Input components and method for recognising errors

摘要

The module (1) has input channels (2a, 2b) i.e. potential dividers (4a, 4b), attached to multiplexers (5a, 5b). The multiplexer (5a) is connected with two analog-digital converters (6a, 6b) such that a measuring signal (3a) lies at the converters as digitized input values, respectively, where switches (S1-S6) e.g. transistors, of the multiplexer (5a) are connected to determine the signal. Longitudinal resistors (8) forming a difference between the input values are arranged between the channels and the converters. A microcontroller (9) is connected with the converters to compare the values. An independent claim is also included for a method for recognizing errors in an input module for acquisition of analog measuring signals.