What are Dry Contact and Wet Contact and their differences?

What is Dry Contact? Dry contacts are known as voltage-free contacts or potential-free contacts. These contacts don’t provide any power or voltage source from the switch. But power or voltage source is provided from an external source. The contact current for these dry contact is less than one milli-ampere. The power supply must be provided …

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PLC program for a batch process

Introduction Hey guys in this session we are gonna discuss about a PLC program for a batch process.In my earlier posts i mentioned the basics of PLC so you can check that out by clicking the link below so lets discuss about the program   Procedure Automatically injects the container with liquids A and …

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What is DCS?

Introduction Distributed Control System refers to a control system usually of a manufacturing System, process in which the controller elements are not central in location but are distributed throughout the system with each component sub-system controlled by one or more controllers DCS was introduced in 1975 by: »Honeywell-TDC 2000 »Yokogawa – Centum • Today Centum is Having around 14,000 installations around the world. •Advances in centum: CS1000 and CS3000 •Advances …

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Introduction of Siemens PLC

Introduction  Siemens makes several PLC product lines in the SIMATIC S7 family. They are: S7-200, S7-300, and S7-400. Siemens Step 7 is a powerful integrated software solution for automation, and includes the programming environment for Siemens programmable logic controllers (PLCs). This software provides unique and powerful programming tools with multiple benefits including: creation of re-useable logic, …

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