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24-channel Digital I/O ISA Board, supports operating temperatures from 0 ~ 60 °C.


24-channel Digital I/O ISA Board, supports operating temperatures from 0 ~ 60 °C.

  Price:  $109.00  

Fastest Delivery: (Details) X Delivery Details
We ship via UPS and fastest delivery is with Next Day Air. UPS Next Day Air Early typically gets their product to them as early as 8am, Next Day Air gets their product typically there by 10:30am and Next Day Air Saver typically by 3pm. We ship same day for in stock items and the lead time is up to one week for out of stock items. Delivery is dependent on UPS and your shipping method.


The DIO-24 provides 24 TTL digital I/O lines. The DIO-24 emulates 8255 mode 0 and has an increased output current of 15 mA (source) and 64 mA (sink) , allowing it to control LED, relay, etc. The DIO-24 consists of three 8 bit bi-directional ports and 2 input lines for interrupt enable and interrupt. The 8 bit ports are named port A(PA),port B(PB) and port C(PC). The port C can be split into two four bit. All ports are configured as inputs upon power-up or reset. The DIO-24 uses 4 consecutive I/O locations in I/O addressing space. The base address is selectable from 200 to 3FF hex. The interrupt signal can be connected to any of the interrupt levels 2 through 7.


  • 24 digital I/O lines
  • Emulate 8255 mode 0 (Basic Input / Output mode)
  • Buffer output for higher driving capability than 8255
  • Register compatible to 724 series
  • Programmable interrupt handling
  • Output status readback


  • Factory automation
  • Product test
  • Test automation
  • Digital I/O control
  • Alarm monitoring
  • 4-channel SSR Output Daughter Board




  • DOS sample program(with source codes)
  • DLL and OCX SDK for Windows 98/NT/2000
  • DLL and OCX SDK for 32-bit Windows XP/2003/Vista/7
  • VB/VC/Delphi/BCB sample programs with source codes are included
  • LabVIEW toolkit for Windows
  • Driver for Linux and DasyLab


Digital Input
Channels 24 (OPTO-22 compatible)
Compatibility 5 V/TTL
Input Voltage Logic 0: 0.8 V max.
Logic 1: 2.0 V min.
Response Speed 1.0 MHz (Typical)
Digital Output
Channels 24 (OPTO-22 compatible)
Compatibility 5 V/TTL
Output Voltage Logic 0: 0.4 V max.
Logic 1: 2.4 V min.
Output Capability Sink: 0.8 mA @ 0.8 V
Source: -2.4 mA @ 2.0 V
Response Speed 1.0 MHz (Typical)
Bus Type ISA
I/O Connector 20-pin box header x 2
50-pin box header x 1
Dimensions (L x W x D) 182 mm x 110 mm x 22 mm
Power Consumption 900 mA @ +5 V
Operating Temperature 0 ~ 60 °C
Storage Temperature -20 ~ 70 °C
Humidity 5 ~ 85% RH, non-condensing

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