactivating the device Planning overview It is possible to operate several zone terminals MT U 2 12 1 without an intruder alarm control unit In this configuration the device makes basic security functions available such as controlling the setting unsetting of the device triggering alarms and resetting the system Please note the following points e It is advisable to provide a backup supply for the EIB bus voltage and the 12 V DC supply voltage in the cas
6. out after an alarm to delete the alarm state A reset can only be carried out when the device is unset This process deletes and deactivates the alarm memory The reset request is received via the bus communication object Reset Switch off zones It is possible to switch off any zones via the bus If a zone is switched off it does not trigger any alarms or prevent the device from being set Zone terminal 2 fold FM ABB i bus EIB MT U 2 12 1 GH Q631 0060 R0111 3 Function and This section does not apply operation 4 Project design and programming 4 1 Communication objects The application software has ten 1 bit communication objects Some of the communication objects are dynamic and only visible if the corre sponding parameters have been activated in the application software es ETS2 Project Design Building View MT Ea ll 2 12 1 as Project Edit Design Options Wiew Window Help _ x Open Dar List Funct Groups Topo Catalog Fitter Sawe Help ElI Building Building pat OO Room Device fr Show Objects Phys Addi Product Order number Program Manufacturer no Function Object name Type Priority C R W T Li li ez 01 01 001 MTU 12 1 Zone Terminal 2 fold Fh ZH 26351 0060 RO111 Monitor Report 0 Status Zone Output Telegram Zone amp 1 Bit Auto wh oe ne 1 Status Zone E Output Telegram Zone O 1 Hit Auto st net sr 2 Seinset Request InputfOutput Telegram su 1 Bit Auto sr st nr
7. voltage triggers alarm Cyche sending of object Supply Voltage Fault Es Cyclic sending time base 10 gt Cyclic sending factor j 0 Cancel Default Info High Access Help Fault of supply voltage triggers alarm In the event of a fault in the 12 V DC supply voltage it can be set whether the communication object Alarm also contains the value 1 parameter va lue yes in addition to the communication object Supply Voltage Fault Cyclic sending of object Supply Voltage Fault The function Cyclic sending of object Supply Voltage Fault can be activa ted or deactivated The sending interval can be specified with the parameters Cyclic sending time base and Cyclic sending factor The time is calcula ted as follows Duration of the sending interval Base x Factor 11 Zone terminal 2 fold FM ABB i bus EIB MT U 2 12 1 GH Q631 0060 R0111 4 5 Parameter window The settings for the Test output are carried out in this parameter window Walk Test Edit Parameters Ez III Attention General Zones Supply Yoltage Walk Test Setting rming Walk Test after bus voltage recovery switched off switched on switched off Behaviour of output test time limited operation time limited operation O O O Switch ON duration time base 425 gt Switch ON duration factor 40 Cancel Default Into Hi
8. If various devices have different initiali sation periods a telegram overload on the bus can be prevented Zone terminal 2 fold FM ABB i bus EIB MT U 2 12 1 GH Q631 0060 R0111 Note The minimum period of 5 seconds corresponds to the minimum peri od in the technical specifications During this period the outputs Test and s u are undefined Send object values after bus voltage recovery With this parameter it can be set whether the communication objects 0 1 3 6 and 7 are sent on the bus after bus voltage recovery This can be used for example to update a central visualisation display Further information about the behaviour of the device during after bus volta ge recovery can be found under section 4 7 If device is set trigger alarm after bus voltage recovery This parameter determines whether an alarm is sent after bus voltage failure when the device is set The value is then only sent automatically on the bus if the parameter Send object values after bus voltage recovery has been set to yes Important To prevent false alarms this parameter should only be set to yes if a backup supply for the bus voltage is existing in the case of mains failure 4 3 Parameter window Settings for zones A and B are carried out in this parameter window Zones Edit Parameters gt III Attention General Ones Supply Woltage Walk Test Setting Aming 40 ms DLA 80 ms ms Possibility to s
