Omega Engineering USB-4761, User Manual, Page: 7 / 39

Chapter 1 Introduction
Thank you for buying the USB-4761 data acquisition module. The USB-
4761 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.
1.1 Features
USB-4761 has the most requested measurement & control functions:
• 8 relay output (Form C) and 8 isolated digital input channels
• LED indicators to show activated relays
• High-voltage isolation on input channels (2,500 VDC)
• High ESD protection (2,000 VDC)
• Wide input range (5 ~ 30 VDC)
• Interrupt handling capability
• Bus-powered
• Wiring terminal on Modules
Note: You can install up to sixteen USB-4761’s to a
system because of the restriction of device
BoardID
Note: The power output of an USB port is 500 mA,
while the USB-4761 requires 400mA (Max.). This
means that if an USB hub is used, it will need an
external power supply to support more than one
USB-4761 device.
USB-4761 User Manual 2