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Thomas Supplier



pcl-731 image

48-bit Digital I/O Card


Ordering Information


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The PCL-731 offers 48 programmable digital I/O lines, respectively. 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 DI/O ports are combined into six 8-bit ports. You can configure each port individually by software for either input or output. The card can directly interface to SSR module carrier boards through a 50-pin Opto-22 compatible connector. The PCL-731 is a low-cost alternative to the PCL-722. Like the PCL-722 they provide a readback feature which lets you monitor the status of the output by reading back the output port directly.




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




  • 48 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




  • I/O lines: 48
  • Programming mode: 8255 PPI mode 0
  • Interrupt: Bit 0 of one port can generate an interrupt to IRQ 2~15
  • Interrupt triggering: Rising or falling edge triggering, jumper-selectable
  • Digital output:
    Logic 0: 0.5 V max. @ 24 mA (sink)
    Logic 1: 2.0 V min. @ 15 mA (source)
  • Digital input:
    Logic 0: 0.8 V max.
    Logic 1: 2.0 V min.
  • Connectors: 50-pin male ribbon-cable connectors
  • Dimensions: 7.3" (L) x 3.9" (H) (185 mm x 100 mm)
  • Power consumption:
    5 V @ 0.5 A typical
    5 V @ 0.8 A max.

Ordering Information




48-Channel Programmable Digital I/O Card (50 pin)

24-Channel Opto-Isolated Digital Input Board (50 20 pin)

24-Channel Relay Output Board (50 20 pin)

16-Channel Power Relay Output Board (50 20 pin)

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