Advantech USB-4750 User manual

User Manual
USB-4750
32-Channel Isolated Digital I/O
USB Module

USB-4750 User Manual ii
Copyright
The documentation and the software included with this product are copyrighted 2022
by Advantech Co., Ltd. All rights are reserved. Advantech Co., Ltd. reserves the right
to make improvements in the products described in this manual at any time without
notice. No part of this manual may be reproduced, copied, translated, or transmitted
in any form or by any means without the prior written permission of Advantech Co.,
Ltd. The information provided in this manual is intended to be accurate and reliable.
However, Advantech Co., Ltd. assumes no responsibility for its use, nor for any
infringements of the rights of third parties that may result from its use.
Acknowledgments
Intel and Pentium are trademarks of Intel Corporation.
Microsoft Windows and MS-DOS are registered trademarks of Microsoft Corp.
All other product names or trademarks are properties of their respective owners.
Product Warranty (2 years)
Advantech warrants the original purchaser that each of its products will be free from
defects in materials and workmanship for two years from the date of purchase.
This warranty does not apply to any products that have been repaired or altered by
persons other than repair personnel authorized by Advantech, or products that have
been subject to misuse, abuse, accident, or improper installation. Advantech
assumes no liability under the terms of this warranty as a consequence of such
events.
Because of Advantech’s high quality-control standards and rigorous testing, most
customers never need to use our repair service. If an Advantech product is defective,
it will be repaired or replaced free of charge during the warranty period. For out-of-
warranty repairs, customers will be billed according to the cost of replacement mate-
rials, service time, and freight. Please consult your dealer for more details.
If you believe your product to be defective, follow the steps outlined below.
1. Collect all the information about the problem encountered. (For example, CPU
speed, Advantech products used, other hardware and software used, etc.) Note
anything abnormal and list any onscreen messages displayed when the prob-
lem occurs.
2. Call your dealer and describe the problem. Please have your manual, product,
and any helpful information readily available.
3. If your product is diagnosed as defective, obtain a return merchandise authori-
zation (RMA) number from your dealer. This allows us to process your return
more quickly.
4. Carefully pack the defective product, a completed Repair and Replacement
Order Card, and a proof of purchase date (such as a photocopy of your sales
receipt) into a shippable container. Products returned without a proof of pur-
chase date are not eligible for warranty service.
5. Write the RMA number clearly on the outside of the package and ship the pack-
age prepaid to your dealer.
Part No. 2003475002 Edition 3
Printed in Taiwan September 2022

iii USB-4750 User Manual
Declaration of Conformity
CE
This product has passed the CE test for environmental specifications when shielded
cables are used for external wiring. We recommend the use of shielded cables. This
type of cable is available from Advantech. Please contact your local supplier for
ordering information.
Test conditions for passing also include the equipment being operated within an
industrial enclosure. In order to protect the product from damage caused by electro-
static discharge (ESD) and EMI leakage, we strongly recommend the use of CE-
compliant industrial enclosure products.
Technical Support and Assistance
1. Visit the Advantech website at www.advantech.com/support to obtain the latest
product information.
2. Contact your distributor, sales representative, or Advantech's customer service
center for technical support if you need additional assistance. Please have the
following information ready before calling:
–Product name and serial number
–Description of your peripheral attachments
–Description of your software (operating system, version, application software,
etc.)
–A complete description of the problem
–The exact wording of any error messages
Document Feedback
To assist us with improving this manual, we welcome all comments and constructive
criticism. Please send all feedback in writing to [email protected].
Safety Precautions - Static Electricity
Follow these simple precautions to protect yourself from harm and the products from
damage.
To avoid electrical shock, always disconnect the power from the PC chassis
before manual handling. Do not touch any components on the CPU card or
other cards while the PC is powered on.
Disconnect the power before making any configuration changes. A sudden rush
of power after connecting a jumper or installing a card may damage sensitive
electronic components.