9. User Manual ABB i bus EIB Zone terminal FM MT U 2 12 1 Intelligent Installation Systems ADD ABB i bus EIB El3 A ABB i bus EIB Zone terminal 2 fold FM MT U 2 12 1 GH Q631 0060 R0111 Contents Page 1 General 1 1 Product and functional overview 1 1 2 System benefits 2 Device configuration 2 1 Technical data zu zes nee arena ne 2 2 Device connection zu zu 4 au Erin aan 2 3 Description of the inputs and outputs 2 4 Functional overview 2 m mern 3 Function and operation 4 Project design and programming 4 1 Communication objects 4 2 Parameter window General 4 3 Parameter window Zones 4 4 Parameter window Supply Voltage 4 5 Parameter window Walk Test 4 6 Parameter window Setting Arming 4 7 Behaviour on bus voltage failure and recovery 4 8 Behaviour on supply voltage failure and recovery 5 Planning and application 5 1 Overview and general recommendations 5 2 Stand alone operation without central security logic 5 3 Operation in connection with intruder alarm control unit L208 6 Appendix 6 1 Ordering information This manual describes
10. d for the alarm control unit Assign the zones of the MT U 2 12 1 to zones 1 8 of the control unit Each of the zones 1 8 of the L208 can be triggered by the EIB via max 4 group addresses A maximum of 32 EIB zones are therefore possible which corresponds to 16 MT U 2 12 1 devices General Setting Unzsetting System Status one Status Alarm Transmission one Release EIB T amper 1 4 EIB T amper 5 8 Operation of the EIB inputs for Alarm Panel one 01 Alarm Panel Zone 02 Alarm Panel Zone 03 Disabled The EIB interface makes it possible to monitor the activity of the zone termi nal cyclically The communication object Supply Voltage Fault is used for this purpose In this example it is sent every 9 seconds on the bus Zone terminal 2 fold FM ABB i bus EIB MT U 2 12 1 GH Q631 0060 R0111 III Attention 1 General Zone Supply Voltage Walk Test Setting Arming Fault of supply voltage triggers alarm Em o ee Z Cyclic sending time base 1 0 Cyclic sending factor l The object Supply Voltage Fault is linked via a group address with an EIB Tamper communication object of the L208 EIB This is parameterised as follows on the EIB interface General Setting Unzetting System Status one Status Alarm Transmission one Release EIB Tamper 1 4 EIB T amper 5 8 Operation of the EIB T amper Inputs 1 4 EIB Tamper Input 1 Enabled with cyclic
11. e of mains failure e If the alarm system should distinguish between internal and external set outdoor and indoor detectors should be connected to different zone terminals 15 ABB i bus EIB 16 Zone terminal 2 fold FM MT U 2 12 1 GH Q631 0060 R0111 usw US U 4 1 a AT S x x x Ela nx MT U 2 12 1 Application description The following section describes the procedure for creating a linked alarm system from several MT U 2 12 1 devices Link the communication objects e Set Unset Request e Alarm e Reset with the same group address each You can thus ensure that basic security functions for setting the device issuing alarms and resetting the system are carried out together The parameters of the MT U 2 12 1 can remain in the default setting A minimum requirement for operating the alarm system apart from the arming device is a push button with a reset function An option for setting the device internally can also be provided for example If the user stays inside the building a so called internal set only activates the detectors for outdoor surveillance Since the zone terminal does not distinguish between the different ways of setting the device only the devices which are connected to the outdoor detectors are setted in this case When the system is set external
12. ers the user considerable advantages Clear operation The clear operation and display possibilities of EIB help to maintain an over view The building thus always informs the user in clear text about the current status of the building and security functions If necessary the user can also be alerted via telephone Economic efficiency New possibilities create economic benefits detectors have multiple functions A movement detector can thus switch the lighting when the alarm system is not set or the heating in the room is automatically lowered when a window is opened see diagram When the alarm system is set these same detectors protect the building from intruders Functions for convenience Central functions can also be triggered in the building when the system is set When leaving the building the lighting is switched off and the room tempera ture is reduced if the alarm system has been set When the system is unset the building creates pleasant lighting conditions for the occupants on their return The lighting can be switched and the room temperature can be controlled with the setting unsetting of the alarm system in the building ABB i bus EIB 2 1 Device configuration Technical data Power supply Inputs Outputs Operating and display elements Connections Miscellaneous Zone terminal 2 fold FM MT U 2 12 1 GH Q631 0060 R0111 The device functions of the MT U 2 12 1 are outlined in this
