ESD C.2066.21 User manual

CAN-USB/2
USB 2.0-CAN-Interface
Hardware Manual
to Product C.2066.xx
CAN-USB/2 Hardware Manual • Doc. No.: C.2066.2 / Rev. .4 Page of 25
esd electronic system design gmbh
Vahrenwalder Str. 207 • 30165 Hannover • ermany
http://www.esd.eu
Phone: [phone] • Fax: [phone]

N O T E
The information in this document has been carefully checked and is believed to be entirely reliable.
esd makes no warranty of any kind with regard to the material in this document, and assumes no
responsibility for any errors that may appear in this document. In particular descriptions and
technical data specified in this document may not be constituted to be guaranteed product features
in any legal sense.
esd reserves the right to make changes without notice to this, or any of its products, to improve
reliability, performance or design.
All rights to this documentation are reserved by esd. Distribution to third parties, and reproduction
of this document in any form, whole or in part, are subject to esd's written approval.
© 20 3 esd electronic system design gmbh, Hannover
esd electronic system design gmbh
Vahrenwalder Str. 207
30 65 Hannover
Germany
Phone: [phone]
Fax: [phone]
E-Mail: [email protected]
Internet: www.esd.eu
Trademark Notices
CANopen® and CiA® are registered community trademarks of CAN in Automation e.V.
Linux® is the registered trademark of Linus Torvalds in the United States and/or other countries.
Windows is a registered trademark of Microsoft Corporation in the United States and other countries.
All other trademarks, product names, company names or company logos used in this manual are reserved by their
respective owners.
Page 2 of 25 Hardware Manual • Doc. No.: C.2066.2 / Rev. .4 CAN-USB/2

Document file I:\Texte\Doku\MANUALS\CAN\CAN-USB-2\Englisch\CAN-USB2_Hardware_en_ 4.odt
Date of print 20 3-03-06
Document type
number DOC0800
PCB version CAN-USB/2 Rev. .2
Document History
The changes in the document listed below affect changes in the hardware as well as changes in
the description of the facts, only.
Revision Chapter Changes versus previous version Date
.4
6 Updated chapter 'Correctly Wiring Electrically Isolated CAN Networks'
20 3-03-068 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.2066.2 / Rev. .4 Page 3 of 25

Safety Instructions
● When working with CAN-USB/2 follow the instructions below and read the manual carefully to protect yourself from
injury and the CAN-USB/2 from damage.
● Do not open the housing of the CAN-USB/2.
● Never let liquids get inside the CAN-USB/2. Otherwise, electric shocks or short circuits may result.
● Protect the CAN-USB/2 from dust, moisture and steam.
● Protect the CAN-USB/2 from shocks and vibrations.
● The CAN-USB/2 may become warm during normal use. Always allow adequate ventilation around the CAN-USB/2 and
use care when handling.
● Do not operate the CAN-USB/2 adjacent to heat sources and do not expose it to unnecessary thermal radiation.
Ensure an ambient temperature as specified in the technical data.
● Do not use damaged or defective cables to connect the CAN-USB/2 and follow the CAN wiring hints in chapter:
"Correctly Wiring Electrically Isolated CAN Networks".
● In case of damages to the device, which might affect safety, appropriate and immediate measures must be taken, that
exclude an endangerment of persons and objects.
● Current circuits which are connected to the device have to be sufficiently protected against hazardous voltage (SELV
according to EN 60950- ).
● The CAN-USB/2 may only be driven by power supply current circuits, that are contact protected.
A power supply, that provides a safety extra-low voltage (SELV or PELV) according to EN 60950- , complies with this
conditions.
Qualified Personal
This documentation is directed 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 the EU regulations and EMC standards
printed in the conformity declaration at the end of this manual.
Warning In a residential, commercial or light industrial environment the CAN-USB/2 may cause radio
interferences in which case the user may be required to take adequate measures.
Intended Use
The intended use of the CAN-USB/2 is the operation as an USB 2.0-CAN-Interface
The guarantee given by esd does not cover damages which result from improper use, usage not in
accordance with regulations or disregard of safety instructions and warnings.
● The operation of the CAN-USB/2 in hazardous areas, or areas exposed to potentially explosive materials is
not permitted.
● The operation of the CAN-USB/2 for medical purposes is prohibited.
Service Note
The CAN-USB/2 does not contain any parts that require maintenance by the user. The CAN-USB/2 does not
require any manual configuration of the hardware. Unauthorized intervention in the device voids warranty
claims.
Disposal
Devices which have become defective in the long run have to be disposed in an appropriate way or have to
be returned to the manufacturer for proper disposal. Please, make a contribution to environmental protection.
Page 4 of 25 Hardware Manual • Doc. No.: C.2066.2 / Rev. .4 CAN-USB/2

