What is an Interlock? | Different Types of Interlocks - AutomationForum
Aug 28, 2021 · What is an electrical equipment interlock and why interlock is required? The electrical interlocking is done to make sure that the equipment is safe, the electrical interlock is mostly used for …
Understanding Permissive Logic and Trip Interlocks in Industrial Systems
Jun 10, 2025 · Explore how permissive logic and trip interlocks ensure safe equipment operation in DCS, PLC, and SIS-based automation systems.
what is an interlock? | Automation & Control Engineering Forum
Nov 27, 2002 · An interlock is a condition or series of conditions that must be met to allow an operation or process to continue. Examples are numerous, but some general examples include: shield interlock …
Interlock test procedures | Automation & Control Engineering Forum
Apr 28, 2004 · I am looking at developing a standard methodology for developing interlock test procedures for safety critical systems for where I work. We have a number of systems that use …
Step-by-Step PLC Ladder Logic for Automatic Liquid
Jul 2, 2025 · Design a semi-automatic PLC liquid mixing system using Schneider EcoStruxure, with interlocks, ladder logic, and agitator control automation.
What is a control narrative, what is its purpose, and
Jan 24, 2023 · What is the control narrative? A system control philosophy is a document that contains a description of the operating philosophies prepared by process engineers.
process interlock and safety interlock?? the difference?
Jun 16, 2012 · I want to understand the difference between process interlock and safety interlock. as i came to know that process interlock is configured in dcs, while the safety interlock at Plant shuddown …
Cause and Effect Drawing in process instrumentation
Jan 30, 2023 · Causes can include a change in the state of a digital input, a High High/Low Low alarm from an analogue input, and interlock logic, among other things. Effects can include tripping a motor …
Understanding Fail-Safe Logic in Industrial Automation Systems
Jun 26, 2025 · Learn fail-safe circuit design using NC logic for safe shutdowns in motors, valves, and interlocks during power or signal failure.
PLC Program for Motor Starter with Low-Level Switch Interlock
Jul 31, 2025 · Learn how to build a PLC-based motor starter with a low-level switch interlock to protect pumps from dry run. Includes ladder logic, wiring, and working principle.