Engineering Expert Witness Blog

Industrial Control Basics – Unlatching the Latching Circuit

Sun, 05 Feb 2012 22:38:27 +0000

In this state the coil and steel core are no longer magnetized, causing them to release their grip on the steel armatures and the spring to pull them back until one of them makes contact with the N.C. contact.

Industrial Control Basics – Latching Circuit

Sun, 29 Jan 2012 22:50:24 +0000

When in the latched state, the magnetic attraction maintained by the wire coil and steel core won’t allow the relay armature to release from the N.O. contact.

Industrial Control Basics – Electric Relay Ladder Diagram

Sun, 22 Jan 2012 22:08:33 +0000

In industrial control terminology the electric relays shown in ladder diagrams are often called “control relays,” denoted as CR.

Industrial Control Basics – Electric Relay Example

Sat, 14 Jan 2012 21:01:29 +0000

Now let’s see what happens when we put a relay to use within a basic industrial control system making use of lit bulbs.

Industrial Control Basics – Electric Relay Operation

Mon, 09 Jan 2012 19:36:06 +0000

We can see that the main task of an electric relay is to switch current between two possible paths within a circuit, thereby directing its flow to one or the other.

Industrial Control Basics – Introduction to Electric Relays

Tue, 03 Jan 2012 15:50:31 +0000

Little did I know then that the electromagnet I had created was similar to an important part found within electrical relays used in many industrial control systems.

Industrial Control Basics – Pushbuttons

Mon, 26 Dec 2011 17:01:25 +0000

Pushbuttons, although simple in appearance like the big, red “Easy” button that’s featured in a certain business supply chain’s commercials, are actually complex behind the scenes.

Industrial Control Basics – Ladder Diagrams

Mon, 19 Dec 2011 01:13:13 +0000

Diagrams such as the one in Figure l are often referred to as “ladder diagrams.”

Industrial Control Basics – Manual Control

Mon, 12 Dec 2011 23:03:58 +0000

It’s simple to operate, but it does have one major flaw. It requires constant monitoring by a human.

Industrial Control Basics

Sun, 04 Dec 2011 17:31:30 +0000

Industrial control systems can be broken down into two basic categories, manual controls and automatic controls.

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