Siemens Aktiengesellschaft

Gunter Griessbach

Michael Abert

Michael Bräunlich

Gerald Hirmer

Arnold Klamm

Enrico Ramm

Bernhard Weissbach

Matthias Metzler

Werner Engl

Hans-Jürgen Beyer

Dirk Schmidt

Michael Chowaniec

Gunter Langer

Hagen Böhme

Daniela Rochlitzer

Michael Kuhn

A modular electrical system including a first current-emitting source module and a first current-consuming sink module which is connected to the first current-emitting source module is provided. The first sink module has a first sink identification means to identify maximum power requirement of the first sink module. The object of providing power balancing between a first source module and a first sink module is achieved in that the first source module has a first source identification means for identifying the power capacity of the first source module, wherein in order to calculate a power ratio of the system the first sink identification means and the first source identification means are connected to a two-wire line for the purpose of generating a differential voltage.

Modular electrical system and method for its operation

A PLC includes a first and second module. The first module having terminal positions and/or connectors behind a door located on its front side as well as having a display, and with the second module having a display unit. For servicing the first module, status messages for terminal position and/or connector of the first module are transmitted via a communication link to the second module and are displayed by a display of the second module.

Support for service activities at a programmable logic controller (PLC)

An output clock-pulse with a variable pulse duty factor is generated from a basic clock pulse that is supplied to a pulse contractor for generating pulses that are synchronized to the clock pulse. The resulting pulses are supplied to a circuit for varying the pulse duty factor corresponding to a ratio between the high-level and low-level of a period of the output clock-pulse.

Method for generating an output clock-pulse and a corresponding clock-pulse generation circuit

A switching unit is provided in order to operate in each case one bus master from a group of redundant bus masters on a fundamentally non-redundant bus system, with the special feature of the switching unit being that it is itself operated on the bus to be switched and, in consequence, no special signals are required to switch the bus masters.

Bus master switching unit

Growing community of inventors

Gelenau, Germany

Gunter Griessbach