I-7531 User Manual
Contents
1. 13 Application Architecture aaneen nennen een enennnennenennennen 15 Dimension and Mounting rmberendsen 16 l 7531 CAN Repeater User Manual ver 1 5 2012 11 22 2 2 Introduction The l 7531 is a CAN repeater used to establish a physical coupling of two or more segments of a CAN bus system User can implement tree or star topologies as well as for long drop lines with l 7531 Connecting via l 7531 the division of a CAN system into several subsystems increases the maximum number of bus nodes Notebook SCADA InduSoft l 7530 I 7540D Ethernet x AFAQ ES Re Amplify Re Shape 4 CAN Signal SEA 9 TW CAN Network I 31 iPAC WinPAC LinPAC XPAC Figure1 Application of l 7531 The 1 7531 is an optically isolated CAN repeater which provides 2500 Vims optical isolation allowing you to separate and protect critical segments of the system from the rest of the CAN network And its galvanic isolation isolates both CAN segments from each other as well as from the power supply The CAN connection of l 7531 is by terminal blocks A power supply of 10 30 Vic is required The l 7531 is housed in a rugged DIN Rail mountable box making it easy to install in an industrial cabinet Therefore 1 7531 can be used in CANopen DeviceNet and generic ISO 11898 2 standard If user wants to know more detail information about the 1 7531 please visit our website as follow http www icpdas com products Re2. The l 7531 CAN Repeater User s Manual Warranty All products manufactured by ICP DAS are under warranty regarding defective materials for a period of one year from the date of delivery to the original purchaser Warning ICP DAS assumes no liability for damages resulting from the use of this product ICP DAS reserves the right to change this manual at any time without notice The information furnished by ICP DAS is believed to be accurate and reliable However no responsibility is assumed by ICP DAS for its use or for any infringements of patents or other rights of third parties resulting from its use Copyright Copyright 1997 by ICP DAS All rights are reserved Trademark The names used for identification only may be registered trademarks of their respective companies l 7531 CAN Repeater User Manual ver 1 5 2012 11 22 1 Tables of Content Tables of CoOntellb uss A dde tteok 2 OO T dc en 3 21 POUSSE TI TRITT 4 2 4 SDECHICALIONS 8 0 Lee a a nt tance 4 2 9 JADDIICQUOIL renee te a 4 Tecpnnicaldalg de a MEIN EE 5 del IBIOCK ABIT gn EE ESI 5 9 2 SAD PCAC eee D np a 6 94 PIR ASSIONMENE aa ide anse tenoren neden verveend 7 3 4 Wire Connection aannemen eene nennen eenmensenrnensnneens 9 30 ats LED ER 10 3 6 Terminator Resistor Setting eese 10 9 4 Cable SelectIOD ardennen a e ME EEUU 12 3 8 Driving Capability and Baud Rate
3. 0 terminator resistors user can decide to enable those two terminator resistors or not The JP2 of l 7531 is used for adjusting terminal resistor on CAN Port 1 and the JP3 of l 7531 is used for adjusting terminal resistor on CAN Port 2 Before adjusting JP2 or JP3 of l 7531 user needs to open the cover of l 7531 first Those locations of JP2 and JP3 are shown as following Figure7 JP2 and JP3 positions The following connection statuses present the condition if the terminal resistor is enabled default or disabled Disable Enable Deactivate Activate Figure8 Adjustment of Terminator Resistor l 7531 CAN Repeater User Manual ver 1 5 2012 11 22 11 3 Cable Selection The CAN bus is a balanced differential 2 wire interface running over either a Shielded Twisted Pair STP Un shielded Twisted Pair UTP or Ribbon cable The table below show recommended DC parameters of CAN bus line Table2 Hecommended DC parameters for CAN Bus Line Wire Cross Section mm Resistance Q km 0 25 AWG23 lt 90 0 5 AWG20 lt 50 0 8 AWG18 lt 33 1 3 AWG16 lt 20 The recommended AC parameters of CAN bus line are 1200 impedance and 5 ns m specific line delay l 7531 CAN Repeater User Manual ver 1 5 2012 11 22 12 3 8 Driving Capability and Baud Rate The relationship between ideal total bus length and baud are displayed below Table3 Baud Total Bus Length a
