A Series Ethernet Interface Module User`s Manual (Hardware)
Contents
1. Avizrines oe Q LO N Annn 4 2 106 i 37 5 Unit mm in 0 17 4 17 1 48 4 A1SJ71E71N3 T _ ray aes a 5 O oO A R1 A1SJ71E71N3 T j 3 6 5 94 34 5 Unit mm in 0 26 3 70 g 1 36 x3 When connecting the twisted pair cable make the bend radius R1 scale value in the vicinity of the connector to cable outside diameter x 4 or more 13 5 A1SJ71E71N B5 Ft A1SJ71E71N B5 RUN BUF1 RDY BUF2 BSY BUF3 SW ERR COM ERR BUF5 TEST ERR BUF7 CPU R W BUF8 130 5 12 10BASES A bam fi A1SJ71E71N B5 6 5 94 7 5 34 5 Unit mm in ar EEA A 0 26 3 70 0 30 1 36 x4 When connecting the AUI cable make the bend radius R2 scale value in the vicinity of the connector to cable outside diameter x 4 or more 6 A1SJ71E71N B2 F A1SJ71E71N B2 RUN BUF1 RDY BUF2 BSY BUF3 SW ERR COM ERR BUF5 TEST ERR BUF7 CPU R W BUF8 O ONLINE 1 OFFLINI 130 5 122. t bad ee A1SU71E71N B2 6 5 l 94 34 5 Unit mm in 0 26 3 70 1 36 Ethernet is the registered trademark of XEROX CO LTD 10BASE2 is the formal way to say Cheapernet here is no registered trademark for Cheapernet 14 Warranty Mitsubishi will not be held liable for damage caused by factors found not to be the cause of Mitsubishi machine damage or lost profits caused by faults in the Mitsubishi products damage secondary damage accident compensation caused by special factors unpredictable by Mitsubishi damages to products other than Mitsubishi products and to other duties For safe use e This product has been manufactured as a general purpose part for general industries and has not been designed or manufactured to be incorporated in a device or system used in purposes related to human life e Before using the product for special purposes such as nuclear power electric power aerospace medicine or passenger movement vehicles consult with Mitsubishi e This product has been manufactured under strict quality control However when installing the product where major accidents or losses could occur if the product fails install appropriate backup or failsafe functions in the system Country Region Sales office Tel Country Region Sales office Tel U S A Mitsubishi Electric Automation Inc Hong Kong Ryoden Automation Ltd 500 Corporate Woods Parkway Vernon 10th Floor Manulife Tower
3. 169 Electric Hills IL 60061 Road North Point HongKong Tel 1 847 478 2100 Tel 852 2887 8870 Brazil MELCO TEC Rep Com e Assessoria China Ryoden Automation Shanghai Ltd Tecnica Ltda 3F Block5 Building Automation AV Paulista 1471 Conj 308 Instrumentation Plaza 103 Cao Bao Rd Sao Paulo City Sao Paulo State Shanghai 200233 China Brazil Tel 86 21 6475 3228 Tel 55 11 283 2423 Taiwan Setsuyo Enterprise Co Ltd Germany Mitsubishi Electric Europe B V German 6F No 105 Wu Kung 3rd RD Wu Ku Branch Hsiang Taipei Hsine Taiwan Gothaer Strasse 8 D 40880 Ratingen Tel 886 2 2299 2499 GERMANY Korea HAN NEUNG TECHNO CO LTD Tel 49 2102 486 0 1F Dong Seo Game Channel Bldg U K Mitsubishi Electric Europe B V UK 660 11 Deungchon dong Kangsec ku Branch Seoul Korea Travellers Lane Hatfield Herts AL10 Tel 82 2 3660 9552 8XB UK Singapore Mitsubishi Electric Asia Pte Ltd Tel 44 1707 276100 307 ALEXANDRA ROAD 05 01 02 Italy Mitsubishi Electric Europe B V Italian MITSUBISHI ELECTRIC BUILDING Branch SINGAPORE 159943 Centro Dir Colleoni Pal Perseo Ingr 2 Tel 65 6473 2308 Via Paracelso 12 20041 Agrate B Thailand F A Tech Co Ltd E Milano Italy 898 28 29 30 S V City Building Office Tel 39 039 6053344 Tower 2 Floor 17 18 Rama 3 Road Spain Mitsubishi Electric Europe B V Spanish Bangkpongpang Yannawa Branch Bangkok 10120 Carretera de Rubi 76 80 Tel 66 2 682 6522 08190 Sant Cugat del Valles Indones
