Input circuit for industrial control with low heat dissipation

An industrial control system and circuit technology, applied in general control systems, program control, computer control, etc., can solve problems such as large voltage drop series resistors and dissipation.

Active Publication Date: 2013-12-04
ROCKWELL AUTOMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This step-down series resistor is usually physically large to handle the necessary power dissipation and must be spaced to help dissipate the accompanying heat

Method used

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  • Input circuit for industrial control with low heat dissipation
  • Input circuit for industrial control with low heat dissipation
  • Input circuit for industrial control with low heat dissipation

Examples

Experimental program
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Embodiment Construction

[0024] now refer to figure 1 and 2 , the I / O block 10 may provide a unit housing 12 having a plurality of openings 14 for positioning and supporting a removable or permanently installed I / O module 16 . I / O modules 16 typically provide an electrical interface between an industrial controller 17 and an industrial process or machine 18 having actuators presenting a load 20 powered by an external field-side power supply 22 that can is the DC source or AC source (as shown) to be described. Each of the I / O modules 16 may have exposed screw terminals 24 for connecting the circuitry of the I / O module 16 to a field-side power source 22 of the industrial process or machine 18 via electrical conductors 26 .

[0025] The housing 12 of the I / O block 10 may be supported, for example, on a DIN rail 29 of the type known in the art, or the housing 12 of the I / O block 10 may provide another mounting arrangement that allows it to be located near the desired controlled load 20 . The I / O block...

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PUM

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Abstract

An I / O circuit for use with an industrial controller provides an input circuit with low power dissipation through the use of a series connected substantially nonresistance impedance. An AC waveform input (60) activates a light emitting diode (LED) bridge (70) to provide an optical signal (84) which illuminates a photosensitive solid-state switch (86) thereby providing optical isolation (83) between the industrial controller and the controlled process or machine. By using a series connected substantially nonresistance impedance (64), reduced current demand by the input circuit may be realized, which allows reduced power dissipation. As a result, the same circuit allows receiving input signals over a greater range, such as 120 volts AC and 240 volts AC, and allows significantly smaller components with closer spacing for a more compact design.

Description

technical field [0001] The present invention relates to an I / O module for an industrial control system, in particular to a low heat dissipation I / O module that can flexibly supply an input AC waveform within the range of AC voltage. Background technique [0002] Industrial controllers are special-purpose computer systems used for the control of industrial processes or machinery, such as in a factory environment. Industrial controllers differ from traditional computers in many ways. Physically, they are constructed to be substantially stronger to withstand shock and damage and better resist external contamination and extreme environmental conditions. The processor and operating system are optimized for real-time control and execute a language that allows rapid customization of programs to suit a variety of controller applications. Typically, the controller has a highly modular architecture that allows different numbers and types of input and output modules for connecting th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B19/042
CPCH03K5/1536H03K5/08
Inventor 约翰·奥康奈尔达勒·特尔丹
Owner ROCKWELL AUTOMATION TECH
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