GridConnect CAN USB-232 User Manual

CAN USB-232

User Manual

Revision E August 1, 2016

Copyright and Trademark

Copyright 2012-2016, Grid Connect, Inc. All rights reserved.
No part of this manual may be reproduced or transmitted in any form for any purpose other than the

purchaser's personal use, without the express written permission of Grid Connect, Inc. Grid
Connect, Inc. has made every effort to provide complete details about the product in this manual, but
makes no warranty of any kind with regard to this material, including, but not limited to, the implied
warranties of merchantability or fitness for a particular purpose. In no event shall Grid Connect, Inc.
be liable for any incidental, special, indirect, or consequential damages whatsoever included but not
limited to lost profits arising out of errors or omissions in this manual or the information contained
herein.

Grid Connect, Inc. products are not designed, intended, authorized or warranted for use as
components in systems intended for surgical implant into the body, or in other applications intended
to support or sustain life, or in any other application in which the failure of a Grid Connect, Inc.
product could create a situation where personal injury, death, or severe property or environmental
damage may occur. Grid Connect, Inc. reserves the right to discontinue or make changes to its
products at any time without notice.

Grid Connect and the Grid Connect logo, and combinations thereof are registered trademarks of Grid
Connect, Inc. All other product names, company names, logos or other designations mentioned
herein are trademarks of their respective owners.

CAN USB-232 is a trademark of Grid Connect, Inc.

Grid Connect

1630 W. Diehl Rd.
Naperville, IL 60563, USA
Phone: [phone]

Technical Support

Phone: [phone]
Fax: [phone]
On-line: www.gridconnect.com

CAN USB-232 User Manual i

Date

Rev.

Author

Comments

04/19/2012

A

GR

Preliminary Release

10/15/12

B

GR

Updates to drawings

11/27/12

C

GR/DQ

New Features. V01.02

05/14/2015

D

GR/DQ

16-bit Timestamp for received messages

08/01/2016

E

GR/JK

Power input specifications

Disclaimer and Revisions

Operation of this equipment in a residential area is likely to cause interference in which case the
user, at his or her own expense, will be required to take whatever measures may be required to
correct the interference.

Attention: This product has been designed to comply with the limits for a Class B digital
device pursuant to Part 15 of FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment
generates, uses, and can radiate radio frequency energy, and if not installed and used in
accordance with this guide, may cause harmful interference to radio communications.

Changes or modifications to this device not explicitly approved by Grid Connect will void the user's
authority to operate this device.

The information in this guide may change without notice. The manufacturer assumes no
responsibility for any errors that may appear in this guide.

ii CAN USB-232 User Manual

Warranty

Grid Connect warrants each product to be free from defects in material and workmanship for a
period of ONE YEAR after the date of shipment. During this period, if a customer is unable to
resolve a product problem with Grid Connect Technical Support, a Return Material Authorization
(RMA) will be issued. Following receipt of a RMA number, the customer shall return the product to
Grid Connect, freight prepaid. Upon verification of warranty, Grid Connect will -- at its option -­repair or replace the product and return it to the customer freight prepaid. If the product is not under
warranty, the customer may have Grid Connect repair the unit on a fee basis or return it. No services
are handled at the customer's site under this warranty. This warranty is voided if the customer uses
the product in an unauthorized or improper way, or in an environment for which it was not designed.

Grid Connect warrants the media containing software and technical information to be free from
defects and warrants that the software will operate substantially for a period of 60 DAYS after the
date of shipment.