4. e Single CAN Network Remote 1 0 gt a gt m 1 L E y Ah VJ lt p PAC AN iem TIT 3 Y N CAN Bus S 4 CAN Bus 7 CAN Bus f CANopen DeviceNet J1939 SEEN I 7531 I 7531 Remote I O CAN Bus CANopen DeviceNet J1939 7 E ri l 7531 Figure10 Application Architecture l 7531 CAN Repeater User Manual ver 1 5 2012 11 22 15 9 Dimension and Mounting Top View 2 SCREW DIN RAIL M3 Unit mm Side View Figure11 Dimension l 7531 CAN Repeater User Manual ver 1 5 2012 11 22 16 Figure13 Mounting l 7531 CAN Repeater User Manual ver 1 5 2012 11 22 17
5. e Groud 16 GND CAN Ground or CAN GND Voltage level of CAN ground of CAN L and CAN H of CAN port 2 18 Port2 CAN H CAN High Signal Line of CAN port 2 20 CAN L CAN Low Signal Line of CAN port 2 l 7531 CAN Repeater User Manual ver 1 5 2012 11 22 7 Note 1 Note 2 In some cases the voltage level of CAN GND of different CAN device in the same CAN bus system are not equal At this time it could cause some problems to derogate system staibility of this CAN bus system There is one way to relieve this situation user can connect the CAN GND between those CAN devices to achieve equal voltage level of CAN GND Wiring of CAN GND is not necessary user can modify the configuration of wiring according to actual applications Electronic circuits are constantly vulnerable to Electro Static Discharge ESD which become worse in a continental climate area FG Frame Ground provides a path for bypassing ESD to earth ground allowing enhanced static protection ESD capability and ensures that the module is more reliable If user wants to use FG both the Pin 7 and Pin 14 should be connected to earth ground Within the 1 7531 Pin 7 and Pin 14 FG are not interconneced l 7531 CAN Repeater User Manual ver 1 5 2012 11 22 8 3 4 Wire Connection e CAN Port2 N N CAN_GND Earth Ground Ane a s LON ra CAN DEVICE CAN H Tl ee Qi i 7531 CAN b
6. h CAN port Futhermore there is photo isolation 2500 Vrms between two CAN ports CAN Port 1 Pal n ON EE ded DC TT T DC Physical CAN layer 120 Ohm CAN L T lt gt 3000 Vpc Mu Isolation 7 HD ti T T 2500 Vrms 3000 Voc Photo Isolation CAN Port 2 T Isolation 5 CAN H u Meise O E de DC Physical CAN layer 120 Ohm i CAN L Mecca sers e N Block Diagram of 1 7531 b d 10 Voc 30 Vic Figure2 Block Diagram of l 7531 l 7531 CAN Repeater User Manual ver 1 5 2012 11 22 5 3 2 Appearance at CPron 1 7531 CAN bus Repeater Status LED of Power amp Communication Support CAN 2 0A 2 0B Photo isolation 2500 Vrms Expand the number of CAN buses Mountable on DIN Rail 3000V Isolation CAN Port 1 Power Input l BEEN d Figures Apperance of l 7531 l 7531 CAN Repeater User Manual ver 1 5 2012 11 22 6 3 3 Pin Assignment Figure4 Pin Aassignment of l 7531 Tablel Pin Description of l 7531 No Part Name Description 1 CAN L CAN Low Signal Line of CAN port 1 CAN CAN H CAN High Signal Line of CAN port 1 5 Porti cup CAN Ground or CAN GND Voltage level of ground of CAN L and CAN H of CAN port 1 7 FG FG Frame Groud 9 Power R VS Voltage Source It could be 10V5c 30Vpc 10 Input B GND Power Ground 14 FG FG Fram
