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ESD electronic CAN-USB-Mini, Установка оборудования и технические данные

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Technical Data

CAN-USB-Mini

Hardware Manual • Doc. No.: C.2064.20 / Rev. 1.4

Page 11 of  22

3.3 CAN Interface

Number of CAN interfaces

1

CAN protocol

ISO 11898-1 
(11 and 29 bit CAN identifier are supported)

Physical Layer

CAN High Speed interface according to ISO 11898-2,
transmission rate programmable from 10 Kbit/s to 1 Mbit/s

Bus termination

has to be set externally

Electrical isolation of CAN-
interfaces from other units

via optical couplers and DC/DC converters

Table 3.3:

 Data of CAN interface

Attention:

When CAN-frames are received the simultaneous coincidence of the following
conditions may cause data loss:
1. CAN 2.0A frames (CAN 2.0B frames are uncritical)
2. bit rate = 1 Mbit/s (lower bit rates are uncritical)
3. A longer period of 100% busload (small bursts are transmitted error-free)
4. CAN frames with data length 

#

 1 byte (no data loss at frames with 2...8 bytes!)

The software indicates this with an error-event (see manual: ‘CAN-API, Function
Description”) 

3.4 Software Support 

For the CAN-USB-Mini  CAN layer 2 drivers (CAN-API) are available for Windows 2K/XP, Windows
XP x64 and Windows CE. Linux driver are available up to kernel version 2.6.4.

CANopen support is available for Windows 2K/XP, Windows XP x64 and Linux (up to kernel version
2.6.4).

Содержание CAN-USB-Mini

Страница 1: ...of 22 esd electronic system design gmbh Vahrenwalder Str 207 30165 Hannover Germany www esd eu Fax 0511 37 29 8 68 Phone 0511 37 29 80 International 49 5 11 37 29 80 CAN USB Mini USB 1 1 CAN Interface Hardware Installation and technical Data to Product C 2064 xx ...

Страница 2: ...formance or design esd assumes no responsibility for the use of any circuitry other than circuitry which is part of a product of esd gmbh esd does not convey to the purchaser of the product described herein any license under the patent rights of esd gmbh nor the rights of others esd electronic system design gmbh Vahrenwalder Str 207 30165 Hannover Germany Phone 49 511 372 98 0 Fax 49 511 372 98 68...

Страница 3: ...B Rev 1 2 Changes in chapters The changes in the document listed below affect changes in the hardware as well as changes in the description of facts only Chapter Changes versus previous version New case colour 3 4 3 5 Note Linux driver only supported up to kernel version 2 6 4 inserted 4 2 Picture USB pin assignment corrected Technical details are subject to change without further notice ...

Страница 4: ...rcuits may result Protect the device from dust moisture and steam Remove all cables before cleaning Clean the device with a slightly moist lint free cloth Intensivecleaning agents or solvents are not suitable Protect the device from shocks and vibrations The device may become warmduring normal use Always allow adequate ventilation around the device and use care when handling Do not operate the dev...

Страница 5: ...ical Data 10 3 1 General technical Data 10 3 2 USB Interface and Microcontroller 10 3 3 CAN Interface 11 3 4 Software Support 11 3 5 Order Information 12 4 Connector Assignment 13 4 1 CAN Interface at DSUB9 Connector 13 4 2 USB Socket 14 5 Correctly Wiring Electrically Isolated CAN Networks 15 6 CAN Bus Troubleshooting Guide 19 6 1 Termination 19 6 2 CAN_H CAN_L Voltage 20 6 3 Ground 20 6 4 CAN Tr...

Страница 6: ...am of CAN USB Mini module The CAN USB Mini module is an intelligent CAN interface with a 16 bit microcontroller for local CAN data management The ISO 11898 compliant CAN interface allows a maximum data transfer rate of 1 Mbit s Like many other features 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 opt...

Страница 7: ...Overview CAN USB Mini Hardware Manual Doc No C 2064 20 Rev 1 4 Page 7 of 22 1 2 Case View with LED and Connector Description Figure 1 2 1 CAN Interface and LEDs Figure 1 2 2 USB Interface ...

Страница 8: ... a node ID is assigned to the USB module short time switch off the module receives data from USB bus or sends data on USB bus Power LED300C on module is in operation the 5 V power supply is applied to the module CAN LED300B flashes data is received or send on the CAN bus OK LED300A on CAN interface is initialized bit rates are set Table 1 3 Description of LED display ...