In no event will Grid Connect be responsible to the user in contract, in tort (including negligence),
strict liability or otherwise for any special, indirect, incidental or consequential damage or loss of
equipment, plant or power system, cost of capital, loss of profits or revenues, cost of replacement
power, additional expenses in the use of existing software, hardware, equipment or facilities, or
claims against the user by its employees or customers resulting from the use of the information,
recommendations, descriptions and safety notations supplied by Grid Connect. Grid Connect liability
is limited (at its election) to:

1) refund of buyer's purchase price for such affected products (without interest)

2) repair or replacement of such products, provided that the buyer follows the above procedures.
There are no understandings, agreements, representations or warranties, expressed or implied,

including warranties of merchantability or fitness for a particular purpose, other than those
specifically set out above or by any existing contract between the parties. The contents of this
document shall not become part of or modify any prior or existing agreement, commitment or
relationship.

CAN USB-232 User Manual iii

Contents

Table of Contents

1. Overview ........................................................................................................................... 1-1

1.1 Introduction ......................................................................................................... 1-1

1.2 Hardware Description ......................................................................................... 1-3

1.3 Model Description ............................................................................................... 1-3

1.4 CAN Network ..................................................................................................... 1-4

1.5 Additional Documentation .................................................................................. 1-5

2. Getting Started ................................................................................................................. 2-6

2.1 Driver Installation ............................................................................................... 2-6

2.1.1 TeraTerm Install .................................................................................. 2-7

2.1.2 USB Drivers ........................................................................................ 2-7

2.1.3 COM Port Assignment ........................................................................ 2-8

2.1.4 USBView ............................................................................................ 2-8

2.2 Hardware Installation .......................................................................................... 2-9

2.2.1 RS232 Serial Cable ............................................................................. 2-9

2.2.2 USB Cable Wiring ............................................................................ 2-10

2.2.3 Power Options ................................................................................... 2-10

2.2.4 Item Locator CAN-232 ..................................................................... 2-11

2.2.5 Item Locator CAN-USB ................................................................... 2-11

2.2.6 Input Power ....................................................................................... 2-11

2.2.7 Isolated Power Option ....................................................................... 2-12

2.2.8 OEM Options .................................................................................... 2-12

2.2.9 Configuration Push Button ................................................................ 2-13

2.2.10 CAN Driver ..................................................................................... 2-14

2.2.11 TTL Option ..................................................................................... 2-15

2.3 Entering Configuration Mode ........................................................................... 2-16

2.3.1 RS232 Interface: ............................................................................... 2-16

2.3.2 USB Interface: ................................................................................... 2-16

2.3.3 Config Button .................................................................................... 2-17

2.4 Mode Options .................................................................................................... 2-19

2.4.1 Get Mode ........................................................................................... 2-19

2.4.2 Set Mode ........................................................................................... 2-19

2.5 COM Options .................................................................................................... 2-19

