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Sr. Application Engineer Dawn Etta explains pulse echo products and demonstrates serial diagnostic coverage.
Schmersal has developed and patented a proprietary technology known as Pulse-Echo. Sensors with this technology will evaluate the predetermined frequency of the actuator which is emitted after it has been triggered by an electromagnetic pulse. This operating principle allows for a non-contact actuation.
Because of an integrated dual monitoring microprocessor, only one switch is required to meet PLe per ISO 13849-1 and SIL3 per IEC 62061. These models can be wired in series with up to 31 devices without degradation to the safety levels. In addition to the LED visualization located on the switch to indicate operating statuses and errors, each switch has a diagnostic cable with the option of communicating its status via serial data packages.