How to verify that industrial robots are CE certified

A robot can arrive with a CE logo on its base, a label in the manual, and a supplier statement saying it is ready for the European market. That is not yet enough to accept it for use. Before commissioning, a quality or safety review should establish whether the CE marking applies to the actual item being purchased, whether the supporting documents are complete and consistent, and whether the robot will remain compliant after integration into a production cell.

The practical answer is simple: verify the marking against the EU Declaration of Conformity, the identification data on the equipment, the instructions, and the technical compliance evidence requested from the responsible economic operator. Then assess the intended installation. A robot arm may be lawfully CE marked as a complete machine, but the final guarded cell, tooling, conveyor interfaces, and safety controls may require a separate conformity assessment by the system integrator.

Start by identifying what is actually being placed on the market

The first source of confusion is the word “robot.” In procurement documents, it may refer to an articulated robot, a cobot, a robot controller, a pre-engineered cell, or an incomplete assembly intended for later integration. These are not treated the same way under EU machinery rules.

A complete industrial robot intended to perform a defined function can generally be supplied as machinery with CE marking and an EU Declaration of Conformity. A robot cell supplied with its own guards, safety devices, control system, and defined operating function may also be placed on the market as complete machinery. By contrast, an assembly that cannot safely perform its intended function until it is combined with other equipment may be partly completed machinery. It should normally be accompanied by a Declaration of Incorporation and assembly instructions rather than a CE marking under the machinery framework.

This distinction matters because a Declaration of Incorporation does not certify a finished production system. It identifies which essential requirements have been addressed and transfers certain integration obligations to the party completing the machinery. Treating such documentation as equivalent to a Declaration of Conformity can leave a serious gap in the safety file.

Check the CE marking on the physical equipment

Inspect the machine and controller rather than relying only on a brochure, quotation, or scanned certificate. The CE marking should be visible, legible, and indelible where applicable. Its presence alone is not proof of conformity, but its absence on equipment presented as complete machinery should trigger an immediate document review.

Record the details shown on the rating plate or identification label:

• manufacturer name and contact address, or the responsible EU-based economic operator where relevant;
• machine type, model, and serial number;
• year of construction where required for the machinery;
• electrical ratings and controller identification;
• the CE marking and any other regulatory markings relevant to the product.

These details should match the Declaration of Conformity and the instruction manual. A declaration naming a product family may be acceptable only if it clearly covers the exact configuration delivered. A mismatch in model number, controller type, serial range, manufacturer identity, or revision level is not a minor administrative issue. It can indicate that documentation belongs to another variant or that the declared assessment does not cover options installed on the delivered unit.

Also look for markings that imitate the CE symbol. Genuine CE letters have defined proportions, although field measurement is rarely the most useful test. A more meaningful question is whether the manufacturer can produce a coherent compliance package tied to the machine. A correctly shaped logo cannot cure an unsupported declaration.

Read the EU Declaration of Conformity as a verification document

The EU Declaration of Conformity is the central document for an Industrial Robots CE certified claim. It should be provided in an appropriate language for the market where the machine is made available, subject to the applicable national requirements. Ask for the signed declaration that accompanies the delivered equipment, not merely a generic sample.

A usable declaration should identify the manufacturer, describe the machinery sufficiently to trace it, state that the declaration is issued under the manufacturer’s sole responsibility, and identify the applicable EU legislation. It should also name the person authorised to compile the technical file, be dated, and be signed or otherwise validly authorised by the manufacturer.

For machinery placed on the EU market under the current machinery framework, the declaration commonly refers to the Machinery Directive. Other legislation may also apply depending on the design and supplied functions. Examples can include electromagnetic compatibility requirements, electrical safety requirements, radio equipment rules for wireless functions, or restrictions on hazardous substances for relevant electrical and electronic equipment. Do not assume every directive applies to every robot; ask why each listed law is relevant to the supplied configuration.

A declaration that only says “CE certified” without identifying applicable legislation, product details, and responsible parties should not be accepted as equivalent to an EU Declaration of Conformity. CE marking is usually based on a manufacturer’s conformity assessment and declaration; it is not automatically a third-party certificate.

Do not confuse CE marking with a notified-body certificate

Industrial robot buyers sometimes request a “CE certificate” from a notified body and treat its absence as evidence of non-compliance. That approach can be misleading. For many categories of machinery, the manufacturer may carry out the required conformity assessment without a notified body, provided the applicable procedure allows it and the relevant requirements are met.

A notified body may be involved for certain machinery categories or assessment routes, but its involvement is not a universal requirement for robot equipment. Conversely, a certificate from a laboratory, insurer, consultant, or non-notified organisation does not itself establish CE conformity. Such documents can support confidence in testing or design work, yet they should be read alongside the legally required declaration and technical evidence.

Ask the supplier to explain the assessment route used. A clear answer should distinguish between product testing, voluntary certification, functional safety validation, and the legal conformity declaration. Vague phrases such as “international certificate available” or “CE approved” deserve follow-up questions.

Request evidence that supports the declaration

Manufacturers are generally not expected to hand over the entire technical file to every buyer. The file can contain proprietary drawings, source information, and design records. Still, a purchaser responsible for workplace safety can reasonably request enough evidence to verify that the declaration is credible and that the robot can be safely integrated.