4. A1SJ71E71N3 T RDY BUF2 BSY BUF3 SHER RUE fet Bure lt 1 4 AJ71E71N B5 AJ71E71N B5 RUN BUFY BUE2 RDY BUFS BUES SW ERR BUFS COMERR BUF CPU RW TEST TEST EPR z iS IS M zan BABE Naz l 2 N mm ow 10BASE5 A1SJ71E71N B5 A1SJ71E71N B5 O ONLINE 1 OFFLINE 2 TEST1 3 TEST2 4 TEST3 10BASES EXT PW A1SJ71E71N B5 x1 The LED provided on the connector does not light up E 1 AJ71E71N B2 AJ71 71N B2 RUN BUFY RDY BUFS Y SW ERR BUFS COMERR BUF CPURW BUF BUFS 1 8 A1SJ71E71N B2 A1SJ71E71N B2 RUN BUF1 RDY BUF2 BSY BUF3 SW ERR BUF4 COM ERR BUF5 TEST BUF6 TEST ERR BUF7 CPU R W BUF8 MODE O ONLINE 1 OFFLINE gees on 3 See 4 TEST3 ia SW1 o Swe 0 Sws o sw4 i sws i Swe 0 sw7 0 sws 0 OFF ON A1SJ71E71N B2 No Designation Contents Displa LED Refer to i 2 Operation mode setting switch Refer to 3 Exchange condition setting Refer to switch 10BASE T connector RJ45 Connector for connecting the E71 to the 10BASE T Lamp for verifying if power is being supplied to the 5 External power supply transceiver indicator lamp ON Power supplying OFF Power n
5. Connection to a Network cnu9ot in Lert tcadsenieecs eames teclnes tesond cosiaedl obits evened i 10 5 1 Connecting to the 10BASE T AJ71E71N3 T A1SJ71E71N8 T s es 11 5 2 Connecting to the 10BASE5 AJ71E71N B5 A1SJ71E71N BS5 eseese 11 5 3 Connecting to the 10BASE2 AJ71E71N B2 A1SJ71E71N B2 iessen 11 External Dimensions lt i 8 2c eet Rei aha edt elt hale tite thee decade nee tanhcnit and ULcs 12 About the Manuals The following product are available for this equipment Refer to the table given below to choose suitable manuals Related Manual Manual No Tn SH 080192 For A Ethernet Interface Module User s Manual 13JR45 Conformation to the EMC Directive and Low Voltage Instruction For details on making Mitsubishi PLC conform to the EMC directive and low voltage instruction when installing it in your product please refer to Chapter 3 EMC Directive and Low Voltage Instruction of the User s Manual Hardware for the CPU module to use The CE logo is printed on the rating plate on the main body of the PLC that conforms to the EMC directive and low voltage instruction For information about conforming this product to the EMC directive and low voltage instruction please refer to Chapter 3 EMC Directive and low Voltage Instruction section 3 1 3 Cable of the User s Manual Hardware for the CPU module to use 1 Overview This manual explains how to install the following Ethernet interface modules abbreviated as
6. E71 hereafter for A series PLC CPU and how to wire them with external devices After unpacking E71 verify that the following parts are contained AJ71E71N3 T AJ71E71N3 T type Ethernet Interface Module AJ71E71N B5 AJ71E71N B5 type Ethernet Interface Module AJ71E71N B2 AJ71E71N B2 type Ethernet Interface Module F type Connector A6RCON F A1SJ71E71N3 T A1SJ71E71N3 T type Ethernet Interface Module A1SJ71E71N B5 A1SJ71E71N B5 type Ethernet Interface Module A1SJ71E71N B2 type Ethernet Interface Module PISJTIE AN B2 eave Gonneclor AGRCOME 2 Performance Specifications The performance specifications of E71 is shown below See CPU module user s manual to be used for E71 general specifications Specifications gt sid em AJ71E71N3 T A1SJ71E71N3 T booo O 10BASET O YOS speed Half duplex Transmission method Transmision Maximum distance TETON between nodes specifications Maimam 6ament g 100 m 328 08 ft length Maximum number of Cascade connection is a maximum 4 stages nodes connection Minimum node interval Number of allowable data storage connectors memory Random access buffer 3 k word x 2 Number of remote nodes that can be communicated in a single initial No restrictions processing 32 points 1 slot I O assignments special 32 points AJ71E71N3 T 0 69A A1SJ71E71N3 T 0 69A Unshielded twisted pair cable UTP or shielded twisted pair cable STP rated in category 3 4 or 5 capacity for transceiver AJ7