USB-4750 User Manual iv

v USB-4750 User Manual
Contents
Chapter 1 Introduction..........................................1
1.1 Introduction ............................................................................................... 2
1.2 Hardware Features ................................................................................... 2
1.3 Software Overview.................................................................................... 2
Chapter 2 Installation............................................3
2.1 Unpacking ................................................................................................. 4
2.2 Driver Installation ...................................................................................... 5
Figure 2.1 XNavi Installer ............................................................ 5
2.2.1 Software Development Using DAQNavi SDK ............................... 5
2.3 Hardware Installation ................................................................................ 6
2.4 Hardware Uninstallation............................................................................ 7
Figure 2.2 Uninstalling USB-4750 ............................................... 7
Chapter 3 Signal Connections .............................9
3.1 Overview ................................................................................................. 10
3.2 I/O Connectors........................................................................................ 10
3.2.1 Pin Assignments ......................................................................... 10
Figure 3.1 I/O Connector Pin Assignment ................................. 10
3.2.2 I/O Connector Signal Description................................................ 11
Table 3.1: I/O Connector Signal Descriptions ........................... 11
3.2.3 LED Indicator Status Description ................................................ 11
Table 3.2: LED Indicator Status Description.............................. 11
3.3 Isolated Digital I/O Connections.............................................................. 12
3.3.1 Dry/Wet Contact Support for Digital Input................................... 12
Figure 3.2 Isolated Digital Input Connections ............................ 12
3.3.2 Isolated Digital Output Connections............................................ 12
Figure 3.3 Isolated Digital Output Connections ......................... 13
3.4 Field Wiring Considerations .................................................................... 13
Appendix A Specifications ....................................15
A.1 Isolated Digital Input................................................................................ 16
A.2 Isolated Digital Output............................................................................. 16
A.3 Optically-Isolated Counter....................................................................... 16
A.4 General ................................................................................................... 16

USB-4750 User Manual vi

Chapter 1
1Introduction
Sections include:
Introduction
Features
Specifications

USB-4750 User Manual 2
1.1 Introduction
Thank you for buying the Advantech’s USB-4750 data acquisition module. The
Advantech USB-4750 is a powerful data acquisition (DAS) module for the USB port.
It features a unique circuit design and complete functions for data acquisition and
control.
1.2 Hardware Features
USB-4750 features excellent measurement & control functions:
32 isolated digital input/output channels
High-voltage isolation up to 2,500 VDC on all channels
Dry/wet contact support
Interrupt handling capability
High-sink current for isolated output channels (200mA max./Channel)
Digital output value retained after hot system reset
Programmable Power-Up States for output channels
Wiring terminals on module
Compatible with USB 1.1/2.0 (Supports USB 1.1 data transfer rate)
Bus powered
1.3 Software Overview
Advantech offers device drivers, SDKs, third-party driver support and application
software to help fully exploit the functions of your DAQ devices. All these software
packages are available on Advantech website: http://www.advantech.com/.
The Advantech Navigator is a utility that allows you to set up, configure and test your
device, and later stores your settings in a proprietary database.
1. To set up the I/O device for your card, you could first run the Advantech Naviga-
tor program (by accessing Start/Programs/Advantech Automation/DAQNavi/
Advantech Navigator). The settings could also be saved to XML file, that can be
loaded in the applications using LoadProfile API.
2. You can then view the device(s) already installed on your system (if any) on the
Installed Device tree view. If the software and hardware installation are com-
pleted, you will see the device in the Installed Devices list.
Note! You can install up to sixteen USB-4750's to a system because of the
maximum number limit of the device BoardID.
Note! The power output of an USB port is 500 mA, while the USB-4750
requires 350 mA (Max.). This means that if an USB hub is used, it will
need an external power supply to support more than one USB-4750
device.
Note! For detailed specifications of USB-4750, please refer to Appendix A,
Specifications.

