There is no single safety setup required for every industrial robot. Safeguards should be selected after assessing the complete application: the robot, tooling, workpiece, process, cell layout, operating modes, and the tasks people perform. Depending on the hazards, a safe installation may need guards and interlocks, protective sensing, safety-related control functions, safe procedures for access and maintenance, and worker training.
What rules and standards apply?
Requirements depend on the installation and jurisdiction. In the United States, OSHA says, “There are currently no specific OSHA standards for the robotics industry.” That does not mean robot work is unregulated: employers must still identify and follow applicable workplace requirements. OSHA’s Technical Manual points to relevant general-industry or construction standards, as applicable, and describes consensus standards as guidance rather than OSHA regulations.
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The international robot-safety standards were revised in 2025. ISO 10218-1:2025 addresses industrial robots as machines; ISO 10218-2:2025 addresses applications, integration, and robot cells. ANSI/A3 R15.06-2025 is the U.S. adoption of those parts and replaces the 2012 edition. Standards are not interchangeable with legal requirements, and their adoption and application vary by jurisdiction. In Europe, harmonized machinery standards have a role in the regulatory framework; the applicable duties still depend on the specific installation and circumstances.
OSHA’s Technical Manual includes references to older editions and advises checking current editions as standards change. For engineering or conformity work, verify requirements against the official, current standards and applicable local rules. The ISO Part 2 text reviewed for this article was available as a preview, not an official full-text copy.
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How to assess the robot application
OSHA’s 1987 robotics directive states: “The proper selection of an effective robotics safety system must be based on hazard analysis of the operation involving a particular robot.” In practice, that means evaluating the integrated cell, not just the robot arm.
- Define the cell and the people who may be exposed. Include the robot, end-effector, workpiece, task program, auxiliary equipment, neighboring machines, obstructions, and safeguards. Consider operators, programmers, setup staff, maintenance workers, integrators, and anyone else who could approach the cell.
- List every mode and task. Assess automatic production as well as startup, teaching and programming, setup, testing, adjustment, fault clearing, repair, and maintenance. Non-routine work deserves explicit attention: OSHA notes that workers may be inside the robot’s working envelope during these activities.
- Identify hazards and foreseeable failures. Consider the task, startup and programming, the environment and cell location, corrective work, human error, and possible robot malfunctions. Include hazards from the process and tooling, such as welding, machining, painting, sharp tools, hot surfaces, dropped loads, or nearby equipment.
- Choose controls for the hazards found. Select an appropriate combination of safeguards, protective devices, safety-related control functions, motion limits, and work practices. A device that addresses one access route or hazard may not address another.
- Verify the integrated installation before use. Review installation and testing, manufacturer requirements, safe work areas, and task-based procedures. Involve users and workers in the assessment. Reassess when a meaningful change is made to the robot, tooling, task, layout, or operating mode.
Which safeguards may be needed?
The risk assessment determines the required combination. These categories are options to evaluate, not a universal checklist that every cell must satisfy in the same way.
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- Standard type
| Safeguard category | What it can address | What to assess |
|---|---|---|
| Perimeter guards and interlocked access | Restricting entry to a safeguarded space; an interlock can stop or prevent hazardous operation when an access guard is opened, where the design and assessment call for it. | All access paths, how entry is controlled, and whether opening the guard reliably prevents exposure to the relevant hazard. |
| Sensitive protective equipment | Detecting access or presence in applications suited to safety-rated sensing. A light curtain is one possible example. | Coverage of access routes, reach-over and reach-under possibilities, stopping behavior, and hazards the sensing device does not detect. |
| Safety functions and limiting devices | Controlling or reducing risk through safety-related control functions or appropriate limits on motion. | Whether the function is designed and validated for safety. An ordinary software setting should not be treated as a safety function unless it has been assessed as one. |
| End-effectors and process equipment | Addressing hazards created by grippers, welding guns, spray guns, exchanged tools, the workpiece, and the process itself. | Tool changes, pinch or impact hazards, sharp or hot surfaces, and hazards that remain when robot motion is controlled. |
| Safe access and work procedures | Managing entry, teaching, maintenance, fault clearing, and safe restart. | Whether instructions match the actual equipment and control modes, and what energy-control and restart procedures apply to the machinery and jurisdiction. |
A light curtain, fence, or motion limit is not automatically suitable or sufficient on its own. The choice depends on the hazards and work pattern in the actual cell. Have a qualified integrator or robot-safety professional assess the installation, including stopping performance, detection coverage, and safety-system integration.
How should safeguards be compared?
When several controls could address a hazard, compare them against the work people actually do and the cell’s physical arrangement. Useful assessment questions include:
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- Which hazard, task, and operating mode does the control address?
- Does it prevent access, detect presence, or reduce a particular risk by controlling motion?
- What stopping behavior and separation are achievable in this installation?
- Can someone reach around or over it, or enter by another route?
- How will it affect visibility, production, and worker workflow?
- What validation, inspection, maintenance, training, and safeguards against bypassing will it require?
- Does the selected design meet the applicable local requirements?
Exact placement, separation distances, and required safety-system performance cannot be specified without information about the task, layout, access patterns, stopping characteristics, and jurisdiction.
Do collaborative robots need safeguards?
Yes. “Collaborative” describes an application or task; it is not a blanket exemption from risk assessment or safeguarding. The robot, end-effector, workpiece, speed, possible contact scenarios, and human task all affect risk. A tool or workpiece can introduce hazards even when the robot has collaborative features.
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Collaborative safety functions may be built into the robot, supplied by a protective device, or provided by a combination of measures. Power-and-force-limited applications require assessment of relevant power, force, and ergonomic parameters. Protective devices may still be needed. If a cell switches between autonomous and collaborative operation, control of that mode change is safety-critical and should be addressed through the control system and risk assessment.
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Procedures should reflect the actual machine, tooling, control modes, and tasks. Workers need to know how entry is authorized, how the system is made safe, how teaching or maintenance is performed, how faults are cleared, and how a safe restart is confirmed. Provide training for the people who operate, program, set up, and maintain the equipment.
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There is no single lockout or restart procedure that can be prescribed for every robot cell from the information available here. Determine the appropriate energy-control process from the machinery and applicable rules, and ensure procedures cover hazards from auxiliary equipment and the process as well as robot motion.
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