7. 1E71N3 T 250 9 84 H x 37 5 1 48 W x 106 4 17 D mm in A1SJ71E71N3 T 130 5 12 H x 34 5 1 36 W x 94 3 70 D mm in All do not include the protruded section on the front surface We AJ71E71N3 T 0 30 kg 0 66lb 9 A1SJ71E71N3 T 0 17 kg 0 371b 5 V DC internal current consumption External dimensions Specifications AJ71E71N B5 AJ71E71N B2 A1SJ71E71N B5 A1SJ71E71N B2 10BASE5 10BASE2 speed Half duplex Transmission method ae Maximum distance Transmission 2500 m 8202 10 ft 925 m 3034 77 ft speaiiications Maximum segment hath 9 500 m 1640 42 ft 185 m 606 96 ft Meo number ol 100 nodes per segment 30 nodes per segment nodes connection Minimum node interval 2 5 m 8 20 ft 0 5 m 1 64 ft Number of allowable Transmission Simultaneously open 8 connections data storage connectors memory Fixed buffer 1k word x 8 Random access buffer 3 k word x 2 Number of remote nodes that can be communicated in a single initial No restrictions processing Number of occupied I O points 5 V DC internal current consumption AJ71E71N B5 0 55A AJ71E71N B2 0 67A A1SJ71E71N B5 0 57A A1SJ71E71N B2 0 66A Twisted pair cable RG58A U RG58C U capacity for transceiver AJ71E71N B5 AJ71E71N B2 250 9 84 H x 37 5 1 48 W x 106 4 17 D mm in A1SJ71E71N B5 A1SJ71E71N B2 130 5 12 H x 34 5 1 36 W x 94 3 70 D mm in All do not include the protruded sec
8. MITSUBISHI A Series Ethernet Interface Module User s Manual Hardware AJ71E71N3 T A1SJ71E71N3 T AJ71E71N B5 A1SJ71E71N B5 AJ71E71N B2 A1SJ71E71N B2 Thank you for buying the Mitsubishi general purpose programmable logic controller MELSEC A Series Prior to use please read both this manual and detailed manual thoroughly and familiarize yourself with the product MODEL AJ71E71N U HW MEISEC IB NA 0800308 B 0412 MEE 2004 MITSUBISHI ELECTRIC CORPORATION SAFETY PRECAUTIONS Always read before starting use When using Mitsubishi equipment thoroughly read this manual and the associated manuals introduced in the manual Also pay careful attention to safety and handle the module properly These precautions apply only to the installation of Mitsubishi equipment and the wiring with the external device Refer to the user s manual of the CPU module to be used for a description of the PLC system safety precautions These e SAFETY PRECAUTIONS e classify the safety precautions into two categories DANGER and CAUTION Ne Le Ee tte NCL Re pte ian ene Sat nk ane ea ge tiaet tah oe Procedures which may lead to a dangerous condition and cause lt gt DANGER death or serious injury if not carried out properly Procedures which may lead to a dangerous condition and cause CAUTION superficial to medium injury or physical damage only if not carried out properly Depending on circumstances procedures indica
9. hases of the external power supply off before mounting or removing the module If you do not switch off the external power supply it will cause electric shock or damage to the product Do not touch the electronic parts or the module conducting area directly It may cause erroneous operation or failure WIRING PRECAUTIONS CAUTION Perform correct pressure displacement crimp contact or soldering for external wire connections using the tools specified by the manufactures Incorrect connection may cause short circuits fire or malfunction Attach connector to the module securely Be sure to fix communication cables or power supply cables leading from the module by placing them in the duct or clamping them Cables not placed in the duct or without clamping may hang or shift alllowing them to be accidentally pulled which may cause a module malfunction and cable damage Tighten the screw within the range of specified torque If the screws are loose it may result in short circuits or malfunction Tightening the screws to far may cause damage to the screw and or the module resulting in fallout short circuits or malfunction Do not grab on the cable when removing the communication cable connected to the module When removing the cable with a connector hold the connector on the side that is connected to the module When removing the cable connected to the terminal block first loosen the screws on the part that is con
10. hat emits signals to notify whether the transceiver is operating normally at the end of communication 5 3 Connecting to the 1OBASE2 AJ71E71N B2 A1SJ71E71N B2 lt Connection procedure gt 2 1 Push in the connector by aligning the groove 1 and tab 2 as shown in the figure 2 While pushing in the connector rotate it clockwise by a 1 4 turn 3 Turn until the connector locks 2 4 Confirm that the connector is locked a For AJ71E71N B2 11 6 External Dimensions 1 AJ71E71 250 9 84 N3 T le tt 4 2 106 4 17 0 17 J71E71N3 T TEST TEST ERR Unit mm in 1 When connecting the twisted pair cable make the bend radius R1 scale value in the vicinity of the connector to cable outside diameter x 4 or more 2 AJ71E71N B5 g 3 m E R2 y n Mnn 2 4 2 106 Li 4 0 17 4 17 0 55 Ag71E71N B5 TEST TEST EAR ExTew Unit mm in x2 When connecting the AUI cable make the bend radius R2 scale value in the vicinity of the connector to cable outside diameter x 4 or more 12 3 AJ71E71N B2