2.5.1 Get Com Port .................................................................................... 2-19

2.5.2 Set Com Port ..................................................................................... 2-20

2.6 CAN Port Options ............................................................................................. 2-20

2.6.1 Defining the CAN Bit-Time.............................................................. 2-20

2.6.2 CAN Bus State During Configuration .............................................. 2-20

2.6.3 Get CAN Port .................................................................................... 2-21

2.6.4 Set CAN Port Baud Sample Point ..................................................... 2-21

2.6.5 Set CAN Port Baud Sample Point Tolerance ................................... 2-22

2.6.6 Set CAN Port Baud Sample Point Browse ....................................... 2-22

2.6.7 Set CAN Port Baud Sample Point Tolerance .................................... 2-23

iv CAN USB-232 User Manual

2.6.8 Set CAN Port (CLK_DIV BRG TSEG1 TSEG2 SJW) ..................... 2-23

2.7 CAN Command Mode ....................................................................................... 2-24

2.7.1 Message String Syntax ...................................................................... 2-25

2.7.2 Normal CAN Message....................................................................... 2-25

2.7.3 RTR CAN Message ........................................................................... 2-26

2.7.4 Appending CR/LF To Received Command Strings .......................... 2-26

2.7.5 Binary Formatted Messages .............................................................. 2-27

2.7.6 Get CAN Command Mode Settings .................................................. 2-29

2.7.7 Set CAN Command Mode Filter On/Off........................................... 2-29

2.7.8 Set CAN Command Mode RX Operating Mode ............................... 2-30

2.7.9 Set CAN Command Mode RX Input Format .................................... 2-30

2.7.10 Set CAN Command Mode TX Output Format ................................ 2-30

2.7.11 Set CAN Command Mode Message Output Termination ............... 2-31

2.8 CAN Virtual Command Mode .......................................................................... 2-31

2.8.1 The ‘XMIT’ and ‘RCEV’ Identifiers ................................................. 2-32

2.8.2 ‘XMIT’ Identifier .............................................................................. 2-32

2.8.3 ‘RCEV’ Identifier .............................................................................. 2-32

2.8.4 Get CAN Virtual Circuit Setting ....................................................... 2-33

2.8.5 Set CAN Virtual Circuit TX ID ......................................................... 2-34

2.8.6 Set CAN Virtual Circuit RX ID ........................................................ 2-35

2.8.7 Set CAN Virtual Circuit Forced Send Code ...................................... 2-36

2.8.8 Set CAN Virtual Circuit Forced Wake Code .................................... 2-37

2.8.9 Set CAN Virtual Circuit Timeout Send ............................................. 2-38

2.8.10 Set CAN Virtual Circuit Wake Timeout ......................................... 2-39

2.8.11 Set CAN Virtual Circuit Wait after Wakeup ................................... 2-40

2.8.12 Set CAN Virtual Circuit Wakeup Message ..................................... 2-41

2.9 Defining Filter Entries ....................................................................................... 2-42

2.10 Using Message Filters ..................................................................................... 2-42

2.10.1 How Filtering Works ....................................................................... 2-42

2.10.2 Setting Up Message Filters .............................................................. 2-43

2.10.3 Get CAN Filter ................................................................................ 2-43

2.10.4 Set CAN Filter ................................................................................. 2-44

2.10.5 Delete CAN Filter ............................................................................ 2-44

2.10.6 Delete CAN Filter Range ................................................................ 2-45

2.10.7 Delete CAN Filter All ...................................................................... 2-45

2.11 Config Entry Commands ................................................................................. 2-46

2.11.1 Get cfgcmd cm................................................................................. 2-47

2.11.2 Set cfgcmd cm enable=YES | NO ................................................... 2-47

2.11.3 Get cfgcmd vc .................................................................................. 2-47

2.11.4 set cfgcmd vc enable=YES | NO ..................................................... 2-48

2.11.5 set cfgcmd vc tbeg=timeout ............................................................. 2-48

2.11.6 set cfgcmd vc tend=timeout ............................................................. 2-48

2.11.7 set cfgcmd vc tid=timeout ............................................................... 2-48

2.11.8 set cfgcmd vc seq=”sequence” ........................................................ 2-48

2.12 CAN Timestamp Commands ........................................................................... 2-48

2.12.1 get timestamp ................................................................................... 2-49

2.12.2 set timestamp ................................................................................... 2-50

2.13 CAN Timeout Commands ............................................................................... 2-50

2.13.1 Get can timeout ................................................................................ 2-50

2.13.2 Set can timeout can_tx_busy=timeout ............................................. 2-50

2.14 Serial Number in Command Mode .................................................................. 2-51

Contents

CAN USB-232 User Manual v

Contents

2.14.1 get sernumcmd cm .......................................................................... 2-51

2.14.2 set sernumcmd cm enable ............................................................... 2-51

2.15 Profiles ............................................................................................................ 2-52

