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Hardware Installation

3. Hardware Installation

To put the CAN-USB/2 into operation, please follow the installation notes.

Step

Procedure

see

page

Read the safety instructions at the beginning of this document
carefully, before you start with the hardware installation!

1.

Connect the CAN-USB/2-module with the USB bus of the PC

-

2.

Please note that the CAN bus has to be terminated at both ends!

esd

offers special T-connectors and termination connectors. Additionally the
CAN_GND signal has to be connected to earth at

exactly one

point in

the CAN network. Therefore the CAN termination connectors offered by
esd have got a grounding contact.
A CAN participant with a CAN interface which is not electrically isolated
corresponds to the grounding of the CAN-GND.

-

3.

Switch on the power supply voltage of the CAN-USB/2.

-

Note:

The software installation is described in the manual ‘CAN-API, Installation Guide’.

Page 10 of 25

Hardware Manual • Doc. No.: C.2066.21 / Rev. 1.4

CAN-USB/2

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Содержание C.2066.21

Страница 1: ...are Manual to Product C 2066 xx CAN USB 2 Hardware Manual Doc No C 2066 21 Rev 1 4 Page 1 of 25 esd electronic system design gmbh Vahrenwalder Str 207 30165 Hannover Germany http www esd eu Phone 49 0 511 3 72 98 0 Fax 49 0 511 3 72 98 68 ...

Страница 2: ...on to third parties and reproduction of this document in any form whole or in part are subject to esd s written approval 2013 esd electronic system design gmbh Hannover esd electronic system design gmbh Vahrenwalder Str 207 30165 Hannover Germany Phone 49 511 372 98 0 Fax 49 511 372 98 68 E Mail info esd eu Internet www esd eu Trademark Notices CANopen and CiA are registered community trademarks o...

Страница 3: ...elow affect changes in the hardware as well as changes in the description of the facts only Revision Chapter Changes versus previous version Date 1 4 6 Updated chapter Correctly Wiring Electrically Isolated CAN Networks 2013 03 06 8 New Declaration of Conformity 9 Updated chapter Order Information Technical details are subject to change without further notice CAN USB 2 Hardware Manual Doc No C 206...

Страница 4: ...ed exclusively towards personal qualified in control and automation engineering The installation and commissioning of the product may only be carried out by qualified personal which is authorized to put devices systems and electric circuits into operation according to the applicable national standards of safety engineering Conformity The CAN USB 2 is an industrial product and meets the demands of ...

Страница 5: ...eneral Rules 15 6 1 2 Cabling 16 6 1 3 Termination 16 6 2 Heavy Industrial Environment Double Twisted Pair Cable 17 6 2 1 General Rules 17 6 2 2 Device Cabling 18 6 2 3 Termination 18 6 3 Electrical Grounding 19 6 4 Bus Length 19 6 5 Examples for CAN Cables 20 6 5 1 Cable for Light Industrial Environment Applications Two Wire 20 6 5 2 Cable for Heavy Industrial Environment Applications Four Wire 2...

Страница 6: ... of CAN interfaces the bit rate can be set by means of software CAN interface and other voltage potentials are electrically isolated by means of a digital isolator and DC DC converters The supply voltage is fed via the USB bus The module is equipped with four green LEDs in the front panel which indicate the current module status CAN USB 2 Hardware Manual Doc No C 2066 21 Rev 1 4 Page 7 of 25 5 V 5...

Страница 7: ...Case View with LED and Connector Description 2 Case View with LED and Connector Description Figure 2 PCB top view Figure 3 USB Interface Page 8 of 25 Hardware Manual Doc No C 2066 21 Rev 1 4 CAN USB 2 ...

Страница 8: ...ata is received or send on the CAN bus OK LED300A on CAN interface is initialized bit rates are set off bit rate not set fast flashing appr 10 Hz CAN interface is initialized and in mode Listen Only the bit rate is already set slow flashing appr 1 Hz CAN interface is initialized and in mode Automatic Baudrate Detection from firmware version 1 0 0 4 and CAN driver version 2 5 2 on Table 1 Descripti...

Страница 9: ...t both ends esd offers special T connectors and termination connectors Additionally the CAN_GND signal has to be connected to earth at exactly one point in the CAN network Therefore the CAN termination connectors offered by esd have got a grounding contact A CAN participant with a CAN interface which is not electrically isolated corresponds to the grounding of the CAN GND 3 Switch on the power sup...

Страница 10: ...ht 70 g Table 2 General data of the module Note Please note that the current consumption of the module of 250 mA has to be supplied high powered bus powered device The maximum current consumption of 250 mA has to be guaranteed also if a hub is used Therefore it is highly recommended to use a self powered hub 4 2 USB Interface and Microcontroller USB interface USB 2 0 bit rate up to 480 Mbit s Micr...

Страница 11: ...e 4 4 Serial Interface Number 4 asynchronous serial interfaces Controller integrated in CPU or external DUART Bit rate Value range 9600 Baud 115200 Baud Default setting 9600 Baud 8 Bit No Parity 1 Stop Bit Physical Interface Serial 1 RS232 with RxD TxD RTS CTS DSR DTR Serial 2 RS232 with RxD TxD Serial 3 RS485 Serial 4 Software Standard operating system driver Connector 9 pin DSUB Table 5 Data of ...