Useful evidence may include a risk assessment summary, a list of applied standards, relevant test summaries, safety function descriptions, wiring information, installation requirements, and operating limits. The aim is not to repeat the manufacturer’s conformity assessment from scratch. It is to determine whether the supplied information supports safe acceptance and integration.

Risk assessment and intended use

The risk assessment should reflect the intended application, not only the bare robot arm. Review foreseeable tasks such as teaching, program verification, maintenance, recovery after a stop, gripper changeover, and manual handling near the cell. The information should define limitations on payload, reach, speed, environmental conditions, mounting orientation, and tool interfaces.

Pay attention to stated prohibited uses. A robot approved for a normal indoor manufacturing environment may not be suitable for explosive atmospheres, washdown areas, cleanrooms, food-contact zones, hazardous chemicals, or outdoor operation unless those conditions are specifically addressed. A CE mark does not automatically cover every site condition.

Safety-related control functions

For industrial robot systems, the safety control architecture is often where a seemingly complete file becomes weak. Request documentation for emergency stop functions, protective stop functions, safeguarding interfaces, enabling devices where used, mode selection, restart prevention, safe speed functions, and fault response.

The documentation should state how the safety function was designed and validated. Depending on the system, this may involve standards for functional safety of control systems, such as EN ISO 13849 or IEC 62061, alongside the machinery safety standards used by the manufacturer. Check that the evidence addresses the installed controller, safety PLC or relay logic, interlocks, scanners, light curtains, gates, and robot safety inputs—not merely a generic circuit concept.

A recurring problem appears when an integrator modifies a validated safety circuit after delivery. Adding a gate, changing a protective device, bypassing an input during troubleshooting, or altering safe speed settings can invalidate the assumptions behind the original validation. Changes must be documented, assessed, and validated by the party responsible for the modified system.

Use standards correctly during the review

Industrial robot safety commonly draws on standards addressing robot design, robot system integration, risk assessment, electrical equipment, and functional safety. Standards can provide a presumption of conformity when they are harmonised and correctly applied, but listing a standard number on a declaration does not prove that every requirement was met.

Review standards in context. A robot manufacturer may apply a robot safety standard to the arm and controller, while the cell builder must address safeguarding layout, access points, material flow openings, peripheral equipment, and the interaction of machines. For collaborative applications, reduced speed or force claims should be linked to the task-specific risk assessment, end effector design, workpiece characteristics, contact hazards, and validation method. Calling a robot “collaborative” does not remove the need for safeguarding or risk reduction.

Where a declaration cites harmonised standards, verify that the cited editions are appropriate to the placing-on-market date and relevant to the product. Standards evolve, and a document copied forward from an older model may no longer reflect the design. This review is especially important after controller upgrades, new firmware with safety-related functions, or changes to the end-of-arm tooling interface.

Verify the installation, not only the robot

A robot that is compliant when supplied can become part of a non-compliant assembly after installation. The responsible party for the final assembly must be identified before acceptance. In a turnkey project, it may be the system integrator. In a self-integrated installation, the operating company may assume responsibilities normally handled by a machinery manufacturer.

Walk down the installed cell against the layout, risk assessment, and supplied instructions. Confirm that guards and perimeter distances match the design; openings do not permit hazardous reach-in; access doors are interlocked as specified; emergency stops are accessible; and the protective devices actually stop or prevent hazardous motion. Check that robot motion limits, base anchoring, cable routing, pneumatic energy isolation, and tool retention match the approved installation conditions.

Commissioning records should demonstrate more than normal production operation. They should cover expected abnormal conditions: a gate opened during movement, a safety scanner interruption, loss and restoration of power, communication faults, emergency stop reset, recovery from protective stop, and restart after a safety device has been actuated. The machine should not restart unexpectedly after a protective condition is cleared.

Red flags that justify holding acceptance

• The CE marking is present, but no declaration is supplied for the exact model or configuration.
• The supplier provides a Declaration of Incorporation while marketing the delivered cell as ready-to-run machinery.
• Model numbers, manufacturer names, or controller references conflict across labels, manuals, and declarations.
• The declaration uses broad wording but does not identify applicable legislation or an authorised signatory.
• The manual lacks installation conditions, residual risks, maintenance instructions, or safety function information.
• A supplier relies only on a third-party “certificate” and cannot explain the conformity assessment route.
• Guards, end effectors, software, safety devices, or operating modes were changed after the supplied documentation was issued.
• The final cell has no documented risk assessment, validation record, or assigned party responsible for its conformity.

Any one of these findings does not automatically prove that the equipment is unsafe, but it does mean the CE claim has not been adequately verified. Keep the issue open until the responsible party supplies corrected documents, explains the compliance boundary, or completes the necessary assessment.

Maintain a traceable acceptance record

After verification, retain a controlled record containing the declaration, equipment identification, manuals, relevant risk assessment information, safety validation evidence, installation drawings, change records, and commissioning results. Link the file to the asset number and final cell configuration. This becomes important when a controller is replaced, a tool is changed, a line is relocated, or an incident requires review of the original safety assumptions.

CE compliance is not a permanent label detached from the machine’s condition. Major modifications, new operating modes, changed safeguards, altered loads, or integration with additional equipment can create a new conformity assessment obligation. The most reliable verification process therefore ends with a clear boundary: what the manufacturer declared, what the integrator completed, and what the site must control throughout the robot’s operating life.