Research Article Open Access

Custom Design of an Analogue Input Digital Output Interface Card for Small Size PLCs

Mohammad A.K. Alia1
  • 1 ,
American Journal of Applied Sciences
Volume 4 No. 7, 2007, 479-483

DOI: https://doi.org/10.3844/ajassp.2007.479.483

Submitted On: 19 March 2007 Published On: 31 July 2007

How to Cite: Alia, M. A. (2007). Custom Design of an Analogue Input Digital Output Interface Card for Small Size PLCs. American Journal of Applied Sciences, 4(7), 479-483. https://doi.org/10.3844/ajassp.2007.479.483

Abstract

This paper describes the design and implementation of an interface card (IC) with analogue input and digital output, designed for use with small size PLCs, which do not support interface features. The absence of generic I/O interface modules due to the differences in PLCs design and software, validates the importance of such work. The IC costs about one third of an analogue I/O dedicated proprietary module. The IC was utilized in a closed loop temperature control system. The results of the work are satisfactory.

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Keywords

  • Interface card
  • PLC program
  • PWM
  • ADC
  • analogue input digital output card