B&B Electronics USB-4751/4751L user manual Hardware Features

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.

USB-4751/4751L User Manual 2