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.
14 min read
Technical
Industrial automation guides
Guides and notes on industrial electrical and automation parts: selection, wiring, settings and ordering.
- Articles
- 37
- Latest
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.
13 min read
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.
12 min read
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.
24 min read
Contactor Price List: ABB, Schneider, Siemens, Eaton Compared
Compare 2025 pricing on ABB, Schneider, Siemens, and Eaton contactors across all frame sizes with sizing tools and TCO insights for engineers. Shop at Stoklink.
10 min read
How to Check Contactor Stock Availability and Lead Times from Distributors
Verify contactors stock and lead times from distributors with proven RFQ tactics, scorecards, and reorder point formulas for procurement. Shop at Stoklink.
11 min read
Why Does My Contactor Weld or Fail to Open Under Load? Causes and Fixes
Prevent arc flash and welded contactors by matching utilization category, coil voltage, and short-circuit coordination to your motor load. Shop at Stoklink.
16 min read
Vacuum Contactors in Medium Voltage Switchgear: Applications Guide
Vacuum contactors use arc quenching in sealed chambers for MV motor starting and capacitor switching. Sizing, coordination, derating guide. Shop at Stoklink.
15 min read
NO and NC Auxiliary Contacts on a Contactor: Functions, Wiring, and Uses
Learn how NO and NC auxiliary contacts on a contactor work, how to wire them correctly, and avoid costly mistakes in motor control circuits. Shop at Stoklink.
20 min read
Mechanical and Electrical Lifespan of a Contactor: IEC 60947 Guide
AC-3 contactor lifespan per IEC 60947 explained: mechanical vs electrical endurance, sizing rules, and TCO calculations for motor control. Shop at Stoklink.
18 min read
How Contactors Are Used in Motor Control Centers (MCC Panels)
Contactors in MCC panels handle daily motor switching between protection and overload devices, driving reliability and uptime on plant floors. Shop at Stoklink.
21 min read
Best Contactor Brands for Industrial Motor Control
Compare the best contactor brands for industrial motor control in 2025, including ABB, Siemens, Schneider, and Eaton performance insights. Shop at Stoklink.
20 min read
Siemens 3RT vs Eaton DILM Contactor Comparison: Specs, Sizing and Selection Guide
Compare Siemens 3RT vs Eaton DILM contactors by AC-3 rating, frame size, coordination, and accessories with sizing examples and selection. Shop at Stoklink.
19 min read
IEC vs NEMA Contactors: Key Differences, Sizing and Selection Guide
Compare AC-3 rating sizing for IEC vs NEMA contactors with utilization categories, derating tips, and selection guidance for motor control. Shop at Stoklink.
23 min read
ABB vs Schneider Electric vs Siemens Contactor Comparison Guide
Compare ABB contactors with Schneider and Siemens on coils, AC-3 ratings, endurance, and short-circuit coordination for 2026 panel builds. Shop at Stoklink.
20 min read
ABB AF Series vs Schneider TeSys Contactor: Full Technical Comparison
ABB AF contactor vs Schneider TeSys: full technical comparison of coil tech, ratings, coordination, and selection for IEC motor starters. Shop at Stoklink.
20 min read
How to Size a Contactor for a 3-Phase Motor: Engineer Guide
Size a contactor for a 3-phase motor using IEC 60947-4-1 methodology, AC-3 vs AC-4 categories, NEMA equivalents, and Type 2 coordination. Shop at Stoklink.
25 min read
How to Select the Right Contactor for Your Application: Complete Checklist
Master AC3 rating selection with our complete contactor checklist covering load sizing, utilization categories, derating, and coordination. Shop at Stoklink.
27 min read
How to Calculate Contactor Coil Voltage and Power Consumption
Learn how to calculate contactor coil voltage and power consumption to prevent burnout, dropouts and failed outputs in your control circuits. Shop at Stoklink.
21 min read
Types of Contactors in Electrical Systems: Complete Guide for Engineers
AC contactor selection guide covering IEC utilization categories, sizing math, AC vs DC vs vacuum types, and field-tested specs for engineers. Shop at Stoklink.
20 min read
IEC Utilization Categories AC-1 AC-2 AC-3 AC-4 Explained for Contactors
Learn what IEC utilization categories AC-1 AC-2 AC-3 and AC-4 mean for contactors, how rated currents derate, and how to specify correctly. Shop at Stoklink.
20 min read
What Is an Electrical Contactor and How Does It Work: Engineer Guide
Master AC3 duty contactor selection with IEC sizing math, utilization categories, and ABB part references for reliable motor control panels. Shop at Stoklink.
16 min read
Main Parts of a Contactor and What Each Component Does Explained
Arc chute design, coil tolerance, contact materials, and auxiliary contacts explained for engineers specifying reliable industrial contactors. Shop at Stoklink.
20 min read
How Does a Magnetic Contactor Work? Step-by-Step Guide for Engineers
B2B electrical equipment guide explaining how a magnetic contactor works step by step, covering coil energization, arcing, and selection. Shop at Stoklink.
17 min read
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