Chapter 2
2Installation
Sections include:
Unpacking
Driver Installation
Hardware Installation
Hardware Uninstallation

USB-4750 User Manual 4
2.1 Unpacking
After receiving your USB-4750 package, please inspect its contents first. The pack-
age should contain the following items:
USB-4750 Module
Shielded USB 2.0 Cable (1.72 m)
User Manual
The USB-4750 Module harbors certain electronic components vulnerable to electro-
static discharge (ESD). ESD could easily damage the integrated circuits and certain
components if preventive measures are not carefully paid attention to. Before remov-
ing the module from the anti-static plastic bag, you should take following precautions
to ward off possible ESD damage:
Touch the metal part of your computer chassis with your hand to discharge static
electricity accumulated on your body. One can also use a grounding strap.
Make contact between the anti-static bag and ground before opening.
After taking out the module, you should first:
Inspect the module for any possible signs of external damage (loose or damaged
components, etc.). If the module is visibly damaged, please notify our service depart-
ment or our local sales representative immediately. Avoid using a damaged module
with your system.
Avoid physical contact with materials that could hold static electricity such as
plastic, vinyl and Styrofoam.

5 USB-4750 User Manual
Chapter 2 Installation
2.2 Driver Installation
The driver package could be found on Advantech Support Portal (https://www.advan-
tech.com/support). Search for USB-4750 on the support portal, then the corre-
sponded driver/SDK package could be found. You’ll get the XNavi installer after the
download session finishes.
Execute the installer, then it will guide you through the session. You can choose the
device and software components you’d like to install in the system (Figure 2.1). After
the selection, click on “start” to begin the installation.
Figure 2.1 XNavi Installer
2.2.1 Software Development Using DAQNavi SDK
DAQNavi SDK is the software development kit for programming applications with
Advantech DAQ products. The necessary runtime DLL, header files, software man-
ual and tutorial videos could be installed via XNavi installer. They could be found
under C:\Advantech\DAQNavi (default directory) after the finishing the installation.

USB-4750 User Manual 6
2.3 Hardware Installation
After the driver installation is completed, you can now go on to install the USB-4750
module in any USB port that supports the USB 1.1/2.0 standard, on your computer. It
is suggested that you refer to the computer’s user manual if you have any doubts.
Please follow the steps below to install the module on your system.
1. Touch the metal part on the surface of your computer to neutralize the static
electricity that might be in your body.
2. Plug your USB module into the selected USB port. Use of excessive force must
be avoided; otherwise the module might get damaged.
Note! Make sure you have installed the software driver before you install the
module (please refer to Section 2.2 Driver Installation).
Note! In case you installed the module without installing the driver first, operat-
ing systems will recognize your module as an “unknown device” after
reboot, and will prompt you to provide necessary driver. You should
ignore the prompting messages (just click the Cancel button) and set up
the driver according to the steps described in Section 2.2 Driver Installa-
tion.

7 USB-4750 User Manual
Chapter 2 Installation
2.4 Hardware Uninstallation
Though the Advantech USB modules are hot swappable, we still recommend you to
follow the hardware un-installation procedure to avoid any unpredictable damage to
your device or your system.
1. Close the applications of the USB module.
2. Open the Windows Device Manager and right click on the Advantech USB4750
Device”. Then select the “Uninstall” to remove the USB-4750.
Figure 2.2 Uninstalling USB-4750
3. Unplug your USB device from the USB port.
Note! Please make sure that you have closed the application before unplug-
ging the USB device, otherwise unexpected system error or damage
may occur.

USB-4750 User Manual 8

Chapter 3
3Signal Connections
Sections include:
Overview
Isolated Digital I/O Connections
Field Wiring Considerations

USB-4750 User Manual 10
3.1 Overview
Maintaining good signal connections is one of the most important factors in ensuring
that your application system is sending and receiving data correctly. A good signal
connection can avoid unnecessary and costly damage to your PC and other hard-
ware devices.
3.2 I/O Connectors
USB-4750 is equipped with plug-in screw-terminal connectors that facilitate connec-
tion to the module without terminal boards or cables.
3.2.1 Pin Assignments
Figure 3.1 I/O Connector Pin Assignment
Note! IDI0 shares the same pin with INT0.
IDI4 shares the same pin with INT0_G.
IDI7 shares the same pin with CNT0.
IDI8 shares the same pin with INT1.
IDI12 shares the same pin with INT1_G.
IDI15 shares the same pin with CNT1.

