Analog signal input circuit to process analog input signals for the safety of a process

US9658267B2 · kind B2 · utility

Assignee

• PHOENIX CONTACT GMBH & CO. KG · DE

Inventors

• Viktor Oster · Blomberg, DE
• Hubertus Lohre · Steinheim, DE

Key dates

• Filing date: May 16, 2013
• Grant date: May 23, 2017
• Expiry date: Nov 22, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03M1/12
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

An analog signal input circuit with a first number of analog signal detection channels and a diagnostics circuit, with each analog signal detection channel including a third number of analog signal detection circuits and a first connection selection device, and each analog signal detection circuit comprising a first connection device and a second connection device. For each analog signal detection channel, for detecting analog input signals applied at analog signal inputs from a second number of analog signal inputs, and for the respective issuance of output signals for the detected analog input signals, respectively one analog signal detection circuit is alternatingly selected for a certain period of time, not connected to its first connection device comprising an analog signal input for detecting an analog input signal, but used for testing and/or diagnostic purposes.