11. ia P T Autoteknindo SUMBER MAKMUR Barcelona Spain Jl Muara Karang Selatan Block A Utara Tel 34 93 565 3131 No 1 Kav No 11 Kawasan Industri France Mitsubishi Electric Europe B V French Pergudangan Jakarta Utara 14440 Branch i ie PEN i ndia essun stems Put Ltd go POU evard des BOUVeIS F 92421 Electronic Sadan NO 111 Unit No15 Nanterre Cedex France M I D C BHOSARI PUNE 41 1026 TEL 33 1 5568 5568 Tel 91 20 712 2807 South Africa Circuit Breaker Industries LTD Australia Mitsubishi Electric Australia Pty Ltd Tripswitch Drive Elandsfontein Gauteng 348 Victoria Road PostalBag No 2 South Africa Rydalmere N S W 2116 Australia Tel 27 11 928 2000 Tel 61 2 9684 7777 a MITSUBISHI ELECTRIC CORPORATION HEAD OFFICE 1 8 12 OFFICE TOWER Z 14F HARUMI CHUO KU 104 6212 JAPAN NAGOYA WORKS 1 14 YADA MINAMI 5 CHOME HIGASHI KU NAGOYA JAPAN Specifications subject to change without notice Printed in Japan on recycled paper
12. iming setting x1 Set to OFF for normal use When a TCP ULP time out error error code 9059H occurs due to data transfer from remote node while this switch is set to ON run the close and open operations with the sequence program x2 Set to OFF for normal use x3 When the hardware version is B or later the communications exchange condition setting switches for the A1SJ71E71N B5 are as shown below sw l SW8 4 Loading and Installation The following is explanations of the handling precautions and installation environment which is common to modules when handling E71 from unpacking to installation For the details of loading and installation of the module refer to User s Manual of CPU module to be used 4 1 Handling Precautions The following is an explanation of handling precautions of the module 1 Because the case of the module is made of resin be careful not to drop it or expose it to strong impact 2 Always make sure to touch the grounded metal to discharge the electricity charged in the body etc before touching the module Failure to do so may cause a failure or malfunctions of the module 3 Execute tightening of the module s installation screws within the range indicated below Screw position Tightening torque range External power supply terminal AJ71E71N B5 98 to 137 N cm M4 screw screw 1 A1SJ71E71N B5 40 N cm M2 5 screw Module fixing screw 78 to 118 N c
13. m M4 screw x1 This terminal is used as an external power input terminal for supplying power to the transceiver when being connected to a 10BASE5 4 2 Installation Environment Refer to User s Manual of CPU module to be used 5 Connection to a Network The following is an explanation of the connection method of the E71 to the 10BASE T 10BASE5 or the 10BASE2 1 Installation procedures of the network require sufficient safety measures For the execution of such operations as terminal processing of connection cable trunk line cable etc please consult with a trained professional 2 When the customer s products match the EMC instructions and the low voltage instructions for connecting E71 use the method in 4 below to install the ferrite core 3 When there is a communication error caused by high frequency noise due to the installation environment take the following steps e The ferrite core can be installed using the steps in 4 below e When communicating with TCP IP increase the count of communication retries e When connecting to 10BASE T use a shielded twisted pair cable STP rated in category 3 4 or 5 e When connecting to 10BASE2 use a double shielded coaxial cable e When connecting to 10BASE5 or 10BASE2 ground the shield of the coaxial cable at both the local station and companion connected device Ground at a place near the connector 4 Below are the steps for installing the ferrite core based on connec
