How to choose PLC products

How to Choose PLC Products

2026 Industrial Intelligence Report

Choosing PLCs—we see mistakes weekly. Here's the complete decision process, from 20+ years of experience.

Key Selection Factors

1. I/O Count

Count your: Inputs and outputs

Plan for: 20% growth

Don't: Max out at 100%

2. Type

Compact: <128 I/O, fixed

Modular: >128 I/O, expandable

Rack: Large systems

3. Communications

Ethernet: Standard now

Legacy: Need compatibility

Future: Plan 10 years

4. Platform

Common platforms: Support, spares

Platform decision: Long-term commitment

Don't: Buy obscure brands

But here's what counts: the platform is a 20-year commitment. Support and spares availability—not features—should drive your choice.

PLC Types Compared

Type I/O Range Best For 2026 Trend
Micro 10-50 Simple control Price pressure
Compact 50-256 Small machines Ethernet common
Modular 256-10K+ Large systems Distributed I/O PAC Unlimited Enterprise Edge analytics

We've seen selection mistakes cost more than the PLC—programming time and support are bigger costs than hardware. Choose common platforms.

— Senior Controls Engineer
Pro-Tip: The biggest mistake is buying features you don't need. The second biggest is buying obscure brands with no support.

Choose common platforms (Siemens, Rockwell, Schneider) for support, training, and spares.

FAQ

+What's most important factor?
Support and spares—features don't matter if you can't get help. Choose common platforms.
+Micro, compact, or rack?
Micro for under 50 I/O, compact for 50-250, modular for more. Don't max out—plan expansion.
+What about price?
PLC hardware is minor cost. Programming, software, and support are bigger. Don't buy cheap on hardware alone.

Need Selection Help?

We help select the right PLC for your needs.

Related Articles

Voltar para o blog

Blog posts

  • Eaton Moeller MCSN4 Pressure Switch: 2026 Guide...

    Discover the Eaton Moeller MCSN4 3-pole pressure switch engineered for direct main-circuit control up to 7 bar. This 2026 technical guide covers IT/OT convergence strategies, ROI analysis, IP65-rated durability, and...

    Eaton Moeller MCSN4 Pressure Switch: 2026 Guide...

    Discover the Eaton Moeller MCSN4 3-pole pressure switch engineered for direct main-circuit control up to 7 bar. This 2026 technical guide covers IT/OT convergence strategies, ROI analysis, IP65-rated durability, and...

  • Eaton MCS22 Pressure Switch: 2026 B2B Guide to ...

    Discover how the Eaton/Moeller MCS22 SPDT pressure switch empowers 2026 smart factories with IT/OT convergence, predictive maintenance readiness, and measurable ROI. Complete engineering guide with specs, troubleshooting, and integration strategies...

    Eaton MCS22 Pressure Switch: 2026 B2B Guide to ...

    Discover how the Eaton/Moeller MCS22 SPDT pressure switch empowers 2026 smart factories with IT/OT convergence, predictive maintenance readiness, and measurable ROI. Complete engineering guide with specs, troubleshooting, and integration strategies...

  • Fujitsu MCF3064SS SCSI MO Optical Drive: 2026 G...

    Discover why the Fujitsu MCF3064SS 640MB SCSI Magneto-Optical drive remains a mission-critical industrial automation asset in 2026. This comprehensive engineering guide covers IT/OT integration strategies, WORM archival compliance, ROI analysis...

    Fujitsu MCF3064SS SCSI MO Optical Drive: 2026 G...

    Discover why the Fujitsu MCF3064SS 640MB SCSI Magneto-Optical drive remains a mission-critical industrial automation asset in 2026. This comprehensive engineering guide covers IT/OT integration strategies, WORM archival compliance, ROI analysis...

1 3