13. gh Access Help Walk test after bus voltage recovery It can be set whether the walk test function should be switched on or switched off after bus voltage failure Normal operation and time limited operation In the operating mode normal operation the Test output is switched on or off via the Walk Test communication object If the operating mode time limited operation is selected the output is switched off after a set interval This maximum operating time is calculated as follows Operating time Base x Factor 12 ABB i bus EIB 4 6 Parameter window Setting Arming Edit Parameters III Attention D Prevent setting if zone detects a fault Time delay of confirmation via object Set Confirmation Negative acknowledge via object Set Unset Request Behaviour of output sru Switch ON duration time base Switch ON duration factor Zone terminal 2 fold FM MT U 2 12 1 GH Q631 0060 R0111 The settings for behaviour on setting unsetting the device as well as the settings for the s u output are carried out in this parameter window General Zones Suppl Votage Wak Test Setting Arming yes 500 ms yes 1 05 200 mz Prevent setting if zone detects a fault 2 1 4 2 4 4 17 34 1 1 2 2 4 9 Ga En ea min min If a zone or the supply voltage has a fault or the Alarm communication ob jects displays an alarm it is nor
14. ly it is important to disable the internal ar ming device or to prevent unintentional operation The alarm can be issued for example via an EIB switch actuator with a siren and or flashing light These external devices that are outside the security area can also be monitored for tampering via an individual zone Important An external siren should only issue timed alarms typically 120 seconds Zone terminal 2 fold FM ABB i bus EIB MT U 2 12 1 GH Q631 0060 R0111 5 3 Operation in connection The interaction between the MT U and the intruder alarm control unit L208 with the intruder alarm with EIB interface L208 EIB application program Alarm Panel Interface 1 control unit L208 is described here Planning overview The intruder alarm control unit L208 with EIB interface L208 EIB can be extended by EIB detectors It is also possible to link professional security functions with the ease of operation of EIB Since the L208 takes over the central control of the security functions in this configuration the highest level of functionality and reliability is achieved Detectors can be connected to zones 1 to 8 of the control unit both conven tionally and via the EIB It is possible to carry up to four EIB signals logically to one zone of the control unit so that a maximum of 32 EIB zones can be managed The EIB zones can still be displayed individually on the EIB Up to 8 zone terminals can be monitored cyclically for activity
15. mally not possible to set the device Using this parameter it is however possible to specify that the device can be set in spite of an active signal fault or alarm parameter value no Note You should only modify this parameter in conjunction with an in truder alarm control unit or a central alarm logic which controls the arming of the device If an attempt is made to set the zone terminal when an active zone is triggered an alarm will imme diately be issued Negative acknowledge via object Set Unset Request If it not possible to set the zone terminal one device will normally respond to the request with the value 0 and thus reset other devices to the unset mode This negative acknowledgement can be prevented by selecting the parame ter value no 13 Zone terminal 2 fold FM ABB i bus EIB MT U 2 12 1 GH Q631 0060 R0111 Time delay of confirmation Using this parameter it is possible to set a delay between the setting of the device and the confirmation that the device is set via the communication object Set Confirmation and the output s u Normal operation and time limited operation During normal operation the voltage at the s u output in set mode is 12 V when the device is deactivated the voltage at the output is O V high resistance If the operating mode time limited operation is selected the output is swit ched off after a set interval This maximum operati