14. nected to the terminal block Pulling the cable that is still connected to the module may cause a malfunction or damage to the module or cable Solder coaxial cable connectors properly Insufficient soldering may cause malfunction Be sure that cuttings wire chips or other foreign matter do not enter the module Foreign matter may start a fire or cause an accident or erroneous operation Revisions The manual number is noted at the lower right of the top cover IB NA 0800308 A Dec 2004 IB NA 0800308 B_ Additional model AJ71E71N83 T A1SJ71E71N3 T Deleted model AJ71E71N T A1SJ71E71N T This manual confers no industrial property rights or any rights of any other kind nor does it confer any patent licenses Mitsubishi Electric Corporation cannot be held responsible for any problems involving industrial property rights which may occur as a result of using the contents noted in this manual 2004 MITSUBISHI ELECTRIC CORPORATION A 4 AOUN CONTENTS SWINE WW AO OE E EEEE E EI A aun IE E EE E E E T 1 Performance SpecifiCatoNS e n actions heat ea a Saat lak Sur E AE E et carat tes 2 Settings and Names of Each Part i ccecieceeeeeceeeiee ieee bep veers etd ced ces decemeseedeneed cagccecmenbesdalauedee 5 Loading and Installation 2s ness cts es os A Os MO ie EN ls A ee he Oa Ae 9 41 Handling PC ITE ONS merene a e a a a a a aa kav eee 9 4 2 Installation EMVirOMMenl sieni a A tote elit 9
15. operation mode Usually set to on line Operation mode Setting Setting Performs exchange with remote node in the On line normal operation mode Off line Disconnects the local station from the network loopback test 3 Test2_ __ Performsa RAM test Usage notimpossible 5toF Usage not impossible This is set at 0 on line at the time of shipping from factory Communications exchange condition setting switch setting ee the conditions for data communication with other nodes Communications Settin exchange condition Switch 9 Setting contents designation setting switch Li l Selects the line processing when the TCP Ma PORR ULP time out error occurrence 1 os EER ee Close the circuit Do not close the circuit Selects the type of data code for exchanging data with the remote node OFF Conducts exchange in binary code Conducts exchange in ASCII code Usage not possible Fixed to OFF Data code setting Selects whether to approve or forbid data arriving from the remote node when a PLC OF U exchange CPU is running ee ey Selects the initial processing starts up timing 2 Quick start starts without a delay time Set when one network is used for the entire configuration Normal start start after a delay of 20 seconds Use when the entire configurations is made up of multiple networks This is set at OFF at the time of shipping from factory Initial t
16. ot supplied Power source terminals for power source supply to 6 External power supply the transceiver terminal AJ71E71N B5 14 08 V to 15 75 V A1SJ71E71N B5 13 28 V to 15 75 V Connector for connecting the E71 to the 10BASE5 For connection of 1OBASE5 use AUI cable ee cable 8 10BASE2connector___ Connector for connecting the E71 to the 10BASE2 _ 1 Display LED display contents Display LED Display contents When lamp is lit Lamp is not lit Rouimelioperalloicispiey fo fpem eenaa eam Exchange processing executing See ean femore noes remote node is emg Scouse executed ee ee processing executing cpuRw PUY cprurw Re PLC CPU P ee BUF1 to Display of communication line BUF8 connection status of connection Open completed Closed status No n corresponding to BUFn test Self Self diagnostic executing display executing display Self diagnostic executing display Se diagnosis comple shee oe ERR _ Self diagnosis results display Normal sd Exchanging Not exchanging The order of the display LEDs is shown below AJ71E71N3 T AJ71E71N B5 A1SJ71E71N3 T A1SJ71E71N B5 AJ71E71N B2 A1SJ71E71N B2 RUN oO BUFI RUN O O BUF1 O O BUF2 RDY oO BUF2 RDY a S ane BSY o BUFS3 BSY SW ERR O o BUF4 eA E COM ERR O O BUFS5 CPU R W O BUF7 TEST o BUF6 z 2 BUF8 TEST ERR O BUF7 oo CPU R WoO oO BUF8 O O O O O O TEST O O TEST ERR O O O O 2 Operation mode setting switch setting Set the E71
