48/24-Channel TTL Digital I/O USB Data Acquisition Modules

USB-4751 and USB-4751L

48/24-Channel TTL Digital I/O USB Data Acquisition Modules | USB-4751 and USB-4751L

48/24-Channel TTL Digital I/O USB Data Acquisition Modules

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  • Compatible with USB 1.1/2.0
  • Portable
  • Bus-Powered
  • 48/24 TTL Digital I/O Lines
  • 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
  • Suitable for DIN-Rail Mounting
  • Lockable USB Cable for Rigid Connection


The USB-4700 series consists of true Plug & Play data acquisition devices. No more opening up your computer chassis to install boardsjust plug in the module, then get the data.

It’s easy and efficient. Models USB-4751 (48-bit) and USB-4751L (24-bit) are digital I/O data acquisition modules for the USB bus. The 48/24 bits are divided into six/three 8-bit I/O ports, and users can configure each port as input or output via software. The USB-4751 and USB-4751L also provide one event counter and three 16-bit timers, which can be cascaded to become a 32-bit timer.

Data collection is simple. Simply plug the data acquisition module into an available USB port and our easy-to-use Windows software does the rest. The software converts your PC into a real-time strip chart recorder. Data can be printed in graphical or tabular format. It can also be exported to a text or Microsoft Excel file.


USB-4751: 48
USB-4751L: 24 (shared with output)
Compatibility: 5V/TTL
Input Voltage:
Logic 0: 0.8V max
Logic 1: 2V min


USB-4751: 48
USB-4751L: 24 (shared with input)
Compatibility: 5V/TTL
Output Voltage:
Logic 0: 0.4 V min
Logic 1: 2.4 V min
Output Capability:
Sink: 0.4V @ 8 mA
Source: 2.4V @ 4 mA

Resolution: 2 x 16-bit counters, or 1 x 32-bit counter; 1 x 16-bit event counter
Compatibility: 5 V/TTL
Max Input Frequency: 10 MHz

Bus Type:
USB 1.1/2.0
Software: Windows 2000/XP
I/O Connectors: 50-pin IDC male connectors,
pin assignments are fully compatible with Opto-22 I/O module racks
132 L x 80 W x 32 mm H
(5.2 x 3.1 x 1.3")
Power Consumption: 5 V @ 200 mA typical; 5V @ 300 mA max
Operating Temperature: 0 to 60° C (32 to 140° F)
Storing Temperature: -20 to 70° C (-4 to 158° F)
Storing Humidity: 5 to 95% RH, non-condensing
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