Страница 9: ...f the PC 3 Connect the CAN bus to the 9 pin male DSUB connector Please remember that the CAN bus has to be terminated at both ends esd offers T connectors and terminators Additionally the CAN GND signal has to be grounded at exactly one point in the CAN network Therefore the CAN termination connectors have got a grounding contact A CAN device whose CAN interface is not electrically isolated corres...

Страница 10: ...ies B USB bus Case dimensions 55 mm x 55 mm x 25 mm IP rating IP 40 Weight 70 g Table 3 1 General data of CAN USB Mini Note Please note that the current consumption of the module of 350 mA has to be supplied high powered bus powered device The maximum current consumption of 350 mA has to be guaranteed also if a hub is used Therefore it is highly recommended to use a self powered hub 3 2 USB Interf...

Страница 11: ...rames are received the simultaneous coincidence of the following conditions may cause data loss 1 CAN 2 0A frames CAN 2 0B frames are uncritical 2 bit rate 1 Mbit s lower bit rates are uncritical 3 A longer period of 100 busload small bursts are transmitted error free 4 CAN frames with data length 1 byte no data loss at frames with 2 8 bytes The software indicates this with an error event see manu...

Страница 12: ... C 2064 02 CAN DRV LCD CAN layer 2 CAN API object licence for Windows incl CD ROM C 1101 02 CANopen LCD CANopen object licence for Windows incl CD ROM C 1101 06 CAN USB Mini ME User manual in English 1 C 2064 21 CAN API ME CAN API manual in English to C 1101 02 1 C 2001 21 1 If ordered together with the module the manual is included in the shipment Table 3 5 Order information ...

Страница 13: ...ition Pin Assignment Signal Pin Signal 1 reserved CAN_GND 6 2 CAN_L CAN_H 7 3 CAN_GND reserved 8 4 reserved reserved 9 5 Shield 9 pin DSUB connector Signal Description CAN_L CAN_H CAN signal lines CAN_GND reference potential of local CAN physical layer CAN_GND optional reference potential of local CAN physical layer Shield Shielding connected with case of 9 pin DSUB connector reserved reserved for...

Страница 14: ... Page 14 of 22 2 3 4 1 Connector Assignment 4 2 USB Socket Attention The module may only be operated at USB nets with USB interface version numbers 1 1 interface Pin Position Pin Assignment Pin Signal 1 VBUS 2 D 3 D 4 GND Shell Shield USB socket series B ...

Страница 15: ...1 A CAN net must not branch exception short dead end feeders and has to be terminated by the wave impedance of the wire generally 120 W 10 at both ends between the signals CAN_L and CAN_H and not at GND 2 A CAN data wire requires two twisted wires and a wire to conduct the reference potential CAN_GND For this the shield of the wire should be used 3 The reference potential CAN_GND has to be connect...

Страница 16: ...can later be found again more easily 9 pin DSUB terminator with male and female contacts and earth terminal are available as accessories Earthing CAN_GND has to be conducted in the CAN wire because the individual esd modules are electrically isolated from each other CAN_GND has to be connected to the earth potential PE at exactly one point in the net each CAN user without electrically isolated int...

Страница 17: ... a closed net without impedance disturbances like e g longer dead end feeders Bit rate Kbit 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 80 130 180 270 420 570 710 1000 1400 2000 3600 5400 7300 25 50 100 250 500 650 1000 2500 5000 Table Reachable...

Страница 18: ...CAN UL CSA UL CSA approved ConCab GmbH Äußerer Eichwald 74535 Mainhardt Germany www concab de e g BUS PVC C 1 x 2 x 0 22 mm Order No 93 022 016 UL appr BUS Schleppflex PUR C 1 x 2 x 0 25 mm Order No 94 025 016 UL appr SAB Bröckskes GmbH Co KG Grefrather Straße 204 212b 41749 Viersen Germany www sab brockskes de e g SABIX CB 620 1 x 2 x 0 25 mm Order No 56202251 CB 627 1 x 2 x 0 25 mm Order No 0627...

Страница 19: ...ne and load impedance are equal these reflections are eliminated This test measures the series resistance of the CAN data pair conductors and the attached terminating resistors 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 middle and ends of the network see figure above The measured value should be between 50 S ...

Страница 20: ...4 0 V If it is lower than 2 0 V or higher than 4 0 V it is possible that one or more nodes have faulty transceivers For a voltage lower than 2 0 V please check CAN_H and CAN_L conductors for continuity For a voltage higher than 4 0 V please check for excessive voltage To find the node with a faulty transceiver please test the CAN transceiver resistance see next page 6 3 Ground The shield of the CA...

Страница 21: ...e or both of the 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 Disconnect the node from the network Leave the node unpowered 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 belo...

Страница 22: ......

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