Limit signal indicator and method for operating a limit signal indicator

US8576086B2 · kind B2 · utility

Assignee

• SAMSON AKTIENGESELLSCHAFT · DE

Inventors

• Fausto Crespo Vidal · Langenselbold, DE
• Karl-Bernd Schaertner · Nidderau, DE
• Dirk Klee · Gerolzhofen, DE
• Thomas Karte · Lemgo, DE

Key dates

• Filing date: Mar 2, 2010
• Grant date: Nov 5, 2013
• Expiry date: Aug 28, 2031

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B15/2807
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

In a limit signal indicator for determining two positions of a pneumatically operated positioning device, a position sensor detects a position of the positioning device. A first signal transmission contact, a second signal transmission contact, and a microprocessor are provided. The first and the second signal transmission contacts each output a respective electrical limit position signal, the limit position signals representing an adoption of the first and the second positions or of at least one position of the positioning device above or below a predetermined set limit value. At least one of the signal transmission contacts is connected for signal transmission so that in case of a malfunctioning of a signal transmission, the switch amplifier is capable of generating an emergency signal above a maximum limit value or below a lower limit value, and to transmit the emergency signal to an external processing location. The microprocessor, upon detecting a specific operational malfunctioning, actuating the positioning device and executing an emergency procedure according to which the same emergency signal is generated and output at the second signal transmission contact.