17. ted by Z CAUTION may also be linked to serious results In any case it is important to follow the directions for usage Store this manual in a safe place so that you can take it out and read it whenever necessary Always forward it to the end user DESIGN PRECAUTIONS CAUTION When laying the control wire or communication cable do not bundle with or place near main circuit or power line Keep them at least 100 mm 3 94 in away from such cables Noise may cause erroneous operation INSTALLATION PRECAUTIONS CAUTION Use the PLC in the environment given in the general specifications section of the user s manual to be used Using the PLC outside the range of the general specifications may result in electric shock fire or erroneous operation or may damage or degrade the product nsert the fixing latch on the bottom of the module into the fixing hole in the base unit and install the module using the hole point as a fulcrum The AnS series module shall be fastened by screws in the base unit at the specified torque Not installing the module correctly could result in erroneous operation damage or pieces of the product falling Tighten the screw within the range of specified torque If the screws are loose it may result in fallout short circuits or malfunction Tightening the screws to far may cause damage to the screw and or the module resulting in fallout short circuits or malfunction Make sure to switch all p
18. tion on the front surface AJ71E71N B5 AJ71E71N B2 0 33 kg 0 73lb 0 35 kg 0 77Ib A1SJ71E71N B5 A1SJ71E71N B2 0 20 kg 0 44lb 73 0 21 kg 0 46lb 73 External dimensions x1 Length between hub and node 2 It is required to use the one that satisfies the specifications of the transceiver and the AUI cable Also for the AJ71E71N B5 the voltage drop Max 0 8V must be taken into account x3 When the hardware version is A the weight is as follows A1SJ71E71N B5 0 19kg 0 42Ib A1SJ71E71N B2 0 20kg 0 44lb 1 Each item in the transmission specifications gives supplementary explanation e When connected by 10BASE2 10BASE5 Segment length Maximum distance between nodes Segment length e When connected by 10BASE T Hub 20000006 Maximum 100 m Cascade connection 328 08 ft is amaximum of 4 stages 2 Hardware specifications for E71 are based on IEEE802 3 Segment length 3 Settings and Names of Each Part Side view indicated by arrow A AJ71E71N3 T co Ag71 71N3 T RUN RDY tutunun TEST TEST ERR 10BASE T A1SJ71E71N3 T A1SJ71E71N3 T RUN BUF1 TESTERR BUF CPUR W BUF8 O ONLINE 1 OFFLINE 2 TESTI 3 TEST2 4 TEST3 10BASE T
19. tion to the 10BASE5 network Please install the ferrite core 1 on the side of the E71 or external devices the AUI cables transceiver x1 It is possible to use a TDK Corporation style ZCAT 2032 0930 For 10BASE5 connection AUI cable Coaxial cable Ferrite core y for 10BASE5 Transceiver 5 When using A1SJ71E71N B5 when the FG signal is regulated on the side of the external power supply of the original power supply for the transceiver ground the FG signal at the original power supply 5 1 Connecting to the 1OBASE T AJ71E71N3 T A1SJ71E71N3 T lt Connection procedure gt 1 Connect the twisted pair cable and the hub 2 Connect the twisted pair cable to the E71 For AJ71E71N3 T 5 2 Connecting to the 10BASE5 AJ71E71N B5 A1SJ71E71N B5 Supply power lt Connection procedure gt 1 for transceiver 1 Slide the retainer toward the direction A as shown in the figure AUI Cable 2 Push in the AUI cable connector all the way 3 Slide the retainer toward the direction B as shown in the figure B 4 Confirm that the AUI cable is locked 5 Supply power to the transceiver 2 Refer to 2 in Chapter 2 For AJ71E71N B5 1 Connect the AUI cable while the power to the module mounting station is turned off x2 Use a transceiver with a function that is generally called SQETEST or heart beat a transceiver function t
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