2.15.1 Set Active Profile Number .............................................................. 2-52

2.15.2 Copy Profile .................................................................................... 2-52

2.15.3 Profile Note ..................................................................................... 2-53

2.15.4 Profile Note # .................................................................................. 2-53

2.15.5 Profile Note All ............................................................................... 2-53

2.15.6 Profile Note Text ............................................................................. 2-53

2.15.7 Profile Note #=Text ........................................................................ 2-54

2.15.8 Set Active Profile to Default ........................................................... 2-54

2.15.9 Set Specific Profile to Default ......................................................... 2-54

2.15.10 Set All Profiles to Default ............................................................. 2-54

2.16 Serial Number in Config Mode ....................................................................... 2-54

2.16.1 CAN Port SERNUM Interaction ..................................................... 2-54

2.16.2 Get Serial Number .......................................................................... 2-54

2.16.3 Get Version Number ....................................................................... 2-55

2.17 Test Options .................................................................................................... 2-55

2.17.1 Cycling LED Indicators .................................................................. 2-55

2.17.2 Generating CAN Square Wave ....................................................... 2-55

2.17.3 Test LEDs ....................................................................................... 2-55

2.17.4 Test LEDs and CAN Bus ................................................................ 2-55

2.17.5 Exit .................................................................................................. 2-55

2.18 XMODEM Download ..................................................................................... 2-56

2.19 Technical Support ........................................................................................... 2-56

vi CAN USB-232 User Manual

Getting Started

1. Overview

1.1 Introduction

The CAN USB-232 enables the use of an RS232 or USB COM port to send and receive CAN messages on
an ISO11898 CAN network.

The CAN USB-232 can be configured to operate in either the command mode or the virtual circuit mode,
providing the user with a choice as to the type of functionality desired.

In the command mode, the CAN USB-232 is capable of sending and receiving arbitrary CAN messages
through the serial port, providing a complete CAN-232 or CAN-USB interface. This mode also supports
message filtering to limit the range of CAN identifiers that will be received.

In the virtual circuit mode, the CAN USB-232 creates a transparent ‘virtual’ link between itself and another
CAN USB-232, providing the ability for applications to use a CAN network as a point-to-point link,
supporting full-duplex exchange of arbitrary stream data.

The CAN USB-232 operating mode and all other configuration parameters are accessed through the ‘config’
button. Pressing the button causes the CAN USB-232 to enter configuration mode where it then prompts the
user to modify configuration parameters.

In addition to parameter configuration, the configuration mode also provides diagnostic tools to assist in the
measurement of bus signal propagation time and termination characteristics.

The CAN USB-232 represents an evolution of the earlier CAN-uVCCM and CAN-USB product lines,
providing a performance increase and enhanced features, while retaining backward compatibility.

There are two hardware platforms, both of which execute the same firmware, with one providing a CAN­RS232 interface and the other a CAN-USB interface. The CAN-RS232 version is shown below.

The new units are based on an ARM Cortex-M3 32-bit microcontroller, providing 100 MIPS of processing
power with an extremely efficient instructions set. The performance increase over the legacy
microcontroller is approximately 25 times faster.

All device interfaces (UART, CAN, USB) have built-in hardware buffers that allow for high-speed data
flow without data loss. Hardware buffering, coupled with a fast and efficient CPU, allows each interface to
operate at its maximum rated limit.

CAN USB-232 User Manual 1-1

Troubleshooting

The USB interface has been re-designed based on a parallel-port version of the current USB-to-UART
interface chip, providing 100% USB interface speed while using the same USB driver software as the earlier
CAN-USB unit. The application interface remains identical, providing 100% backward compatibility at the
USB level while adding a major performance boost.

Both versions support isolated and non-isolated CAN configurations. This option must be selected at the
time of purchase.

With the additional microcontroller FLASH memory available, the new units support a user-accessible boot­loader, allowing users to download firmware updates by themselves.

By using the time-tested and very simple XMODEM protocol widely available in terminal emulation
programs, end-users can download firmware directly through the COM-RS232 or COM-USB port to update
the device.

To protect against unauthorized duplication of hardware, the firmware is encrypted with a 256-bit AES
cipher. The boot loader decrypts and verifies authenticity of the firmware to ensure only an authorized
version is being downloaded.

