Log In

Celebrating 45 Years

Follow us on Facebook for all the latest news, updates and promotions

 

Credit Cards Accepted

 

Aurora Probability in Northern Canada

Auroral forecast from AuroraWatch.ca

 

North America Aurora Map from
NOAA Space Weather Prediction Center

Aurora Map - NOAA

 

 

PCL-724

 
pcl-724 image

24-bit Digital I/O Card   


 

Introduction
Applications
Features
Specifications
Ordering Information

Introduction

Return to top of page

The PCL-724 offers 24 programmable digital I/O lines on a half-size PC add-on card. Each port emulates the operation of an 8255 Programmable Peripheral Interface (PPI) chip in mode 0 but provides a higher driving capacity than the 8255.

The PCL-724's 24 bits of DI/O are divided into three 8-bit ports (A, B and C). You can configure each of these ports individually by software for either input or output. The card can directly control SSR carrier modules through a 50-pin Opto-22 compatible connector.

The PCL-724 is a low-cost alternative to the PCL-722 for applications that require up to 24 I/O channels. Like the PCL-722 it provides a readback feature which lets you monitor the status of the output by reading back the output port directly.

Applications

 

 

  • Digital I/O control
  • Industrial monitoring and control
  • Interfacing with parallel I/O devices
  • Interfacing with Opto-22 compatible I/O module racks

Features

 

 

  • 24 digital I/O lines
  • Emulates 8255 PPI mode 0
  • Buffered circuits for higher driving capacity than the 8255
  • Interrupt handling
  • Output status readback
  • Pin-compatible with Opto-22 I/O module racks

Specifications

 

 

  • I/O lines: 24 (8 bits x 3 ports)
  • Programming mode: 8255 PPI mode 0
  • Interrupt: Bit 0 of port C can generate an interrupt to IRQ2, 3,4,5,6 or 7
  • Interrupt triggering: Rising or falling edge triggering, jumper-selectable
  • Digital output:
    Logic level 0: 0.5 V max. @ 24 mA (sink)
    Logic level 1:2.0 V min. @ 15 mA (source)
  • Digital Input:
    Logic level 0: 0.8 V max.
    Logic level 1: 2.0 V min.
  • Transfer rate:
    300 Kbytes/sec typical
    500 Kbytes/sec max.
  • Connectors: 50-pin male ribbon-cable connectors. Pin assignments are fully compatible with Opto-22 I/O module racks
  • Dimensions: 4.9" (L) x3.9" (H) (125 mm x 100 mm)
  • Power consumption:
    5 V @ 0.5 A typical
    5 V @ 0.8 A max.

Ordering Information

 

 

PCL-724

24-bit Digital I/O Card, utility disk and user's manual
PCLD-782B

24/16-channel Opto-isolated Digital input Board
PCLD-785B

24/16-channel Relay Output Board
PCLS-DLL-DIO $FREE

Window 3.1 DLL Driver
Return to top of pageReturn to top of pageReturn to top of pageReturn to top of page
 
 
 
USA Office

Tel:1.877.902.2979-1.425.223.4311
Fax:1.877.329.4324
Address: 1480 Gulf Road, Suite 837,
PO Box 1364
Point Roberts, WA 98281

Western Canada - Vancouver BC

Tel:1.800.663.6001 or 1.604.925.6150
Fax:1.604.925.6170
Address: 2454 Haywood Ave
West Vancouver, BC V7V 1Y1

Eastern Canada - Markham, Ontario

Tel:1.800.465.0164 or 1.905.513.7027
Fax:1.877.329.4324