Manual: CAN Repeater CRep N - Ems-wuensche.com
Manual: CAN Repeater CRep N - Ems-wuensche.com
Manual: CAN Repeater CRep N - Ems-wuensche.com
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<strong>CAN</strong>-<strong>Repeater</strong><strong>CRep</strong> N-.../S24/RMDUser <strong>Manual</strong>EMSTHOMAS WÜNSCHESonnenhang 3D-85304 IlmmünsterTel +49-8441/490260Fax +49-8441/81860
<strong>CRep</strong> N-.../S24/RMDUser <strong>Manual</strong>Documentation for <strong>CAN</strong>-<strong>Repeater</strong> <strong>CRep</strong> N-.../S24/RMD.Document version: V1.3Documentation date: May 23th, 2005No part of this document or the software described hereinmay be reproduced in any form without prior writtenagreement from EMS Dr. Thomas Wünsche.For technical assistance please contact:EMS Dr. Thomas WünscheSonnenhang 3D-85304 IlmmünsterTel. +49-8441- 490260Fax +49-8441- 81860Email: support@ems-<strong>wuensche</strong>.<strong>com</strong>Our products are continuously improved. Due to this factspecifications may be changed at any time and withoutannouncement.WARNING:<strong>CRep</strong> N-.../S24/RMD hardware and softwaremay not be used in applications where damageto life, health or private property mayresult from failures in or caused by these<strong>com</strong>ponents.iiEMS Dr. Thomas Wünsche
User <strong>Manual</strong><strong>CRep</strong> N-.../S24/RMD1 Overview1.1 Attributes• Protocol transparent <strong>CAN</strong> repeater• High throughput due to low latency• ISO 11898 <strong>com</strong>patible bus interface• Shutdown of erroneous bus segments• Rail mountable1.2 General DescriptionThe <strong>com</strong>pact <strong>CAN</strong> repeater <strong>CRep</strong> N transmitsand amplifies signals transparent to the <strong>CAN</strong>protocol. Each of the two <strong>CAN</strong> connectionshas the physical behaviour of a single busnode. <strong>CRep</strong> N permits a flexible design of thenetwork topology. Star and tree structures canbe implemented as well as long stub lines.Through the possibility to use the networkstructure that fits the application best a reductionof installation costs can be reached.The maximum data rate in <strong>CAN</strong> networks, dependingon signal propagation delays, can beincreased if <strong>CRep</strong> N is used to improve thenetwork structure. An increase of the maximumnode count in a <strong>CAN</strong> network can bereached by splitting the network in subnetsthat are connected by <strong>CRep</strong> N. Each subnetcan include the number of <strong>CAN</strong> nodes permittedby the drivers output current. Where <strong>CAN</strong>signals have to be transmitted over long distances,<strong>CRep</strong> N can be used for signal conditioning.The integrated shut down capability incase of errors reduces the impact on intactbus segments by defective segments for themost <strong>com</strong>monly occuring errors.EMS Dr. Thomas Wünsche 1
<strong>CRep</strong> N-.../S24/RMDUser <strong>Manual</strong>1.3 Ordering Information12-01-0xx-20<strong>CRep</strong> N-.../S24/RMD<strong>CAN</strong>-<strong>Repeater</strong> for rail mounting,extended temperaturerange (... Inhibit time)2 EMS Dr. Thomas Wünsche
User <strong>Manual</strong><strong>CRep</strong> N-.../S24/RMD2 Electrical Characteristics2.1 Absolute Limiting ValuesAny (also temporary) stress in excess of the limitingvalues may cause permanent damageon <strong>CRep</strong> N-../S24/RMD and connected devices.Parameter Min Max UnitStorage temperature -40 +90 °COperating temperature -20 +80 °CPower supply voltage -100 +35 VVoltage on signal lines -30 +30 VMaximum powerdissipation (at 60°C)2.2 Nominal values– 1000 mWAll values, unless otherwise specified, refer toa supply voltage of 24V and an environmentaltemperature of 20°C.Parameter Min Typ Max UnitCurrentconsumption¹(no load)Currentconsumption¹(250kBit/s,100% load)Power supplyvoltagePropagationdelay¹ with 24V supply voltage– 25 – mA– 35 – mA11 24 30 V– 100 175 nsEMS Dr. Thomas Wünsche 3
<strong>CRep</strong> N-.../S24/RMDUser <strong>Manual</strong>3 Operating Instructions3.1 Layout and Pin Assignment<strong>CRep</strong>N devices include 2 <strong>CAN</strong> segments, wiredby a terminal block with 8 clamps. Besidesthe <strong>CAN</strong> signals the terminal block also carriesthe power supply for <strong>CRep</strong>N.46mm<strong>CAN</strong> <strong>Repeater</strong><strong>CRep</strong> N-5/S24/RMDVersion 1.0EMS Dr. Thomas Wünsche76mm<strong>CAN</strong> 1-H<strong>CAN</strong> 1-LGNDGND<strong>CAN</strong> 2-H<strong>CAN</strong> 2-LGND+24V4 EMS Dr. Thomas Wünsche
User <strong>Manual</strong><strong>CRep</strong> N-.../S24/RMDThe following table shows the terminal assignment:Pin Name Function1 <strong>CAN</strong>1-H <strong>CAN</strong>1-High bus line2 <strong>CAN</strong>1-L <strong>CAN</strong>1-Low bus line3 GND Ground4 GND Ground5 <strong>CAN</strong>2-H <strong>CAN</strong>2-High bus line6 <strong>CAN</strong>2-L <strong>CAN</strong>2-Low bus line7 GND Ground8 +24V 24V power supplyEMS Dr. Thomas Wünsche 5
<strong>CRep</strong> N-.../S24/RMDUser <strong>Manual</strong>3.2 Block DiagramTransceiver <strong>CAN</strong>_HB<strong>CAN</strong>_LLogic5V24V<strong>CAN</strong>_H<strong>CAN</strong>_L+24VGNDTransceiverA6 EMS Dr. Thomas Wünsche
User <strong>Manual</strong><strong>CRep</strong> N-.../S24/RMD4 MeasurementsAll values in [mm].EMS Dr. Thomas Wünsche 7
<strong>CRep</strong> N-.../S24/RMDUser <strong>Manual</strong>5 Appendix A: Topology examples<strong>CAN</strong> busses should always be terminated on both ends, typicallyusing a 120Ohm termination resistor between <strong>CAN</strong>-Highand <strong>CAN</strong>-Low signal lines.LegendLine topology with repeatersTree topology with repeaters8 EMS Dr. Thomas Wünsche
User <strong>Manual</strong><strong>CRep</strong> N-.../S24/RMDStar topology with repeatersEMS Dr. Thomas Wünsche 9
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