1-2 CAN USB-232 User Manual

1.2 Hardware Description

COM RX Serial Receive Data

CAN TX Transmit Data

CAN RX Receive Data

COM TX Serial Transmit Data

Power

COM RX Serial Receive Data

CAN TX Transmit Data

CAN RX Receive Data

COM TX Serial Transmit Data

Power

The following drawing shows the location and function of the LEDs.

Getting Started

1.3 Model Description

There are two hardware platforms, both of which execute the same firmware, with one providing a CAN­RS232 interface and the other a CAN-USB interface. The CAN-RS232 platform has the option of DTE
(male) or DCE(female) on the RS232 serial cable, and the option of a Male or Female DB9 CAN connector.

CAN USB-232 User Manual 1-3

Troubleshooting

PIN

Function

2

CAN-L

3

CAN-Ground

6

CAN-Ground

7

CAN-H

1.4 CAN Network

Before trying to send commands to the CAN USB-232, make sure the unit is attached to a valid CAN
network with at least one other node attached and running. Without another node on the network, the CAN
USB-232 will attempt to transmit the message indefinitely (as per CAN 2.0A/B specifications).

Make sure there are terminating resistors on the network. A terminating resistance of 120 ohms is
appropriate for ISO11898 drivers. Attempts to communicate over the CAN network without terminating
resistors can lead to erratic behavior and many long hours of trouble shooting.

CAN ISO11898 specifies a three wire bus: CAN_H, CAN_L, and GROUND. Failure to provide a common
ground between network nodes will create some weird behavior. At best, the system will appear to
communicate correctly until either the weather changes, you touch something, or the date changes. CAN_H
and CAN_L form a differential pair and each one must be referenced to ground in order to work properly.

1-4 CAN USB-232 User Manual

Getting Started

Title

Description

File Name

CAN­USB/232
User
Manual

This manual
in PDF
format.

CAN_USB232_UM.pdf

AN-160

COM Port
Assignment

AN_160_COMPort_Assigment_User_Guide.pdf

AN-134

Drivers for
MAC OS

AN_134_FTDI_Drivers_Installation_Guide_for_MAC_OSX.pdf

AN-104

Drivers for
Window XP

AN_104_FTDI_Drivers_Installation_Guide_for_WindowsXP(FT_000093).pdf
See Note 1.

AN-119

Drivers for
Windows 7

AN_119_FTDI_Drivers_Installation_Guide_for_Windows7.pdf
See Note 1.

Windows
CE 4.2-5.2

Installation
Guide

Windows_CE_Installation_Guide.pdf
See Note 2.

Windows
CE 6.0

Installation
Guide

Windows_CE_Installation_Guide.pdf
See Note 2.

Help Tips

Additional
Help
Information

help-tips.pdf

1.5 Additional Documentation

This manual provides basic information about the CAN USB-232 installation and operation. For specific
details about configuration and operation, please see the following manuals.

The following documents are available on the product CD.

Note 1: Includes the following versions of the Windows operating system: Windows XP, Windows Server 2003,
Windows Vista, Windows Server 2008, Windows 7, Windows Server 2008 R2.

Note 2: Includes the following versions of Windows CE 4.2-5.2 based operating systems: Windows Mobile 2003,
Windows Mobile 2003 SE, Windows Mobile 5, Windows Mobile 6, Windows Mobile 6.1 ,Windows Mobile 6.5

CAN USB-232 User Manual 1-5

Troubleshooting

2. Getting Started

2.1 Driver Installation

Note: Install the USB drivers ONLY if you are using a CAN-USB. The files are not needed for CAN-232.

1. Insert the product CD into your CD-ROM drive. The CD will automatically start and display the main

window.

If the CD does not launch automatically:
a) Locate your CD Drive. Example: CD-RW Drive (D:)
b) Double-click on autorun.exe to start the CD browser.

