SIL / PL engineering support

SIL and PL programs that hold up in audit

IEC 61508, ISO 13849, IEC 62061, and related functional safety for electronics, controls, and machinery safety functions.

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Functional safety controls and industrial systems

What this engagement covers

We help define safety functions, allocate SIL/PL targets, structure the safety lifecycle, and prepare evidence (requirements, architecture, V&V, diagnostics) so assessors and customers can follow the claim — without turning the whole product into “safety rated” unnecessarily.

Best fit for

Machinery OEMs needing PL claims on safety-related parts of control systems
Industrial electronics targeting SIL for sensors, relays, or logic solvers
Robot / AGV / collaborative cell safety controllers
Teams integrating certified safety components into a system-level claim

What's included

Hazard & risk analysis interface to safety function definition
SIL / PL target setting and architecture options (HFT, categories, subsystems)
Safety requirements specification (SRS) structure
Hardware/software lifecycle documentation map (IEC 61508 / ISO 13849)
Diagnostics, proof-test, and PFH/PFD concept support
Assessor / notified body interface and gap closure

Product types we support

Scope changes by product architecture — these are the classes we regularly take through this pathway.

Safety PLCs & logic solvers

SIL-capable controllers and I/O

Safety sensors & light curtains

ESPE, scanners, interlocks as SRP/CS elements

Robot & cobot controllers

ISO 10218 / ISO/TS 15066 linked safety functions

AGV / AMR safety systems

Speed/separation monitoring, field switching

Burner / process safety (selected)

IEC 61511 interfaces when process sector applies

Variable speed drives with STO

Safe Torque Off and related functions

Technical categories

Integrity levels & metrics

SIL 1–3 (IEC 61508)PL a–e (ISO 13849)Categories B, 1, 2, 3, 4HFT / SFF / DC conceptsPFH / PFD avgProof test intervals

Evidence packages we structure

Safety planSRS / safety requirementsArchitecture & FMEA/FMEDA inputsV&V plan and reportsUser documentation (proof test, response time)Assessment report readiness

Regions & schemes

Market access is scheme-specific. We map filings and evidence to the regions you actually sell into.

EU / UK

•Machinery Regulation / Directive
•Notified Body for certain safety components
•CE technical file with FS evidence

Global industrial

•IEC 61508 family assessments
•Customer SIL/PL requirements (oil & gas, factory automation)

North America

•OSHA / ANSI B11 / NFPA 79 interfaces
•UL functional safety certifications where pursued

Directives & regulations

Machinery Regulation (EU) 2023/1230

Includes requirements affecting safety-related control systems

2006/42/EC (transition contexts)

Legacy machinery CE files still in the field

Low Voltage / EMC (supporting)

Electrical safety & EMC remain necessary but separate from SIL/PL

Key standards

Standard	Focus
IEC 61508-1…7	Functional safety of E/E/PE safety-related systems
ISO 13849-1 / -2	Safety-related parts of control systems — PL
IEC 62061	Functional safety of safety-related control systems (machinery)
IEC 61511	Functional safety — safety instrumented systems (process)
IEC 61800-5-2	Adjustable speed drives — safety requirements (STO etc.)
ISO 10218 / ISO/TS 15066	Industrial / collaborative robot safety

Marks & program keywords

IEC 61508ISO 13849IEC 62061IEC 61511ISO 10218

How we work

One clear path from classification to market-ready evidence.

Step 1

Define

Hazards, safety functions, and integrity targets

Step 2

Architect

Categories, HFT, diagnostics, and partitioning

Step 3

Evidence

Lifecycle docs, V&V, and reliability data

Step 4

Assess

Independent assessment readiness

Engineering notes

We distinguish element-level certification (e.g. a safety relay) from system-level PL/SIL claims — most customer disputes happen at that boundary.

Software per IEC 61508-3 or ISO 13849 software guidelines is scoped explicitly when your safety function depends on firmware.

Traceable safety case

Clear SIL/PL path

Assessor-ready package

Ready to scope Functional Safety?

30-minute consultation with Hazloc Labs — bring your product type, target markets, and any existing reports.

+1 (972) 383-9097•hazloclabssales@gmail.com

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