Chapter 3: Safety Precautions 19
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Other Safeguards
In addition to physical barriers, e-stops, and presence-sensing devices, safeguards
can include, but are not limited to:
• Awareness signals
An awareness signal is an audio or visual alarm, such as a buzzer or light,
activated by a sensor in a larger envelope outside the inner, e-stop connected
envelope. The signal alerts the intruder to move away before tripping the e-stop
circuit.
Example of barriers and light curtain.
Example of barriers and pressure-sensitive mats.
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