Position indicator e.g. potentiometer, evaluating device for safety switching device, has microcontrollers finding measuring quantities representative for indicator`s partial impedances, and having outputs assigned with high/low potential

摘要

The device has two microcontrollers (12, 14) to determine measuring quantities that are representative for partial impedances (40, 42) of a position indicator (32), respectively. The microcontrollers include two outputs (A p1, B p1) that are connected with two connectors (34, 36) of the indicators, respectively, where the outputs are alternately assigned with a high potential or a low potential. The controllers include inputs (A in, B in) that are connected with adjustable pickups (38) of the indicator. A switching unit is provided to separate the indicator from the outputs of the controllers. An independent claim is also included for a method for evaluation of a position indicator e.g. potentiometer.