11 USB-4750 User Manual
Chapter 3 Signal Connections
3.2.2 I/O Connector Signal Description
3.2.3 LED Indicator Status Description
The USB Module is equipped with a LED indicator to show the current status of the
device. When you plug the USB device into the USB port, the LED indicator will blink
five times and then stay lit to indicate that it is on. Please refer to the following table
for detailed LED indicator status information.
Table 3.1: I/O Connector Signal Descriptions
Signal Reference Direction Description
IDI<0~15> GND Input Isolated digital input channels
INT<0,1> INT_G Input Interrupt trigger sources.
INT<0,1>_G - - Gate for Interrupt pins.
CNT<0,1> GND Input Isolated input counters
IDO<0~15> GND Output Isolated digital output channels
COM<0,1> - - Common pins for connecting inductive
loads of isolated output channels
GND - - Ground
Table 3.2: LED Indicator Status Description
LED Status Description
ON Device ready for work
Off Device not ready to work
Slow Blinking (5 times) Device Initialization
Fast Blinking (Depends on data transfer speed) Device working

USB-4750 User Manual 12
3.3 Isolated Digital I/O Connections
3.3.1 Dry/Wet Contact Support for Digital Input
Each digital input channel accepts either dry contact or 0 ~ 60 VDC wet contact
inputs. Dry contact capability allows the channel to respond to changes in external
circuitry (e.g., the closing of a switch in the external circuitry) when no voltage is pres-
ent in the external circuit. Figure 3.2 shows external circuitry with both wet and dry
contact components, connected as an input source to one of the card's digital input
channels.
Figure 3.2 Isolated Digital Input Connections
3.3.2 Isolated Digital Output Connections
Each of the 8 isolated digital output channels comes equipped with a Darlington tran-
sistor. Every 8 output channels share common collectors and integral suppression
diodes for inductive loads. Channels 0 ~ 7 use COM0, and channels 8 ~ 15 use
COM1 as a common pin. If an external voltage (5 ~ 40 V) is applied to an isolated
output channel (IDO 0 ~ IDO 15) while it is being used as an output channel, the cur-
rent will flow from the external voltage source to the card. Please take care that the
current through each GND pin not exceed 200 mA.
Figure 3.3 shows how to connect an external output load to the card's isolated out-
puts.
Note! External 5kΩ resistor is suggested to be added in wet contact context, to
maintain the voltage level while the external signal source is set to OFF
state.

13 USB-4750 User Manual
Chapter 3 Signal Connections
Figure 3.3 Isolated Digital Output Connections
3.4 Field Wiring Considerations
When you use USB-4750 to acquire data from outside, noises in the environ-
ment might significantly affect the accuracy of your measurements if due cau-
tions are not taken. The following measures will be helpful to reduce possible
interference running signal wires between signal sources and the USB-4750.
The signal cables must be kept away from strong electromagnetic sources such
as power lines, large electric motors, circuit breakers or welding machines,
since they may cause strong electromagnetic interference. Keep the analog sig-
nal cables away from any video monitor, since it can significantly affect a data
acquisition system.
If the cable travels through an area with significant electromagnetic interference,
you should adopt individually shielded, twisted-pair wires as the analog input
cable. This type of cable has its signal wires twisted together and shielded with
a metal mesh. The metal mesh should only be connected to one point at the sig-
nal source ground.
Avoid running the signal cables through any conduit that might have power lines
in it.
If you have to place your signal cable parallel to a power line that has a high
voltage or high current running through it, try to keep a safe distance between
them. Or place the signal cable in a right angle to the power line to minimize the
undesirable effect.

USB-4750 User Manual 14