7. mote lO can bus i 7531 htm l 7531 CAN Repeater User Manual ver 1 5 2012 11 22 3 2 1 Features High speed Removable terminal block Mountable on DIN Rail Bus pins protected against transients in an industrial environment No disturbance of the bus lines with an un powered node Transmit data TxD dominant time out function prevents the output drivers from driving a permanent dominant state A thermal protection circuit is integrated to prevent the transceiver from damage if the junction temperature exceeds thermal shutdown level 2 2 Specifications Support CAN 2 0A CAN 2 0B Fully compatible with ISO 11898 2 Maximum communication baud 800Kbps Propagation Delay 200ns Driving capability Up to 100 nodes on each CAN port Photo coupler isolation between 2 CAN ports 2500 Vrms Power consumption 2W max CAN terminal resistors are integrated can be disabled by jumper 3KV galvanic isolated among of power supply and each CAN port Power Supply 10V5c 30Vpc Operating temperature 25 C 75 C Humidity 5 95 Dimensions 122 mm x 72 mm x 35 mm 2 3 Application Factory Automation Building Automation Home Automation Vehicle Automation Control system Monitor system l 7531 CAN Repeater User Manual ver 1 5 2012 11 22 4 3 Technical data 3 1 Block Diagram Figure 2 is a block diagram illustrating the functions of the l 7531 module Power supply are with 3000 Vpc galvanic isolated between eac
8. nd Number of l 7531 35 K 3 8 Note 4 When users add one l 7531 into a CAN network the ideal total bus length will reduce 40 meters because of the propagation delay of l 7531 For example if users use baud 500K and one l 7531 the ideal total bus length will be 100 40 1 60 meters After deciding the number of l 7531 and calculating the corresponding ideal bus length users can use the following table to know the maximum node number in each segment and the maximum segment length when using different type of wire Table4 Driving Capability The maximum segment length m under the case of specific node number in this segment 16 Nodes 32 Nodes 64 Nodes 100 Nodes 0 25 AWG23 lt 220 m lt 200 m 170 m 150 m 0 5 AWG20 390 m 360 m 310 m 270 m 0 8 AWG18 590 m 550 m 470 m 410 m 1 3 AWG16 980 m 900 m 780m 670m Wire Cross Section mma l 7531 CAN Repeater User Manual ver 1 5 2012 11 22 13 Note 5 The definition of segment and the relationship between segment length Lseg1 Lseg2 and ideal total bus length Liota are shown in the following figure N N Lsegi L1 Lseg2 L2a L2b 5 Lseg3 L3 Re Lsega L4 L total Lseg1 Lseg2 Lseg3 m sega Figure9 Definition of Lsegi and Ltotal l 7531 CAN Repeater User Manual ver 1 5 2012 11 22 14 4 Application Architectur
9. us Repeater Support CAN 2 04 2 0B Photo isolation 2500 Vrms Expand the number of CAN buses H Mountable on DIN Rail i l 3000V Isdation 7 pu c Power CAN Port 1 d CAN L mE i 1 Power GND CANH i if i 10Voc 30Voc 7 up o c m oq 222 7 N 7 i de 7 j Figure5 Wire Connection of l 7531 l 7531 CAN Repeater User Manual ver 1 5 2012 11 22 9 3 5 Status LED When user turning the l 7531 on the status LED of l 7531 will be display with red light Moreover when a message passes through l 7531 the status LED will be twinkle once with yellow light while the red light is still on Note 3 Twinkling rate correlates with baud rate of CAN bus User may see no twinkling when the twinkling period is too short because of the higher baud rate of CAN bus Besides the yellow LED could look like always on when bus loading is heavy 3 6 Terminator Resistor Setting According to the ISO 11898 2 specifications the bus line of CAN H and CAN L must be terminated by resistor for proper operation The equivalent resistance between CAN H and CAN L should be 600 There are some examples below Case1 Ry 1200 Case2 Rr 1800 CAN H DL H E RT 4 CAN L CAN L Case3 R 1800 Rr 1200 RT CAN H RT1 CAN L Figure6 Terminator Resistor l 7531 CAN Repeater User Manual ver 1 5 2012 11 22 10 On the other hand the 1 7531 module include two build in 120
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