16. minals 1 to 4 The device has 2 zone inputs terminal pairs 1 2 and 3 4 The zones are provided with EOL resistors of 2 7 kQ The zone input is undisrupted if the resistance value deviates from the refe rence value of 2 7 KQ by less than approx 200 Q Important To enable the zone terminal to function correctly even un used zone inputs must be terminated with a 2 7 kQ resistor This can be carried out directly at the input terminals Walk test output terminal 5 Test The Test output is a 12 V DC transistor output The Walk test function of passive infrared detectors can be activated with this output bileh diakre a Set unset output terminal 6 s u The s u output is a 12 V DC transistor output which indicates whether the zone terminal is activated or deactivated Deviceunset Deviceset s u output 0 V high resistance 12 V 1 5 KQ O1 ABB i bus EIB 2 4 Functional overview Zone terminal 2 fold FM MT U 2 12 1 GH Q631 0060 R0111 Supply voltage inputs terminals 7 and 8 The required 12 V DC supply voltage is connected at this point terminal 7 12 V DC terminal 8 0 V DC Terminal 8 is also used as the common refe rence potential for the outputs Test and s u Setting The zone terminal is set via the EIB communication object Set Unset Request When the zone terminal is set it is triggered by a fault in one of the zones
17. monitoring EIB Tamper Input 2 Disabled Within 30 seconds of the monitoring time the communication object Supply Voltage Fault of the zone terminal would have to be sent at least 3 times on the bus 9 x 3 27 If it is missing during this period or sends the value 1 a tamper alarm is triggered on the control unit Caution The L208 EIB has 8 EIB Tamper communication objects and can therefore monitor the activity of max 8 devices cyclically Further zone terminals can display a supply voltage fault by linking the communication object Supply Voltage Fault with an EIB Tamper object without the cyclical sending function Note Cyclical monitoring of activity can lead to a high telegram load on the bus Please take this into consideration when setting the cyclic interval and monitoring period 19 Zone terminal 2 fold FM ABB i bus EIB MT U 2 12 1 GH Q631 0060 R0111 6 Appendix 6 1 Ordering information Description Ordering info bbn Unit Pack 40 16779 weight units Short description Order no EAN in kg Zone terminal FM MT U 2 12 1 GH Q631 0060R0111 51380 7 0 05 1 20 AA ED ER FAIDID ABB STOTZ KONTAKT GmbH Postfach 10 16 80 D 69006 Heidelberg Telefon 06221 701 434 Telefax 06221 701 724 www abb stotz kontakt de Publication No G SK 09098 01 S0201
18. ng time is calculated as follows Operating time Base x Factor 4 7 Behaviour on bus voltage During a bus voltage failure all the outputs and zone inputs are switched off failure and recovery 0 V After bus voltage recovery the device waits for an adjustable initialisation period During this interval no telegrams are sent on the bus and the status of the outputs remains unchanged Any received telegrams are detected approx 5 seconds after bus voltage recovery Provided that the relevant settings have been made in the parameters the device sends the following communication objects on the bus on bus voltage recovery Object 0 Status Zone A Object 1 Status Zone B Object 3 Alarm Object 6 Supply Voltage Fault Object 7 Set Confirmation The set unset state of the device remains unchanged after bus voltage recovery 4 8 Behaviour on supply voltage If the 12 V supply voltage of the device fails the device sends the value 1 failure and recovery to the communication object Supply Voltage Fault The zones cannot be evaluated without supply voltage and the display of the zones on the bus is thus undefined If the device is armed the communication object Alarm is set to 1 and sent provided that the relevant parameter settings have been selected No alarms are sent when the device is unset The fault signal of a zone can only be deleted by a reset when the device is unset The deletion