Страница 12: ...l 1 reserved CAN_GND 6 2 CAN_L CAN_H 7 3 CAN_GND reserved 8 4 reserved reserved 9 5 Shield Signal Description CANx_L CANx_H CAN signals of the CAN interface x x 1 4 CANx_GND reference potential of the local CAN physical layer of CAN interface x x 1 4 reserved for future applications do not connect CAN USB 2 Hardware Manual Doc No C 2066 21 Rev 1 4 Page 13 of 25 ...

Страница 13: ...USB nets with USB interface version numbers 1 1 interface Using versions earlier than 2 0 reduces the data transfer rate Pin Position Pin Assignment Pin Signal 1 VBUS 2 D 3 D 4 GND Shell Shield USB socket series B Page 14 of 25 Hardware Manual Doc No C 2066 21 Rev 1 4 CAN USB 2 ...

Страница 14: ...a signals CAN_H CAN_L and the cable shield to the reference potential CAN_GND 3 The reference potential CAN_GND has to be connected to the functional earth FE at exactly one point 4 A CAN net must not branch exception short cable stubs and has to be terminated with the characteristic impedance of the line generally 120 Ω 10 at both ends between the signals CAN_L and CAN_H and not at GND 5 Keep cab...

Страница 15: ...5 Example for proper wiring with single shielded single twisted pair wires 6 1 3 Termination Use external termination plugs because they can be rediscovered more easily than internal terminations within the CAN devices 9 pin DSUB termination connectors with male and female contacts and earth terminal are available as accessories Page 16 of 25 Hardware Manual Doc No C 2066 21 Rev 1 4 CAN USB 2 ...

Страница 16: ...ubs and has to be terminated with the characteristic impedance of the line generally 120 Ω 10 at both ends between the signals CAN_L and CAN_H and not at GND 5 Keep cable stubs as short as possible l 0 3 m 6 Select a working combination of bit rate and cable length 7 Keep away CAN cables from disturbing sources If this can not be avoided double shielded cables are recommended Figure 6 CAN wiring f...

Страница 17: ... for proper wiring with single shielded double twisted pair cables 6 2 3 Termination Use external termination plugs because they can later be rediscovered more easily than internal terminations within the CAN devices A 9 pin DSUB connector with integrated switchable termination resistor can be ordered e g from ERNI ERBIC CAN BUS MAX female contacts order no 154039 Page 18 of 25 Hardware Manual Doc...

Страница 18: ...e delaying the CAN signals esd modules typically reach a wire length of 37 m at 1 Mbit s within a closed net without impedance disturbances like e g cable stubs 0 3 m Bit rate Kbits s Typical values of reachable wire length with esd interface lmax m CiA recommendations 07 95 for reachable wire lengths lmin m 1000 800 666 6 500 333 3 250 166 125 100 66 6 50 33 3 20 12 5 10 37 59 80 130 180 270 420 ...

Страница 19: ...93 022 016 UL appr BUS Schleppflex PUR C 1x 2x 0 25 mm Order No 94 025 016 UL appr 6 5 2 Cable for Heavy Industrial Environment Applications Four Wire Manufacturer Cable Type U I LAPP GmbH Schulze Delitzsch Straße 25 70565 Stuttgart Germany www lappkabel com e g UNITRONIC BUS CAN UL CSA 2x 2x 0 22 UL CSA approved Part No 2170261 UNITRONIC BUS FD P CAN UL CSA 2x 2x 0 25 UL CSA approved Part No 2170...

Страница 20: ... To test it please 1 Turn off all power supplies of the attached CAN nodes 2 Measure the DC resistance between CAN_H and CAN_L at the ends of the network see figure above and at the centre of the network if the network cable consists of more than one line section The measured value should be between 50 Ω and 70 Ω The measured value should be nearly the same at each point of the network If the valu...

Страница 21: ...g A CAN bus might possibly still be able to transmit data if there is a short circuit between CAN_GND and CAN_L but the error rate will increase strongly Make sure that there is no short circuit between CAN_GND and CAN_L 7 4 CAN_H CAN_L Voltage Each node contains a CAN transceiver that outputs differential signals When the network communication is idle the CAN_H and CAN_L voltages are approximatel...

Страница 22: ...circuits may increase the leakage current in these circuits To measure the current leakage through the CAN circuits please use an resistance measuring device and 1 Switch off the node and disconnect it from the network see figure below 2 Measure the DC resistance between CAN_H and CAN_GND see figure below 3 Measure the DC resistance between CAN_L and CAN_GND see figure below The measured resistanc...

Страница 23: ...Declaration of Conformity 8 Declaration of Conformity Page 24 of 25 Hardware Manual Doc No C 2066 21 Rev 1 4 CAN USB 2 ...

Страница 24: ... PDF Manuals Manuals are available in English and usually in German as well Available manuals are listed in the following table Please download the manuals as PDF documents from our esd website www esd eu for free Manuals Order No CAN USB 2 MD Hardware manual in German C 2066 21 CAN USB 2 ME Hardware manual in English C 2066 21 CAN API ME API manual 1 2 Functions English API manual 2 2 Installatio...

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