Advantech USB-4751/4751L - Manual (Page 8)

USB-4751/4751L User Manual 2
Chapter 1 Introduction
Thank you for buying the Advantech’s USB-4751/4751L data acquisition
module. The Advantech USB-4751/4751L 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 Hardware Features
USB-4751/4751L features excellent measurement & control functions:
• 48/24 TTL digital I/O lines
• 50-pin Opto-22 compatible box header
• Emulates mode 0 of 8255 PPI
• Buffered circuits for higher driving capacity than 8255
• Interrupt handling
• Timer/ Counter interrupt capability
• Supports both dry and wet contact
• 50-pin Opto-22 compatible box header
• Compatible with USB 1.1/2.0
• Bus-powered
Note: You can install up to sixteen USB-4751/4751L’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-4751/4751L requires 500mA
(Max.). This means that if an USB hub is used, it
will need an external power supply to support
more than one USB-4751/4751L device.
Note: For detailed specifications of USB-4751/4751L,
please refer to Appendix A, Specifications.