The Counterfeit Problem in Industrial Automation
The secondary market for industrial automation components — PLCs, drives, HMIs, and I/O modules — is worth billions of dollars annually. Unfortunately, it also attracts counterfeit products that can cause equipment damage, production failures, and safety incidents.
Knowing how to verify authenticity before purchasing used or surplus components is an essential skill for any maintenance engineer or procurement professional.
Visual Inspection: What to Look For
Start with a thorough visual inspection of any photos provided by the supplier:
- Label quality — Genuine labels have crisp printing, correct fonts, and proper alignment. Blurry text, incorrect colors, or misaligned labels are red flags.
- Serial number format — Each manufacturer has a specific serial number format. Verify the format matches the expected pattern for that product line.
- Housing quality — Genuine units have consistent plastic quality and precise molding. Counterfeits often show visible seams, uneven surfaces, or incorrect color shades.
- Connector condition — Check for bent pins, corrosion, or signs of rework on connectors.
Documentation to Request from Any Supplier
Before purchasing used industrial components, always request:
- High-resolution photos of all sides of the unit
- Photo of the serial number label
- Functional test report showing the unit powered on and passed basic diagnostics
- Clear statement of condition (new, refurbished, used-tested, as-removed)
- Warranty terms and return policy
Brand-Specific Verification Tips
- Allen-Bradley — Rockwell Automation provides a Product Authenticity Verification tool on their website for some product lines.
- Siemens — SIMATIC products have a product key verification system for software-licensed components.
- Mitsubishi — Request the production date code and verify it matches the serial number format for that series.
Why Source from NORTHLINK
Every component sourced through NORTHLINK comes with a condition report, functional test documentation, and our standard warranty. We only work with qualified suppliers who meet our verification standards.
Submit your requirements through our Request a Quote page.