6.6 Programmable Logic Controllers (PLC)
Before the advent of solid-state logic circuits, logical control systems were designed and built exclusively around...
Tag: digital logic
6.5 Fail-safe Design
Logic circuits, whether comprised of electromechanical relays or solid-state gates, can be built in many different ways...
6.4 Motor Control Circuits
The interlock contacts installed in the previous section’s motor control circuit work fine, but the motor will run...
6.3 Permissive and Interlock Circuits
A practical application of switch and relay logic is in control systems where several process conditions have to be met...
6.2 Digital Logic Functions
We can construct simple logic functions for our hypothetical lamp circuit, using multiple contacts, and document these...
6.1 Ladder Diagrams
Ladder diagrams are specialized schematics commonly used to document industrial control logic systems. They are called...
