Inputs and Outputs

Learning objectives

  • List some types of discrete I/O (input/output) interfaces
  • Describe AC/DC and DC/AC conversion in I/O modules
  • Discuss DC sinking and sourcing
  • Describe the use of transistor - transistor logic (TTL)
  • Discuss register/BCD modules and multiplexing
  • List some types of analog input devices
  • Describe the use of A/D and D/A converters
  • Identify the functions of transducers in input field devices
  • Discuss single-ended and differential configurations

Course overview

As discussed in the previous course, discrete I/O (input/output) interfaces are the physical connection between the CPU and the physical field equipment. Analog modules translate continuous analog signals into discrete values. The rack enclosures contain the PLC (programmable logic controller) I/O modules. Each modules is identified by a unique address specifying its rack location.

The Inputs and Outputs training course builds on the understanding of I/O operations equipment and PLC program operation from the previous course. It describes the design and function of I/O interfaces. It also discusses the equipment used to produce and communicate I/O data. This online course includes:

  • Discrete I/O
  • Analog I/O
  • Special I/O and serial communication interfaces
  • Signal conditioning

Inputs and Outputs is part of the Programmable Logic Controllers training series.

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