The I-7532 CAN Bridge
Contents
1. Communication LED CH1RX CH2RX Status Table 2 2 Communication LED Status Rx LED Green Light Flashing Transmission OFF Bus Idle If there is a message passing through l 7532 from channel 1 to channel 2 the CH1 Rx LED will flash once with green light and vice versa Error LED CH1 ERR CH2 ERR Status Table 2 3 Error LED Status ERR LED Red Light Flashing 100ms Flashing 1sec Buffer overflow ON Bus Off OFF No Error 1 Transmission Fail If CAN transmission fails on channel X the CH X ERR LED will flash continuously and the flashing interval is about 100 ms 2 Buffer overflow If Tx buffer on channel X has been overflow the CH X ERR LED would flash continuously and the flashing interval is about 1 second No matter the status is already fixed or not after user click the RST button the Error LED will be off 3 Bus Off If Bus Off condition happened on channel X of l 7532 the CH X ERR LED will be always ON until corrected Transmission Fail l 7532 CAN Bridge User Manual ver 1 0 2008 08 25 9 2 4 Reset amp Error Clear Button Table 2 4 Reset amp Error Clear Button Reset amp Error Clear Button Click once Clear Error LED Press 3 sec Module Reset 1 Error Clear Users can click this button to clear the ERR LED status 2 Module Reset If users want to reset l 7532 just press RST amp Error Clean button until 3 sec then all LEDs on2. Rotaryswitch value amp Baud RoW 1 4455 6 z Baus SK 10K 20K 40K SOK SOK 100x 125x CH1 Baid CH2 Baid Earth Ground Figure 2 4 Wire Connection of l 7532 l 7532 CAN Bridge User Manual ver 1 0 2008 08 25 13 2 8 Terminator Resistor Setting l 7532 includes two build in 120Q terminal resistors users can decide to enable these two terminal resistors or not The JP4 of l 7532 is used to adjust terminal resistor on CAN Channel 1 and the JP3 of l 7532 is used to adjust terminal resistor on CAN Channel 2 Before adjusting JP3 or JP4 of l 7532 users need to open the cover of l 7532 first The location of JP3 and JP4 is shown as follows Figure 2 5 JP3 and JP4 positions The following connection statuses present the condition if the terminal resistor is enabled default or disabled Kee D i Disable Enable Deactivate Activate Figure 2 6 Adjustment of Terminator Resistor l 7532 CAN Bridge User Manual ver 1 0 2008 08 25 14 3 Network deployment 3 1 Definition Following figure is the relation among segments in CAN bus and CAN network oee CAN Network Dees CAN Bus 1 __ CAN Buss 2 Sen Segment 1a 8 Segment ib Segment 1c 2 Segment 2a 8 Segment 2b ae Ke RE Kg l 7531 l 7531 l 7532 l 7531 Repeater Repeater Bridge Repeater Figure 3 1 Segment CAN Bus and CAN network 3 2 Cable Selection The CAN bus following ISO 11898 2 is a balanced
3. ccccccssssssssesseeeeeeeseeeeeeeeeeeeeeeees 10 2 5 Baudrate Selection Switch use 10 2 6 PiN Aeeignment sveurerveutveerseENeKENEKENEEENEKENEKENEKENEEENEKENERENEKENEEENEKENEeg 11 2 7 Wire Connection cccccceeeeeeeeeesseeeeeeeeeeeeeeeeeseeeeeeeseeeeeeeeeeneeeeees 13 2 8 Terminator Resistor Setting sccccccesessssseeeeeeeeeeeeseeeeeeeeeees 14 3 Network deployment ecccceeeseeeeeeeeeeeeeeeeeeseeeeeeeeeeeeeeeeeesenseeeennees 15 3 1 Definito aana daan raaa aadd aiaiai aAa i aaa Aaa adia desiccated 15 3 2 Cable Selection cccccccccssssnessssseeseeeeecsnnnssseeseeseeeesennnessesseees 15 3 3 Driving Capability a icssscctsccscnseissssaescccuvedseriaesnssctncaeanvnanaesawe 16 3 4 Baud and Bus Lepngtbtsges eugesv eusges eusgeseEeusgeeGeusgeeeEeusgeeGeusgesgeeh 16 3 5 Terminator Res Stor wisecsiccecessieicvccainsssecasassvacedntevecevarsverevecnvesssecsvns 17 l 7532 CAN Bridge User Manual ver 1 0 2008 08 25 2 1 Introduction l 7532 is a local CAN bridge used to establish a connection between two CAN bus system in a CAN network l 7532 stands by itself connecting adjacent wiring segments together as in the case of a CAN repeater l 7531 Not just like a CAN repeater l 7532 has two more powerful features Extend Network Distance and Connect two networks with different baud rate Figure 1 1 l 7532 The l 7532 is an optically isolated CAN bridge which provides 2500Vprms optical isolati
