I-2532 User Manual
Contents
1. I M Earth CANL Earth LC SR RERO ln et Power Port CAN Port ISO 11898 2 Figure 2 6 Wire Connection of l 2532 The l 2532 has a metallic board attached to the back of the plastic basket This metallic board and the F G pin of power connector are interconnected inside the l 2532 When users mount the l 2532 onto a metal DIN rail users can connect the DIN rail to Earth Ground to replace connecting the F G pin of power connector Metallic Board Ts Interconnecting Figure 2 7 Metallic Board at Back of l 2532 l 2532 CAN to Fiber Converter User Manual ver 1 1 2008 10 03 10 3 Network Deployment 3 1 Definition The definition of segment in a CAN bus system are shown as following figure The segment 2 is fiber cable Generally the segment 1 and segment 3 are copper cable The copper cable is a balanced differential 2 wire interface It may be a Shielded Twisted Pair STP Un shielded Twisted Pair UTP or Ribbon cable LI ONB U Segment 1 E Segment 2 f Segment 3 ISO 11898 2 ISO 11898 2 2532 2532 Figure 3 1 Segment in CAN bus system 3 2 Driving Capability Before introducing the driving capability of l 2532 some characteristics of copper cable must be assumed The AC parameters are 1200 impedance and 5 ns m line delay and the DC parameter follows the table shown below Table 3 1 Recommended DC parameters for CAN Bus Line Wire Cross Section mm2. The I 2532 CAN to Fiber Converter 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 2532 CAN to Fiber Converter User Manual ver 1 1 2008 10 03 1 Tables of Content Tables of Content iscicsssssssiccsscccisaiiastasadacwtinadsnsvdensnewtdcuianntanntaassdcaddaetaaniieriacniand 2 DEN Slip Paene 3 1 1 FealileSnosoninnio dvi dno n non vpn non nnn D n RR 4 1 2 SpeclfiCatlOnS inier ovn dus ex nx c DE a a RE E DK CDD ER Ex RR e c ni 4 1 3 Applications s nasa rna ac aka daa eda ac dada da iactu uda 4 2 Technical dalauni Soda oid odd castri a dietas eo cu Uc a a Vt eE laure 5 2 1 Block DIGgFAmissnnis iii c Dunk DEVE cenduawcucuduawsueuduawcusudaawsuendeawcuans 5 2 2 rie fem 6 2 3 Pin Assignm
3. Resistance O km l 2532 CAN to Fiber Converter User Manual ver 1 1 2008 10 03 11 Under the conditions described above users can refer to the following table to know the maximum node numbers in each segment following ISO 11898 2 and the maximum segment length when using different type of wire Table 3 2 Driving Capability The maximum segment length m under the case of specific node number in this segment 0 25 AWG23 lt 390 Wire Cross Section mm2 sz Nodes 6t Nodes 100 odes won a CET ETE 70 5 70 8 3 3 Fiber Selection amp Fiber Length The specification of fiber used to connect l 2532 is shown as following table Table 3 3 Specification of Fiber Tvpe Diameter um Operating we Core Cladding Wavelength nm Multi Mode 62 5 125 Higher attenuation of fiber will reduce the transmission distance Users can use following table to know the relationship between those two Table 3 4 Attenuation amp Fiber Length Attenuation dB km Fiber Length m 8 l 2532 CAN to Fiber Converter User Manual ver 1 1 2008 10 03 12 3 4 Baud and Bus Length The limitation of baud on a CAN bus system is restricted by propagation delay On the other hand long bus length leads to long propagation delay The relationship between baud and bus length is displayed below Table 3 5 Baud Bus Length 50K lt 1000 20K lt 2500 The definition of segments the relationship betwe
