ESD C.2066.21, CAN-USB/2 Hardware Manual

CAN-USB/2

USB 2.0-CAN-Interface

Hardware Manual

to Product C.2066.xx

CAN-USB/2

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

Page 1 of 25

esd electronic system design gmbh
Vahrenwalder Str. 207 • 30165 Hannover • Germany
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.
© 2013 esd electronic system design gmbh, Hannover

esd electronic system design gmbh
Vahrenwalder Str. 207
30165 Hannover
Germany

Phone: [phone]
Fax: [phone]
E-Mail: [e-mail]
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.2066.21 / Rev. 1.4

CAN-USB/2

Document file:

I:\Texte\Doku\MANUALS\CAN\CAN-USB-2\Englisch\CAN-USB2_Hardware_en_14.odt

Date of print: 2013-03-06

Document type
number:

DOC0800

PCB version: CAN-USB/2 Rev. 1.2

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

1.4

6 Updated chapter 'Correctly Wiring Electrically Isolated CAN Networks'

2013-03-068 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.2066.21 / Rev. 1.4

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 60950-1).

● 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 60950-1, 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.2066.21 / Rev. 1.4

CAN-USB/2

Table of contents

1. Overview......................................................................................................................................7

2. Case View with LED and Connector Description..........................................................................8

2.1 LED-Displays.........................................................................................................................9

3. Hardware Installation ................................................................................................................. 10

4. Technical Data...........................................................................................................................11

4.1 General Technical Data.......................................................................................................11

4.2 USB-Interface and Microcontroller.......................................................................................11

4.3 CAN Interface...................................................................................................................... 12

4.4 Serial Interface.....................................................................................................................12

4.5 Software Support.................................................................................................................12

5. Connector Assignments.............................................................................................................13

5.1 CAN Interface at DSUB9 Connector....................................................................................13

5.2 USB Socket......................................................................................................................... 14

6. Correctly Wiring Electrically Isolated CAN Networks..................................................................15

6.1 Light Industrial Environment (Single Twisted Pair Cable).....................................................15

6.1.1 General 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)...............................20

7. CAN Troubleshooting Guide.......................................................................................................21

7.1 Termination..........................................................................................................................21

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.2066.21 / Rev. 1.4

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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 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 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

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+5 V=

+5 V=

Physical

CAN

Layer

C
A
N
B
U
S

CAN

ARM 7

Microcontroller

USB Controller

LEDs

Digital

Isolator

Electrical Isolation

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.2066.21 / Rev. 1.4

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. 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: Description of LED display

CAN-USB/2

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

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