Timing Relay vs PLC Timer: When to Use Each
A senior-engineer comparison of hardwired timing relays and PLC software timers, covering accuracy, fail-safe independence, panel cost and when to use each.
Relay vs Optocoupler for PLC Interfacing
A field-grounded comparison of electromechanical relays and optocoupler-based interfaces for PLC outputs, covering isolation mechanism, switching speed, leak...
How to Select an Interface Relay for PLC Outputs
A step-by-step guide to matching PLC output type, coil voltage and current, contact rating, and socket style when selecting an interface relay.
PLC Interface Relays: Isolating and Amplifying I/O
How PLC interface relays isolate low-power control I/O from field-side faults and amplify a milliamp signal into a load-level contact.
Main Components of a PLC System: Complete Guide for Engineers
Master PLC system components: CPU, power supply, I/O modules, communication interfaces, and software with sizing formulas and selection tips. Shop at Stoklink.
Main Types of Programmable Logic Controllers: A Complete PLC Guide
Compare the 5 main PLC types, IEC 61131-3 languages, scan-time sizing, and brand options to choose the right controller for your plant. Shop at Stoklink.
What Is a Programmable Logic Controller and How Does It Work
Learn how a PLC works, including scan cycle, I/O sizing, IEC 61131-3 programming, and hardware selection for ABB, Schneider, and Siemens. Shop at Stoklink.
Programmable Logic Controller Guide: Selection, Application, and Maintenance for Engineers
PLC selection guide for engineers covering IEC 61131 compliance, Siemens, Rockwell, Schneider, ABB comparison, scan time sizing, and wiring. Shop at Stoklink.
