Analog Signal Input Circuit with a Number of Analog Signal Detection Channels

An analog signal input circuit with a first number of analog signal detection channels (100;

• 100′) and at least one diagnostics circuit (130;
• 130′), with
• each analog signal detection channel (100;
• 100′) being formed, to detect analog input signals applied at a second number of at least two analog signal inputs (201, 202;
• 201′, 202′) and in response issue output signals for the detected input signals;
• each analog signal detection channel (100;
• 100′) respectively showing a third number of analog signal detection circuits (110, 120;
• 110′, 120′) and at least one first connection selection device (115, 125);
• with the third number amounting to at least three and being maximally greater by one than the second number;
• each analog signal detection circuit (110, 120;
• 110′, 120′) comprising a first connection device (111, 121) and a second connection device (112, 122);
• each of the analog signal detection circuits (110, 120;
• 110′, 120′) of an analog signal detection channel (100;
• 100′) with its first connection device (111, 121) is able to be connected to respectively one analog signal input from the second number of analog signal inputs (201, 202;
• 201′, 202′) for detecting an analog input signal, with it being possible to connect each of the analog signal detection circuits (110, 120;
• 110′ 120′) of an analog signal detection channel (100;
• 100′) with its first connection device (111, 121) to the same analog signal input of the second number of analog signal inputs (201, 202;
• 201′, 202′) for detecting an analog input signal, at least successively, and all of the third number of analog signal detection circuits (110, 120, 110′, 120′) of an analog signal detection channel (100;
• 100′) being embodied, to issue at their second connection devices (112, 122) matching output signals, responding to detected, matching analog input signals;
• one analog signal detection circuit is selected alternatingly for a certain period of time for each analog signal detection channel (100;
• 100′) for detecting analog signal input signals applied at signal inputs of the second number of analog signal inputs and for the respective output of output signals in response to the detected analog input signals, not connected to its first connection device with an analog signal input for detecting an analog input signal, but used for test and/or diagnostic purposes, and all except for this one being selected from the third number of included analog signal detection circuits (110, 120;
• 110′, 120′), each for this certain period of time, to be connected to the first connection devices with certain analog signal inputs of the second number of analog signal inputs for detecting analog input signals, and issuing at their second connection devices as output signals the output signals of the analog signal detection channel, responding to the detected analog input signals, with the first connection selection device (115, 125) being embodied for the purpose of connecting the respectively first connection devices (111, 121) of all included analog signal detection circuits (110, 120;
• 110′, 120′) in response to the selection to either a certain analog signal input to be connected or to the diagnostics circuit.