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Set up the safe zone for the complete robot application—not just the humanoid itself. Assess the robot’s reach, movements, tools, payload, work tasks, nearby people and surroundings; then select and validate safeguards for those hazards. There is no universal safe distance for humanoid robots: separation depends on the application’s movements, human approach, sensing accuracy and measured stopping response.

What counts as the robot’s safe zone?

The zone must account for the installed system in normal operation and foreseeable fault conditions. A humanoid’s body is only part of it: arms and legs, carried objects, tools, workpieces and movement paths can all enter hazardous space. Include the people who may approach, perform tasks, clear faults or maintain the system.

Map potential pinch and crush locations, including places where a person could be trapped between the robot and a wall, fixture or other equipment. EU-OSHA guidance on collaborative robots calls for clearly defined and demarcated collaborative space, adequate clearance and suitable protective measures against crushing against surrounding structures.

Floor markings and signs help people recognize where the robot may move; they do not physically prevent entry or stop motion. Treat them as supporting communication, not safeguarding.

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How to plan and install the safeguards

  1. Describe the actual application. Record the robot’s tasks, movements and operating modes, tooling, payloads, speeds, foreseeable access, maintenance work and the people who may approach. Assess the complete installed system rather than relying on the humanoid’s product description. A Universal Robots UR3e manual, for example, assigns integration risk assessment a role in determining safety configuration and whether additional emergency stops or protective measures are needed; that example is not a humanoid-specific instruction.
  2. Map and demarcate the movement envelope. Include the reach of limbs, carried items and tools, as well as paths the system could enter during normal operation or a fault. Identify pinch and crush spaces against nearby structures. Mark the boundary clearly so people can understand it, while recognizing that markings alone cannot protect them.
  3. Choose safeguards to match the hazards. Depending on the risk assessment, options may include physical guarding with interlocked access, presence sensing that initiates a protective stop, or an assessed collaborative operating method. ISO describes safety-rated monitored stop, hand guiding, speed-and-separation monitoring, and power-and-force-limiting as collaborative techniques. A humanoid shape or “collaborative” label does not establish that contact is safe.
  4. Engineer and validate separation monitoring if used. Determine separation using the relative speeds of people and robot, brake and control response times, and the accuracy and coverage of sensors or robot measurements. EU-OSHA describes triggering a protective stop when separation is lost. Validate the actual stopping behavior and the complete safety chain on the installed system and task; do not choose a distance from a generic chart or marketing claim.
  5. Position emergency stops for the people who may need them. Make controls readily accessible in relevant work zones and train personnel to find and use them. OSHA’s 1987 robotics instruction describes accessible stops in zones where needed, including palm buttons and pull cords, and says emergency stops override other controls. That is legacy guidance: verify current jurisdictional and machine-specific requirements. The required stop behavior, circuit and placement depend on the system.
  6. Set up maintenance isolation and recovery. Establish equipment-specific energy-isolation and lockout/tagout procedures before servicing or entering a hazardous envelope, and train affected workers. Pressing an emergency-stop button is not energy isolation. OSHA’s robotics instruction calls for lockout procedures during preventive maintenance or repair, and its technical manual discusses lockout/tagout procedures and training.
  7. Reassess when the application changes. Review the risk assessment after changes to tooling, software, payload, layout, speed, work mode or access patterns. Maintain and periodically check safety-critical equipment and connections. The cited guidance does not establish one inspection interval or validation procedure for every system; use the manufacturer’s instructions, applicable standards and a qualified system integrator.

Which safeguarding approach fits the work?

Compare approaches against the hazards and the way people use the space. The cited sources identify methods but do not establish a universal ranking or humanoid-specific product comparison.

Approach When it may fit What to assess
Guarding with interlocked access People can be physically excluded from the hazardous area during robot operation. Access points, interlock behavior, hazards during entry and safe recovery.
Presence sensing with a protective stop People need access near the robot and the application can use detection to initiate a protective stop. Sensor coverage and blind spots, accuracy, approach paths, stopping response and the validated safety control chain.
Assessed collaborative method The task requires a defined form of human–robot collaboration and the risk assessment supports that method. Whether the method is actually implemented and validated for the robot, task, contact or separation hazards, and surrounding structures.

For each option, consider task and contact consequences, whether people must share space, human and robot speeds, measured stopping behavior, sensing performance, safety-function performance, restart and recovery, maintenance access, and local requirements. Do not infer safety from the robot’s form factor.

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How far away should people stay?

No single distance is established for all humanoids. A suitable separation depends on the robot’s and person’s relative movement, the system’s brake and control response, and sensing or measurement accuracy. Those inputs vary by robot, task, layout and operating mode. Use a qualified, application-specific assessment and validate the installed system’s stopping behavior rather than adopting a generic buffer.

What is the difference between an emergency stop and a protective stop?

Function Purpose What it does not replace
Emergency stop A readily accessible control for a person to initiate an emergency stop; its specific behavior is determined for the system. Guarding, presence sensing, designed protective stops or energy isolation for maintenance.
Protective stop A safety function that stops robot motion in response to a defined condition, such as loss of required separation in a monitored system. Risk assessment, suitable safeguarding for other hazards, or maintenance lockout/tagout.

OSHA’s technical material and EU-OSHA’s collaborative-robot guidance discuss these safeguards in distinct roles. A button alone does not make a workcell safe, and a stop control should not be treated as a substitute for a properly designed and validated safety system.

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What do the standards say about humanoid robots?

ISO/TS 15066:2016 addresses collaborative industrial robot systems described in ISO 10218-1 and ISO 10218-2, supplementing those standards. ISO says it does not apply to non-industrial robots; its principles may inform other contexts, but the specification should not be presented as governing every service or consumer humanoid. ISO reports the 2016 edition was reviewed and confirmed in 2022 and remains current.

OSHA’s standards overview distinguishes ISO 10218-1 requirements for robots from ISO 10218-2 requirements for integration of a complete robot system, and notes that consensus standards are not OSHA regulations. ISO has published a 2025 edition of ISO 10218-1. Confirm the applicable edition, national adoption and legal requirements for the installation’s country rather than assuming one standard or edition applies everywhere.

This guidance is not a site-specific risk assessment or installation design. The cited material focuses mainly on industrial robots and collaborative workplaces, not every humanoid product or use.

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