4. differential 2 wire interface running over either a Shielded Twisted Pair STP Un shielded Twisted Pair UTP or Ribbon cable The table below shows the recommended DC parameters of CAN bus line Table 3 1 Recommended 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 7532 CAN Bridge User Manual ver 1 0 2008 08 25 15 3 3 Driving Capability 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 in the CAN network Table 3 2 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 lt 170 m lt 150 m 0 5 AWG20 lt 390 m lt 360 m lt 310 m lt 270 m 0 8 AWG18 lt 590 m lt 550 m lt 470 m lt 410 m 1 3 AWG16 lt 980 m lt 900 m lt 780 m lt 670 m Wire Cross Section mm 3 4 Baud and Bus Length The relationship between ideal bus length and baud in the CAN bus system is displayed below Table 3 3 Baud Bus Length Baud bit sec Ideal Bus Length m 1M lt 40 800K lt 50 500K l
5. l 7532 can enhance the bus load capacity and users can know how to increase driving capability by table 3 2 1 1 Features Microprocessor inside with 72MHz 82C250 CAN transceiver 2500Vams photo couple isolation on the CAN side 3000Vpc galvanic isolation among the power supply and 2 CAN channel 120Q CAN terminal resistors are integrated can be disabled by jumper Watchdog inside Driving capability Up to 100 nodes on each CAN channel Transmission distance up to 1km on each CAN channel Removable terminal block Mountable on DIN Rail 768 frames buffer for each CAN channel The baud of each channel can be different for highly flexibility l 7532 CAN Bridge User Manual ver 1 0 2008 08 25 5 1 2 Specifications Support CAN 2 0A CAN 2 0B Fully compatible with ISO 11898 2 Communication baud 5K 10K 20K 50K 80K 100K 125K 200K 250K 400K 500K 600K 800K and 1Mbps Power consumption 2W max Power Supply 10Vpc 30Vpc Operating temperature 25 75 Humidity 5 95 Dimensions 122 mm x 72 mm x 35 mm 1 3 Application 1 4 Factory Automation Building Automation Home Automation Vehicle Automation Control system Monitor system Information For more information about the l 7532 please visit our website http www icpdas com products Remote O can_bus i 7532 htm l 7532 CAN Bridge User Manual ver 1 0 2008 08 25 6 2 Technical data 2 1 Block Dia
6. l 7532 will flash once about 0 8 sec After reset is finished the PWR Led will be on and other LEDs will be off 2 5 Baud Selection Switch Users can use the Baud Rotary Switch to change the CAN1 and CAN2 baud of l 7532 and it supports 15 kinds of baud on below table After changing the rotary switch value users need to reset l 7532 to take the setting effect by pressing RST button until 3 sec Table 2 5 Rotary Switch Value amp Baud Switch Value 0 1 2 3 4 5 6 7 Baud bps NA 5k 10k 20k 40k 50k 80k 100k Switch Value 8 9 A B C D E F Baud bps 125k 200k 250k 400k 500k 600k 800k 1M l 7532 CAN Bridge User Manual ver 1 0 2008 08 25 10 2 6 Pin Assignment N oO LHO NYO Q gt Zz CO T N Figure 2 3 CAN amp Power Connector of l 7532 Table 2 6 Pin Description of CAN Connector Part Name Description CAN_GND CAN_Ground ground voltage level of CAN channel 1 CAN CAN_L CAN_Low signal line of CAN channel 1 CH1 FG1 Frame Ground of CAN channel 1 CAN_H CAN_High signal line of CAN channel 1 CAN_GND CAN_Ground ground voltage level of CAN channel 2 CAN CAN_L CAN_Low signal line of CAN channel 2 CH2 FG2 Frame Ground of CAN channel 2 CAN_H CAN_High signal line of CAN channel 2 Table 2 7 Pin Description of Power Connector Part Name Description R VS Voltage Source It could be 10
7. The I 7532 CAN Bridge 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 7532 CAN Bridge User Manual ver 1 0 2008 08 25 1 Tables of Content Tables Of Content EE 2 At JEE HERE 3 SW 5 1 2 SSPCCHICAUONS waitin inn 6 1 3 Application cciscsisissaiassiscassiccasnsecnsasasacacecasasnvasasannacasesnvariiacnsncasedacanns 6 1 4 Information EE 6 2 Atechnical data sinaran aara aa apaapa aaa aaa ees 7 2 1 Block Diagrat zesegetesge EuEE NEEN EEhEEEEREE e EEhEEEEN EENEG 7 2 2 Appearance sicicscisicccicissccwieinisciecnecewincniecwincecwawincwnwawineenwewencwnwewewtwieds 8 2 3 LED Status sisi iicsesinteecincntuiesecusvecewcnteee bye etvevveewtveeteontvevtventveutnentuesteextaes 9 2 4 Reset amp Error Clear Button