4. ehl iiis cn nun rini UE LEER EEEUEERENEEEFEEENEEEFEEEEER 7 24 EED IBOIG2AI OE uoo rete reta ces con ra E uv 8 2 5 Terminal Resistance Setting ceeeeeseessss 8 2 5 Wire CODnec OTI coiere ceci iren eH rv o REO ER rk EXCEDAT dri 10 3 Network Deployment eres rena arn es ndr dann dann Enn dann Raas 11 Sal GST ON auci da nisiut dau n eine ein date TT 11 3 2 Driving Capability iiia s ra ped ec dala rds Ro sa E YE Dada RR RARE a iK a RR 11 3 3 Fiber Selection amp Fiber Length 12 3 4 Baud and Bus Length eese 13 4 DIMENSION iier a a RR da i n ac n n 14 1 2532 CAN to Fiber Converter User Manual ver 1 1 2008 10 03 2 1 Introduction Fiber optic transmission medium is a good material to protect data transmission from EMI RFI interference and has been used in harsh environment extensively On the other hand CAN bus is famous in industrial application More and more users build CAN networks to communicate their controllers sensors and actuators In order to solve the problem between different transmission medium l 2532 is specially designed for converting the electrical CAN bus signal to fiber optic cables The fiber length between two 1 2532s can be up to 1 4km 4593ft it is mainly decided by the cable attenuation of fiber and the CAN bus baud l 2532 is the economic solution for applic
5. ations which require protecting the data transmission from electrical exposure surges lightning or chemical corrosion Generally l 2532 can be used in CANopen DeviceNet and all the other CAN network which follows the ISO 11898 2 standard CAN Device CAN Device ze 3 1 l 2532 ISO 11898 2 E ISO 11898 2 CE Upio 1 4 Km BT Y CAN Device CAN Device 62 5 125 um multimode Fiber Cable Attenuation of Fiber 2 8 dB Km Figure 1 1 Application of l 2532 If users want to know more detail information about the l 2532 please visit our website as follow http www icpdas com products Remote lO can bus i 2532 htm l 2532 CAN to Fiber Converter User Manual ver 1 1 2008 10 03 3 1 1 Features Build in switch for 120Q terminal resistance Up to 100 CAN nodes on CAN Port Transmission distance up to 1km on CAN Port Transmission distance up to 1 4km on Fiber Port Removable terminal block Mountable on DIN Rail 1 2 Specifications Fiber Port connector type ST Fiber Port operating wavelength 850nm Fiber type 62 5 125yum multi mode Compatible with CAN specification 2 0A and 2 0B Fully compatible with ISO 11898 2 Support baud up to 500Kbps auto baud detection Propagation delay lt 125ns Power consumption 0 5W Power supply 10Vpc 30Vpc Operating temperature 25 C 75 Humidity 596 95 non condensing Dimensions 32 3mm x 99 0mm x 77 5mm ESD gt EFT gt Surge Protection ESD 4KV Contact Dis
6. charge EFT 1KV Surge 2KV 1 3 Applications Factory Automation Building Automation Home Automation Vehicle Automation Control system Monitor system l 2532 CAN to Fiber Converter User Manual ver 1 1 2008 10 03 2 Technical data 2 1 Block Diagram The following figure is the block diagram illustrating the functions of the l 2532 module ou Fiber Port ISO 11898 2 x u Pd BE d 5N CANH TD jQ 4 uHI nce CANL 120Q Physical CAN layer RD gt D 2S ht p u Photo Isolation Block Diagram of l 2532 A t 10Voc 30Vpc Power Port 2 gt Figure 2 1 Block Diagram of l 2532 l 2532 CAN to Fiber Converter User Manual ver 1 1 2008 10 03 5 2 2 Appearance Front View Bottom View LED Indicators Nc rien Connector Type ST Operating Wavelength 850nm Fiber Type Multi Mode 62 5 125um canoe ISO 11898 2 standard ae 10 30Vpc between Terminal Resistance Switch GND and VS Figure 2 2 Appearance of l 2532 l 2532 CAN to Fiber Converter User Manual ver 1 1 2008 10 03 6 2 3 Pin Assignment The pin assignment of CAN port fiber port and power connector of the l 2532 are shown in the following tables Table 2 1 Pin Assignment Port Name Description CAN_L CAN_Low signal line of CAN Port CAN CAN_H CAN High signal line of CAN Port CAN GND CAN Ground ground volta