Figure 1 - CD Main Window

1. Click on an item for more information.

2. Click the Browse CD button to view the contents of the CD.

3. Click the Go to Software Page button to view software options.

2-6 CAN USB-232 User Manual

Getting Started

2.1.1 TeraTerm Install

Click this button to install TeraTerm terminal emulation software. This program is very useful for viewing
the configuration menus.

2.1.2 USB Drivers

Drivers for Linux, MAC OS and Windows can be found on individual folders on the software CD. Please
read the application note if available.

2.1.2.1 Linux

There are two files available for Linux., one in the x64 (64-bit) folder and another in the x86 (32-bit) folder.

2.1.2.2 MAC OS X

Please read the AN_134_FTDI_Drivers_Installation_Guide_for_MAC_OSX.pdf file in the Mac OS X
folder on the software CD.

2.1.2.3 Windows

The drivers for Windows includes the following versions of the Windows operating system: Windows XP,
Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7, Windows Server 2008 R2.

Please read the Windows application note:
AN_104_FTDI_Drivers_Installation_Guide_for_WindowsXP(FT_000093).pdf.

Please read the Windows 7 application note:
AN_119_FTDI_Drivers_Installation_Guide_for_Windows7.pdf.

The application notes and the driver files are contained on the software CD in the Windows folder.

CAN USB-232 User Manual 2-7

Troubleshooting

Once connected to a USB port, the CANUSB will appear as a COM port in the Device Manager. The
CANUSB will always use the lowest available COM port for operation. For instance, if COM ports 1 thru 3
are in use by other peripherals and applications, the CANUSB will use COM 4.

The CANUSB functions identically to a COM port from the reference point of both the host application and
the serial device, and it can support serial device control requests defined in the Microsoft Win32®
Communications API.

The Virtual COM Port (VCP) device drivers allow the CANUSB device to appear to the PC's application
software as an additional COM port (in addition to any existing hardware COM ports). Application software
running on the PC accesses the CANUSB device as it would access a standard hardware COM port.
However, actual data transfer between the PC and the CANUSB device is performed over the USB.
Therefore, existing COM port applications may be used to transfer data via the USB to the CANUSB-based
device without modifying the application.

2.1.2.4 Windows CE 4.2-5.2

The drivers for Windows CE includes the following versions of Windows CE 4.2-5.2 based operating
systems: Windows Mobile 2003, Windows Mobile 2003 SE, Windows Mobile 5, Windows Mobile 6,
Windows Mobile 6.1 ,Windows Mobile 6.5

Please read the application note Windows_CE_Installation_Guide.pdf. The purpose of this document is to
provide users of FTDI chips with a simple procedure for installing drivers for their devices on PDAs and
targets running Windows CE 4.2 and later. The application note and drivers files are contained on the
software CD in the Windows CE 4.2-5.2 folder.

2.1.2.5 Windows CE 6.0

Please read the application note Windows_CE_Installation_Guide.pdf. The purpose of this document is to
provide users of FTDI chips with a simple procedure for installing drivers for their devices on PDAs and
targets running Windows CE 6.0 and later. The application note and drivers files are contained on the
software CD in the Windows CE 6.0 folder.

2.1.3 COM Port Assignment

COMPort_Assignment is a utility which is used for assigning the COM Port numbers of FTDI devices. The
utility is available as a free download from the Utilities page of the FTDI website. Please read the
AN_160_COMPort_Assigment_User_Guide.pdf for installation and operating instructions. The application
note and the Reassign COMNo Utility.zip file are contained on the software CD.

2.1.4 USBView

USBView is a free utility from Microsoft that displays the USB connection tree and shows the USB devices
that are connected to it together with their configuration data. This is very useful for debugging USB
enumeration errors. USBView runs under Windows 98, ME, 2000 and XP.