8. Vpc 30Vpc Power B GND Power Ground FG3 Frame Ground of Power l 7532 CAN Bridge User Manual ver 1 0 2008 08 25 11 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 stability 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 the FG1 and FG2 and FG3 should be connecting to earth ground Within the l 7532 FG1 and FG2 and FG3 are not interconnected l 7532 CAN Bridge User Manual ver 1 0 2008 08 25 12 2 7 Wire Connection oa p P S 7 CAN_GND M S CAN_H Ki RK Earth Ground ERC l Earth Ground CAN_L em em em em eg Se CAN GND d t CAN CH 1 CAN CH 2 CHIERR i 7532 cmeR CHIRO Co E CAN Bus Bridge Support CAN 2 0A 2 0B Selectable 120 terminator resistor
9. gram The following block diagram illustrates the functions of l 7532 module Power supply is with 3000Vpc galvanic isolated between each CAN port Furthermore there is photo isolation 2500Vprms between two CAN channels CAN Channel 1 a 2 OON CAN Hi erce DC DC Physical CAN layer 1200 CANL Rm a ber NG e 2000 2500Vams a Galvanic Isolation Photo Isolation 2500Vams CAN 3000Vpc Photo Isolation Channel 2 Galvanic isolation go CANH ee DC DC ___ Physical CAN layer 1200 CANL 4 oo 7 d Block Diagram of l 7532 KEN i 1 DN pe We 30Vpc Figure 2 1 Block Diagram of l 7532 l 7532 CAN Bridge User Manual ver 1 0 2008 08 25 7 2 2 Appearance CAN Channel 1 N S CAN Channel 2 we Power amp Communication Error LED LED CH1 ERRO CH2 ERRO CAN Bus Bridge Support CAN 2 0A 2 0B Selectable 1200 terminal resistor Rotary switch value amp Baud RSW 1 2 3 4 5 6 8 Baud 5K 110K 20K 40K 50K I 80K 1100KI 125K RSW 9 CH1 Baud CH2 Baud RST amp Err Clear Nn Power Input Baud Switch Reset amp Error Clear Button Figure 2 2 Appearance of l 7532 l 7532 CAN Bridge User Manual ver 1 0 2008 08 25 8 2 3 LED Status Power LED PWR LED Status Table 2 1 Power LED Status PWR LED Red Light ON Power On OFF Power off When l 7532 is active the PWR LED will turn on with red light
10. on allowing users to separate and protect critical segments of the CAN network And it is 3000Vpc galvanic isolation isolates both CAN channels from each other as well as from the power supply The CAN connection of l 7532 is by terminal blocks A power supply of 10 30Vpc is required l 7532 is housed in a rugged DIN Rail mountable box making it easy to install in an industrial cabinet l 7532 CAN Bridge User Manual ver 1 0 2008 08 25 3 Extend The Communication Network Distance After Use the I 7532 The Total Distance is 120m l 7532 ue n Baudrate 1Mbps d 40m Baudrate 1Mbps 40m A 40m Figure 1 2 Application of l 7532 Extend Distance The transmission distance limitation of the CAN bus system on each side of l 7532 are independent which means the total network distance can be extended Connected Two Different Baudrate Network Connected Two Different Baudtrate Baudrate 1Mbps Baudrate 800Kbps Figure 1 3 Application of l 7532 Different Baud Connected The baud rate of two channels on l 7532 can be different for highly flexibility On the other hand when the CAN bus system on one side of l 7532 happens some error e g bit error the system on other side can still work on correctly l 7532 CAN Bridge User Manual ver 1 0 2008 08 25 4 Raise the number of node in the bus We d tt Pl elec 8 W are 200 mere Figure 1 4 Application of l 7532 Raise node
11. t 100 250K lt 250 125K lt 500 50K lt 1000 20K lt 2500 10K lt 5000 When users want to calculate the bus length the device used to connect CAN segment must be considered too User can check the specification of the device and find the equivalent bus length of the device For example the equivalent bus length of CAN repeater l 7531 is 40m l 7532 CAN Bridge User Manual ver 1 0 2008 08 25 16 3 5 Terminator Resistor According to the ISO 11898 2 specifications the bus line of CAN_H and CAN_L must be terminated by a terminal resistor for proper operation The equivalent resistance between CAN H and CAN_L should be 600 There are some examples below Casel Rr 120 Case2 Rr 180 CAN_H CAN_H Rt 2 Rt Rt 2 Rt Ls Kean I Case3 Rr 1809 R 1200 Rr CAN H Hrs Hrs cant ont __ l l CAN Repeater I or CAN Bridge Hm Figure 3 2 Terminator Resistor l 7532 CAN Bridge User Manual ver 1 0 2008 08 25 17
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