7. en segment length Lsec1 Lsec2 and bus length Laus in the same CAN bus system are shown in the following figure nin Leus Lsegi T Lseg2 Lseg3 ae L L co segin ER a bseg3 ISO 11898 2 ISO 11898 2 I 2532 l 2532 Figure 3 2 Segment Length and Bus Length When users add one pair of l 2532 into a CAN bus system the ideal bus length will reduce 50 meters because the propagation delay of one l 2532 is equal to the propagation delay caused by 25 meters bus length For example if users use baud 50Kbps and add two l 2532s into a CAN bus system the ideal bus length should less than 950 meters 1000 25 2 950 l 2532 CAN to Fiber Converter User Manual ver 1 1 2008 10 03 13 4 Dimension 88 0 92 0 Unit mm rmn Back View Top View Bottom View Figure 4 1 Dimension of l 2532 l 2532 CAN to Fiber Converter User Manual ver 1 1 2008 10 03 14
8. ge level of CAN Port Fiber TXD Transmit optic data i RXD Receive optic data VS Voltage Source Input 10Vpc 30V Voc Power Power Ground Frame Ground Sometimes the CAN GND voltage level of different CAN devices on a CAN bus system are not equal In this case it could cause some problems and derogate the system stability There is one way to relieve this situation users can connect the CAN GND of different CAN devices each other to balance the voltage level of CAN GND Electronic circuits are always influenced by different levels of Electro Static Discharge ESD which become worse in a continental climate area F G provides a path for conducting the ESD to the earth ground Therefore connecting the F G correctly can enhance the capability of the ESD protection and improve the module s reliability Wiring of CAN GND and F G is not necessary users can modify the configuration of wiring according to real applications l 2532 CAN to Fiber Converter User Manual ver 1 1 2008 10 03 7 2 4 LED Indicator When the l 2532 is active the POWER LED will display with red light Transmitting receiving one message to from fiber cable will flash the TD RD LED once The TD RD LED may always be turned on if there are a lot of messages transmitted on fiber cable Table 2 2 LED Indicator POWER LED TD LED RD LED Red Light Green Light Green Light on mocule flashing ane ia flashing SSMUS active t
9. ransmitting receiving off module off no message off no message inactive transmitting receiving 2 5 Terminal Resistance Setting The 1 2532 includes one build in 120Q terminal resistance users can decide if the terminal resistance is enabled or not The switch for terminal resistance is on below of power connector gt termination j resistor switch Figure 2 8 Location of Terminal Resistance Switch The following switch statuses present the condition if the terminal resistance is active default or inactive 1 Active Inactive Enable Disable Figure 2 4 Adjustment of Terminal Resistance l 2532 CAN to Fiber Converter User Manual ver 1 1 2008 10 03 8 In the CAN bus specifications the bus line of CAN_H and CAN_L must be terminated by a terminal resistance Rr for proper operation The equivalent resistance between CAN H and CAN L should be 60Q There are some examples below Case1 Rr 1200 Case2 Rr 1800 CAN_H CAN_H Rt Rt Rr RT CAN_L CAN_L Case3 Rr 180 Rre 1200 H Fiber l CAN L l 2532 l 2532 N Rri Figure 2 5 Terminal Resistance l 2532 CAN to Fiber Converter User Manual ver 1 1 2008 10 03 9 2 6 Wire Connection The wire connection of l 2532 is displayed below Fiber Port al N Tx Tx Rx Rx Nv 9 Pd 7 10Voc 30Voc Power GND 10Vbc 430Voc Power GND
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