19. on The communication object Set Confirmation contains the current state of the zone terminal The status is sent on the bus once the device has been successfully set or unset Bd Telegram value 0 Telegram value 1 Status Note This communication object can generate a high telegram load on the bus when many devices are set or unset If the state of an alarm system is to be displayed on several zone terminals MT U 2 12 1 the communication object Set Unset Request is more suitable Switch Off Zone A B Zones can be switched off individually A disconnected zone does not trigger any alarms and does not prevent the device from being set its status is dis played on the bus BS Telegram value 0 Telegram value 1 Function Switched on Switched off of the zone 4 2 Parameter window General settings for the device are carried out in the General parameter General window Edit Parameters I Attention 111 General Zones Supply Voltage Walk Test Setting Aming ae mm A HN ata ed buz vek en en i 20 3 De de 30 s iz Cancel Default Into High Access Help Activate alarm memory The alarm memory is normally activated in the alarm state This can be pre vented by setting the parameter value to no Inactive waiting time after bus voltage recovery The initialisation time determines the period when no telegrams are sent by the device after bus voltage recovery
20. section Supply voltage Bus voltage 2 zones 2 control outputs Red LED and push button Conductor cross section ABB i bus EIB Type of protection CE mark Operating temperature rang Installation Dimensions x H Weight 12 V DC 2V SELV Residual ripple lt 1 0 Vss Power consumption lt 35 mA typ 25 mA via the ABB i bus EIB Power consumption lt 10 mA AandB Primary circuit EOL resistor 2 7 kQ Open circuit voltage 12 V DC Short circuit current max 6 mA Permitted cable resistance max 200 Q Set unset Walk test Output impedance 1 5 kQ For entering the physical address 0 2 1 mm Bus connecting terminal IP 20 according to DIN EN 60 529 According to EN 50090 2 2 EMC guideline and low voltage guideline 5 C to 45 C In flush type box 55 mm 54 x 28 mm 0 05 kg ABB i bus EIB 2 2 Device connection 2 3 Description of the inputs and outputs Zone terminal 2 fold FM MT U 2 12 1 GH Q631 0060 R0111 Supply voltage 12 V DC to movement detector s u 12 V_ Test 12 V_ tl EOL resistor 2 7 KQ FADED MT U 2 12 1 EOL resistor 2 7 KQ ABB i bus EIB Un 12V DC Detector contacts Note The MT U 2 12 1 requires an external power supply of 12 V DC A backup supply for the EIB bus voltage in the event of mains failure is recommended for security applications Zone inputs ter
21. the function of the EIB zone terminal MT U 2 12 1 Subject to change without prior notice Irrtumer vorbehalten O 0 O1 A 10 11 12 13 14 14 15 15 17 20 ABB i bus EIB 1 General 1 1 Product and functional overview Zone terminal 2 fold FM MT U 2 12 1 GH Q631 0060 R0111 The zone terminal MT U 2 12 1 is used for the monitored connection of sen sors from security technology to the ABB i bus EIB The device has two monitored circuits zones available which continuously supervise an EOL resistor of 2 7 KQ The device thus offers security against deliberate or unintentional disconnection short circuiting of the detector zones Since the device is flush mounted it can be positioned in the vicinity of the detectors It is suitable for the connection of conventional detectors such as e magnetic contacts e passive infrared movement detectors glass breakage sensors The connection of potential free contacts is possible in applications with increased security requirements J ERW 1 1 MT U 2 12 1 lo nm N 27 US U 4 1 Ela Diagram 1 Example of room monitoring with lighting and heating control ABB i bus EIB 1 2 System benefits Zone terminal 2 fold FM MT U 2 12 1 GH Q631 0060 R0111 The connection of EIB to security technology off
22. witch off zone A NETE ossibility to switch off zone 120 via object a El me dk one B triggers alarm a El eens Possibility to switch off zone B yes AE sanss ia object n Cancel Default Into High Access Help Debounce time With the parameter Debounce time it is possible to support the bouncing of the detector contacts and the zone inputs This prevents telegrams from being sent unnecessarily 10 Zone terminal 2 fold FM ABB i bus EIB MT U 2 12 1 GH Q631 0060 R0111 Zone triggers alarm If the parameter value is selected as no the value of the object Alarm is not set to 1 after a fault in this zone when the device is set The alarm memory is also disabled for this zone and a signal does not prevent the device from being set Possibility to switch off zone via object If this parameter is set to yes the zone can be switched off via the commu nication object Switch Off Zone A B A disconnected zone does not trigger an alarm and does not prevent the device from being set its status is still displayed on the bus 4 4 Parameter window Settings for the communication object Supply Voltage Fault are carried out Supply Voltage in this parameter window This can for example be used to monitor the pre sence of the device Edit Parameters x III Attention General Zones Supply Voltage Walk Test 5 ellir qA a rm lna Fault of supply
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