Robot safety testing is the systematic evaluation of industrial robots, collaborative robots, and autonomous mobile robots against internationally recognized standards such as ISO 10218, ISO/TS 15066, ISO 13482, and IEC 60204-1 to verify that machines achieve an acceptable level of risk reduction for operators and bystanders. Performed by accredited third-party laboratories, robot safety testing covers electrical safety, mechanical hazards, functional safety, and electromagnetic compatibility, and provides the technical evidence needed for CE marking, NRTL certification, and GB standard compliance in global markets.
Technical Overview
Robot safety testing is a structured process for verifying that a robot or integrated robotic system meets the essential safety requirements defined by international, regional, and national standards before it is placed on the market or deployed in a workplace. The core framework for industrial robots is defined in ISO 10218-1 (requirements for robots) and ISO 10218-2 (requirements for robot systems and integration), supplemented by ISO/TS 15066 for collaborative applications, ISO 13482 for personal care robots, ISO 3691-4 for driverless industrial trucks, and UL 3300 for autonomous, mobile, and service robots.
A complete robot safety evaluation combines several disciplines. Electrical safety is assessed against IEC 60204-1, functional safety of control systems against ISO 13849-1 or IEC 62061, and protective equipment against IEC 61496. Because a robot is only as safe as its integration, testing addresses both the robot itself and the application-level safeguards of the final installation. Test reports and certificates issued by accredited third-party laboratories support regulatory compliance, including CE marking under the EU Machinery Regulation, NRTL listing for North America, UKCA marking for the United Kingdom, and GB standard conformity for the Chinese market.
Testing Samples
Robot safety testing applies to a broad range of machinery, from fixed industrial manipulators to mobile and consumer robots. Typical sample categories submitted to laboratories include:
Industrial Robots
Articulated robots, SCARA robots, delta and parallel robots, cartesian and gantry robots, and dedicated welding, painting, palletizing, and material-handling robots, together with their controllers and teach pendants, evaluated under ISO 10218-1 and IEC 60204-1.
Collaborative Robots
Power- and force-limited robot arms designed to operate alongside humans without full physical guarding, as well as collaborative end effectors and grippers, evaluated against ISO 10218-1 and ISO/TS 15066.
Autonomous Mobile Robots and AGVs
Automated guided vehicles, autonomous mobile robots, autonomous forklifts, and mobile delivery platforms, evaluated under ISO 3691-4 and UL 3300, including their navigation sensors, personnel detection functions, and braking performance.
Service and Personal Care Robots
Hous_cleaning and floor-cleaning robots, educational robots, mobile servant robots, physical assistant robots, and person carrier robots, evaluated against ISO 13482 and relevant household equipment standards.
Robot Safety Components and Accessories
Safety laser scanners, electro-sensitive protective equipment, 3D safety cameras, emergency stop devices, enabling devices, safety controllers, safety PLCs, and tool changers that perform safety functions within a robotic cell.
Testing Items
Depending on the robot type, operating environment, and target market, robot safety testing typically covers the following items:
- Risk assessment and risk reduction verification in accordance with ISO 12100 and ISO 10218-2 for integrated systems
- Electrical safety under IEC 60204-1: insulation resistance, dielectric strength, protective bonding continuity, residual voltage discharge, protection against electric shock, and verification of supply disconnection
- Functional safety verification of safety-related control systems, including Performance Level (PL) per ISO 13849-1 and Safety Integrity Level (SIL) per IEC 62061
- Emergency stop and protective stop function testing, including stop category, stopping time, and stopping distance per ISO 13850 and ISO 10218-1
- Collaborative operation methods: safety-rated monitored stop, hand guiding, speed and separation monitoring, and power and force limiting per ISO 10218-1 and ISO/TS 15066
- Pressure and force measurement against the body region thresholds defined in ISO/TS 15066 Annex A
- Performance of electro-sensitive protective equipment, including detection capability, response time, and angle of approach per IEC 61496
- Mechanical hazard assessment: restricting space and limiting motion, pinch and crush zones, stability, tipping resistance, and floor loading
- Speed reduction and safe distance verification for collaborative workstations per ISO 13855 and ISO 13857
- Electromagnetic compatibility under IEC 61000-6-2 and IEC 61000-6-4, covering emissions and immunity to electrostatic discharge, radiated fields, bursts, and surges
- Environmental endurance covering temperature, humidity, and vibration per the IEC 60068-2 series
- Battery and charging system safety for mobile and cordless robots per IEC 62133-2
- Noise emission measurement and declaration
- Cybersecurity evaluation of networked robotic systems per the IEC 62443 series
- Verification of markings, warning labels, and adequacy of instructions for use
