ISO 13766-2:2018

Overview - ISO 13766-2:2018 (EMC for functional safety)

ISO 13766-2:2018 specifies test methods and acceptance criteria for the electromagnetic compatibility (EMC) of earth‑moving and selected building construction machinery that have an internal electrical power supply. The standard focuses on additional EMC requirements for functional safety, addressing how electromagnetic disturbances can affect safety‑related parts of control systems (SRP/CS) and electrical/electronic subassemblies (ESA). It applies to machinery types defined in ISO 6165:2012 and ISO/TR 12603:2010 (e.g., drilling and foundation equipment, concrete handling/processing, road construction machinery) and is limited to SRP/CS using components meeting design requirements of performance level PL b or higher (ISO 13849‑1:2015).

Key topics and technical requirements

• Scope & applicability
  • Machines with internal DC/AC or combined power supplies (not applicable to mains‑supplied/grid‑connected machines - IEC 61000 covers those).
  • Focused on safety‑related functions (SRP/CS) and ESAs intended for PL b or above.
• EMC phenomena evaluated
  • Radiated electromagnetic fields from off‑board sources (various strengths/frequencies).
  • Radiated fields from on‑board sources (antennas inside/outside).
  • Electrostatic discharge (ESD).
  • Conducted and coupled electrical transients.
• Test methods & acceptance criteria
  • Provides indicative test procedures for complete machines, ESAs and separate ESAs.
  • Defines performance criteria for behaviour of safety‑relevant systems under EMC stress (including guidance for programmable electronic systems/PES in SRP/CS).
  • Encourages component/subassembly testing (e.g., in shielded rooms) and consideration of wiring/coupling effects when integrating ESAs into machines.
• Documentation
  • Requires reporting of test results (test report) and includes guidance on installation and maintenance aspects affecting EMC.

Practical applications & who uses it

• Primary users
  • Machine manufacturers (design, verification and compliance teams).
  • EMC test laboratories and certification bodies.
  • Safety engineers responsible for SRP/CS and functional safety validation.
  • Maintenance and service organizations assessing site‑specific EMC risks.
• Benefits
  • Reduces risk of safety failures caused by electromagnetic disturbances.
  • Helps validate safety‑related control systems and ESAs for field use.
  • Supports compliance strategy when integrating electronic controls in construction and earth‑moving equipment.

Related standards

• ISO 13766-1:2018 - General EMC requirements for machines with internal power supply
• ISO 13849-1:2015 - Safety‑related parts of control systems (PL concepts)
• ISO 6165:2012, ISO/TR 12603:2010 - Machine classification/terms
• IEC 61000 - EMC for grid‑connected equipment (note: grid‑connected machines fall under IEC 61000)

Keywords: ISO 13766-2:2018, EMC testing, earth‑moving machinery, building construction machinery, functional safety, SRP/CS, ESA, electrostatic discharge, conducted transients, radiated electromagnetic fields.