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Intera 5.3
I/O Devices
PERFORMING A RISK ASSESSMENT
RIA TR R15.306:2014 provides a detailed methodology for performing risk assessments. For Power
and Force Limited collaborative robots, ISO TS 15066 and ANSI R15.06/ISO 10218-2 provide
guidance on the right aspects to be evaluating. It is important to evaluate the entire robotic
application including not just the robot itself, but all tools, fixtures, parts, end effectors, machinery,
etc. within the robotic cell. Once all hazards in normal operation, including capturing both intended
operation and interaction situations as well as unintended, foreseeable misuse situations, the
hazards should be scored on probability of exposure, severity of injury hazard, frequency of
exposure, and avoidability.
After determining the hazards and their risks, the standards require users to attempt to eliminate or
reduce them to acceptable levels. There is a hierarchy of steps to consider, starting with elimination
of hazards at the top to the use of personal protective equipment as the last level. After applying
any changes to the work cell to eliminate or mitigate the hazards, each hazard risk is re-scored to
determine a final risk level and show the work cell meets the desired level of risk.
In the absence of specific limits or standardized, repeatable, precise force/pressure measuring
techniques, customers are testing the robot’s performance with respect to these hazards and
determining the injury severity risk using common sense. In situations where either the part being
handled presents a risk or some equipment in the collaborative work cell presents a hazard, some
customers are choosing to add protective measures that slow, pause or stop the robot when
something is detected within proximity of the robot or the machine it is tending.
WIRING EXAMPLES
For wiring examples, please refer to the Online User Guide at: mfg.rethinkrobotics.com/intera .