Detection without magnetic target or coded actuator
ifm’s latest advancement in safety switch technology enables an inductive proximity sensor to be applied in safety applications. ifm’s fail-safe inductive sensors do not require a coded magnet or keyed target for safe operation. The wear-free, one-piece solution replaces the traditional two-piece safety switch by integrating ifm’s patented non-contact inductive sensing principle.
Similar to an inductive proximity sensor, ifm’s fail-safe sensor can detect any standard metal target such as stainless or mild steel. The difference is ifm’s control-reliable design. An ifm fail-safe inductive sensor provides continuous evaluation of its internal circuitry to indicate proper operation and to insure that no faults have occurred. The sensor’s continual self-check operation enables it to achieve the following safety certifications: - IEC 61408 and ISO 13489-1 Pl d.
- IEC 61408 and ISO 13489-1 Pl e.
- EIC 62061 SICcl2
- EIC 62061 SICcl3
- IEC 61508 SIL 3
The sensor’s long sensing range – up to 15 mm – provides a high tolerance to misalignment and
nuisance tripping in shock and vibration environments. The sensor can be used to monitor critical safety applications including valve position, escalator and elevator position, and robot home position.
Comparison of ifm inductive safety sensors vs. interlocking safety switches
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