Table of contents
. Overview......................................................................................................................................7
2. Case View with LED and Connector Description..........................................................................8
2. LED-Displays.........................................................................................................................9
3. Hardware Installation ................................................................................................................. 0
4. Technical Data...........................................................................................................................
4. General Technical Data.......................................................................................................
4.2 USB-Interface and Microcontroller.......................................................................................
4.3 CAN Interface...................................................................................................................... 2
4.4 Serial Interface..................................................................................................................... 2
4.5 Software Support................................................................................................................. 2
5. Connector Assignments............................................................................................................. 3
5. CAN Interface at DSUB9 Connector.................................................................................... 3
5.2 USB Socket......................................................................................................................... 4
6. Correctly Wiring Electrically Isolated CAN Networks.................................................................. 5
6. Light Industrial Environment (Single Twisted Pair Cable)..................................................... 5
6. . General Rules............................................................................................................. 5
6. .2 Cabling........................................................................................................................ 6
6. .3 Termination................................................................................................................. 6
6.2 Heavy Industrial Environment (Double Twisted Pair Cable)................................................. 7
6.2. General Rules............................................................................................................. 7
6.2.2 Device Cabling............................................................................................................ 8
6.2.3 Termination................................................................................................................. 8
6.3 Electrical Grounding............................................................................................................. 9
6.4 Bus Length........................................................................................................................... 9
6.5 Examples for CAN Cables...................................................................................................20
6.5. Cable for Light Industrial Environment Applications (Two-Wire)..................................20
6.5.2 Cable for Heavy Industrial Environment Applications (Four-Wire)...............................20
7. CAN Troubleshooting Guide.......................................................................................................2
7. Termination..........................................................................................................................2
7.2 Electrical Grounding.............................................................................................................22
7.3 Short Circuit in CAN Wiring..................................................................................................22
7.4 CAN_H/CAN_L-Voltage ......................................................................................................22
7.5 CAN Transceiver Resistance Test ......................................................................................23
8. Declaration of Conformity...........................................................................................................24
9. Order Information.......................................................................................................................25
CAN-USB/2 Hardware Manual • Doc. No.: C.2066.2 / Rev. .4 Page 5 of 25

Overview
1. Overview
Figure 1 Block-circuit diagram of CAN-USB/2 module
The CAN-USB/2 module is an intelligent CAN interface with an ARM7 micro controller for local
CAN data management. The module supports the USB 2.0 Hi-Speed interface with data transfer
rates of 480 Mbit/s.
The ISO 898-compliant CAN interface allows a maximum data transfer rate of 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 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.2066.2 / Rev. .4 Page 7 of 25
+5 V=
+5 V=
Physical
CAN
Layer
C
A
N
B
U
S
CAN
ARM 7
Microcontroller
USB Controller
LEDs
Digital
solator
Electrical solation
DC/DC
Converter
DSUB9
CiA pinning
Power
Supply
5 V(DC) USB-
Connector

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.2066.2 / Rev. .4 CAN-USB/2

Case View with LED and Connector Description
2.1 LED-Displays
LED
NAME Number Status Description
USB LED300D on
USB module is enumerated
(a node-ID is assigned to the USB module)
Power LED300C on
module is in operation,
the 5 V power supply is applied to the module
CAN LED300B on data 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. 0 Hz)
CAN interface is initialized and in mode ‘Listen Only’;
the bit rate is already set
slow flashing
(appr. Hz)
CAN interface is initialized and in mode ‘Automatic
Baudrate Detection’ (from firmware version .0.0.4
and CAN driver version 2.5.2 on)
Table 1 Description of LED display
CAN-USB/2 Hardware Manual • Doc. No.: C.2066.2 / Rev. .4 Page 9 of 25

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! 4
. 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 0 of 25 Hardware Manual • Doc. No.: C.2066.2 / Rev. .4 CAN-USB/2

Technical Data
4. Technical Data
4.1 General Technical Data
Temperature
range 0...50°C ambient temperature
Humidity 90 %, non-condensing
Power supply
via USB 2.0 bus,
nominal voltage: 5 V
current consumption: max. 250 mA *
Connectors X2 0 (DSUB9/male) - CAN bus
X300 (USB socket, series B) - USB bus
Case
dimensions 55 mm x 55 mm x 25 mm
IP-rating IP 40
Weight 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
Microcontroller ARM7 microcontoller
Table 3 USB interface and microcontroller
CAN-USB/2 Hardware Manual • Doc. No.: C.2066.2 / Rev. .4 Page of 25