Testing Methods
Robot safety testing follows a combination of documentation review, laboratory measurement, and functional validation. Accredited third-party laboratories apply the following principal methods:
- Documentation review: examination of the risk assessment file, technical construction file, circuit diagrams, software documentation, and certificates of safety components used in the control system
- Construction and visual inspection: verification of enclosures, guarding, cable management, labeling, and mechanical integrity against the applicable clauses
- Electrical measurement: insulation resistance testing, dielectric strength (hipot) testing, protective bonding resistance measurement, and residual voltage measurement after disconnection
- Functional testing of safety functions under normal conditions and under single-fault conditions, using fault injection to confirm that the safety-related control system behaves predictably when a component fails
- Force and pressure testing for collaborative robots, using calibrated force sensors and pressure-mapping films applied to standardized contact locations on the robot, with measured values compared against the permissible thresholds of ISO/TS 15066
- Kinematic measurement of speed, separation distance, stopping time, and stopping distance using calibrated optical and positional measurement instruments
- Safety sensor verification: testing of resolution, detection capability, response time, and muting behavior for scanners, light curtains, and vision-based protective devices
- EMC testing in shielded chambers, covering conducted and radiated emissions as well as immunity to electrostatic discharge, radio-frequency fields, electrical fast transients, and surges
- Environmental conditioning in climatic chambers and on vibration tables to confirm safe operation within declared environmental limits
- On-site or application-level validation of integrated robot systems at the end-user facility, confirming that safeguards, procedures, and interfaces function as designed in the real installation
Applications
Robot safety testing serves manufacturers, system integrators, and end users across virtually every industry that deploys robotic automation:
- Automotive manufacturing: spot welding, arc welding, painting, and final assembly robot cells
- Electronics and semiconductor production: high-speed pick-and-place robots and collaborative assembly stations
- Logistics, warehousing, and e-commerce: autonomous mobile robots, automated guided vehicles, and palletizing systems
- Healthcare and laboratory automation: sample-handling robots, mobile servant robots, and physical assistant robots
- Food and beverage processing: washdown-rated robots and packaging lines
- Agriculture, construction, and mining: field robots and heavy-duty autonomous equipment
- Consumer and commercial service robots: cleaning robots, delivery robots, and educational robots for homes, hotels, and public spaces
Beyond regulatory compliance, robot safety testing is increasingly used to satisfy customer audits, insurer requirements, workplace safety obligations of employers, and procurement specifications in safety-critical sectors.
FAQ
Is robot safety testing legally mandatory?
Robots placed on most major markets must satisfy machinery safety legislation, such as the EU Machinery Regulation, the United Kingdom supply regulations, OSHA workplace rules in the United States, and Chinese GB requirements. Testing by accredited third-party laboratories provides the objective evidence needed to demonstrate conformity with the harmonized standards that regulators and courts recognize.
Which standards apply to collaborative robots?
Collaborative robots are evaluated primarily against ISO 10218-1, ISO 10218-2, and ISO/TS 15066. Testing verifies the chosen collaboration method, such as safety-rated monitored stop or power and force limiting, and confirms that contact forces and pressures remain below the thresholds published for each body region.
What is the difference between PL and SIL?
Performance Level (PL), defined in ISO 13849-1, and Safety Integrity Level (SIL), defined in IEC 62061, are two recognized metrics for the reliability of safety-related control functions. Both express the probability of dangerous failure; the applicable metric depends on the architecture of the robot control system and the referenced product standard.
Do autonomous mobile robots require different testing?
Yes. Mobile robots are additionally evaluated under ISO 3691-4 for driverless industrial trucks and UL 3300 for service and autonomous robots, which address personnel detection, speed control on defined routes, braking performance, zone restrictions, and battery and charging safety.
How long does robot safety testing take?
Timelines depend on robot complexity, the number of safety functions, and whether testing covers a robot alone or an integrated cell. Simple electrical safety evaluations may be completed within a few weeks, while full functional safety and collaborative force-limiting programs can extend over several months.
Can testing be performed on site?
Many safety validations, particularly application-level assessments of integrated systems under ISO 10218-2, are performed at the manufacturer or end-user facility, while electrical, EMC, and environmental testing is generally conducted in laboratory test chambers to ensure reproducible conditions.
