If personal safety is needed, there are versions of the NAMUR output that are also fail-safe and have a SIL3 rating (with the appropriate amplifier). A fail-safe output ensures that if there is a failure, the output will sense a problem and fail only in the safe mode. With this NAMUR fail-safe output, you will also need the fail-safe-rated input or amplifier. This amplifier could be dual rated for personal safety and classified hazardous locations for gas, dust, or fibers. With this fail-safe sensor and amplifier, this “system” would have SIL3.
Usually, NAMUR output products (which include encoders and proximity sensors) are used in classified hazardous location areas which have explosive gas, dust, or fibers present. The fail-safe NAMUR output sensor is used where there is a personal safety hazard to protect personnel when they are working at or near the equipment. A fail-safe NAMUR version with the appropriate intrinsically/fail-safe barrier can provide both explosion hazard and personal safety protection.
If personal safety is needed, there are versions of the NAMUR output that are also fail-safe and have a SIL3 rating (with the appropriate amplifier). A fail-safe output ensures that if there is a failure, the output will sense a problem and fail only in the safe mode. With this NAMUR fail-safe output, you will also need the fail-safe-rated input or amplifier. This amplifier could be dual rated for personal safety and classified hazardous locations for gas, dust, or fibers. With this fail-safe sensor and amplifier, this “system” would have SIL3. Usually, NAMUR output products (which include encoders and proximity sensors) are used in classified hazardous location areas which have explosive gas, dust, or fibers present. The fail-safe NAMUR output sensor is used where there is a personal safety hazard to protect personnel when they are working at or near the equipment. A fail-safe NAMUR version with the appropriate intrinsically/fail-safe barrier can provide both explosion hazard and personal safety protection.
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