2-8 CAN USB-232 User Manual

Getting Started

J1

1
2
3
4
5
6
7
8
9
10

TX
CTS

nc
RX
nc
RTS
nc
XCFG PB
GND

+7-24 VDC

DB9-Male DTE

1
2
3
4
5
6
7
8
9

J1

1
2
3
4
5
6
7
8
9
10

TX
CTS

nc
RX
nc
RTS
nc
XCFG PB
GND

+7-24 VDC

DB9-Female DCE

1
2
3
4
5
6
7
8
9

2.2 Hardware Installation

2.2.1 RS232 Serial Cable

The following drawing shows the connection diagram for the DB-9 Male and DB-9 Female cables to the
solder pads on the circuit board at J1.

Pin 9 on the DB-9 connector is shown with +7-24 VDC going to Pin 2 of J1. This an optional method of
supplying power to the device. It is not required if you use a different power source. The factory default
configuration has no internal connection to J1-pin 2. For more details about power, see Power Options on
page 2-10.

The signal on J1-pin 9 is named XCFG PB, which is the External Configuration Push Button input. This
signal is NOT connected to the DB9-Male cable at the factory. If you need the push button input, contact the
sales department to get a quote for a custom cable.

CAN USB-232 User Manual 2-9

Troubleshooting

USB Type A USB-232 J1

1 VBUS (Red)
2 D- (White)
3 D+ (Green)
4 GND (Black)

1 VIN
2 USBM
3 USBP
4 GND

2.2.2 USB Cable Wiring

The following drawing shows the connection diagram for the USB cable to the solder pads on the circuit
board at J1.

2.2.3 Power Options

For the CAN-232 model, power (+7-24 VDC) can be supplied through a Phoenix terminal block (J7),
through a barrel jack (J9), through the serial cable (usually pin 9) to J1-Pin 2, or through the OEM option
connector J10-pin 1. The factory default is the Barrel Jack J9.

The Jumper J8 should be in position 3-2 for Phoenix or barrel jack power. Jumper J8 should be in position
1-2 for serial cable or OEM (J10) supplied power. Factory default setting is a jumper in position 3-2.

2-10 CAN USB-232 User Manual

2.2.4 Item Locator CAN-232

J4

J3

J5

J9

J1

S1

J8

J2

J6

J6

J4

J3

J2

J1

S1

J5

2.2.5 Item Locator CAN-USB

Getting Started

2.2.6 Input Power

The input power range is from 7-24VDC for the CAN-232 model. The 5V regulator U5 supplies power to
the U6, the 3.3V regulator. D8 is the Power LED.

CAN USB-232 User Manual 2-11

Troubleshooting

For the CAN-USB version, power is supplied by the USB connection. D8 is the Power LED.

2.2.7 Isolated Power Option

Both the CAN-USB and CAN-232 can be configured for the Isolation option. Non-isolated units do not
have U3 installed. Jumpers J3 and J4 are used to supply +5 and ground to the output circuits.

For isolation, U3 is installed and jumpers J3 and J4 are removed. U3 is a DC-DC converter that isolates the
two power circuits.

The DC/DC converter is typically used in general purpose power isolation and voltage matching
applications, and feature a full industrial operating temperature range of -40°C to +85°C without derating.
The device is 2kVDC rated in a UL94V-0 package.

Note: The isolated option must be selected at the time the unit is ordered. This is not a field upgrade option.

2.2.8 OEM Options

The OEM version comes without a USB or RS232 cable. It is designed to be part of an embedded product.
Instead of a cable connector, a 10-pin header is used to connect the signals to an OEM circuit board.

The CAN signals are brought out to the OEM connector at J11. The OEM connector is a 10-pin header
soldered to the bottom side of the board.

The RS232 signals are brought out to the OEM connector at J10. Power can be supplied through pin 1 and
Ground is tied to pin 9. J8 must also be jumpered between pins 1 and 2. (See Power Options for J8)

2-12 CAN USB-232 User Manual