Power supply for a redundant computer system in a control system

A power supply for a redundant computer system for a control system, having first and second computer units connected in parallel to said control system, said computer units perform mutual verification so that safety action can be exerted on said control system in case of malfunction, comprising,

• a self-monitoring power pack unit as a common power supply connected by a voltage distribution line and a signal path to said computer units, and connected to said control system by said voltage distribution line, wherein said self-monitoring power pack unit further comprises,
• a power pack, having a constant voltage regulator having a regulated voltage and a stabilization circuit for a distribution or supply voltage,
• an undervoltage monitor for monitoring said regulated voltage,
• an overvoltage monitor for monitoring said regulated voltage, and
• wherein said power pack and said monitors so that an autonomous safety action is exerted on said control system in case of an overvoltage or an undervoltage,
• wherein said overvoltage monitor further comprises an overvoltage test input, said undervoltage monitor further comprises an undervoltage monitor, and said self-monitoring power supply unit further comprise a means for transmitting test voltage signals simulating an overvoltage and an undervoltage to said overvoltage and undervoltage input, respectively.

A power supply for a redundant computer system for a control system, having first and second computer units connected in parallel to said control system, said computer units perform mutual verification so that safety action can be exerted on said control system in case of a malfunction, comprising,

• a self-monitoring power pack unit as a common power supply connected by a voltage distribution line and a signal path to said computer units, and connected to said control system by said voltage distribution line, wherein said self-monitoring power pack unit further comprises,
• a power pack, having a constant voltage regulator having a regulated voltage and a stabilization circuit for a distribution or supply voltage,
• an undervoltage monitor for monitoring said regulated voltage,
• an overvoltage monitor for monitoring said regulated voltage, and
• wherein said power pack and said monitors interact so that an autonomous safety action is exerted on said control system in case of an overvoltage or an undervoltage,
• and further comprising an acknowledgement circuit for detecting presence or absence of said distribution voltage for transmittal to said control system and for transmitting information pertaining to said absence or presence to at least one of said computer units.