Abstract: An electrical equipment includes a calculator or a data concentrator for connecting to a tachometer via a cable that includes a measurement wire and a test wire. The electrical equipment has a measurement input to which the measurement wire can be connected and a test input to which the test wire can be connected, measurement acquisition components connected to the measurement input and arranged to acquire an electrical measurement signal present on the measurement wire and produced by the tachometer, test acquisition components connected to the test input and arranged to detect whether the test wire is or is not open-circuit, and processor components arranged to detect a break of the measurement wire if the test wire is open-circuit.

Abstract: Electrical equipment of the type comprising calculation means or a data concentrator for connecting to a tachometer (2) via a cable (3) that comprises a measurement wire (36, 37) and a test wire (38), the electrical equipment having a measurement input (11, 12) to which the measurement wire can be connected and a test input (14) to which the test wire can be connected, measurement acquisition components (7) connected to the measurement input and arranged to acquire an electrical measurement signal present on the measurement wire and produced by the tachometer, test acquisition components (8) connected to the test input and arranged to detect whether the test wire is or is not open-circuit, and processor components (9) arranged to detect a break of the measurement wire if the test wire is open-circuit.

Abstract: An engine-control computer including switches wherein switch voltage type outputs are configured to control some actuators and a device for detecting internal or external failures with respect to the computer including: a circuit for acquisition of current flowing in such a switch; a circuit for acquisition of an input voltage of the switch; a circuit for acquisition of an output voltage of the switch; an electrical monitoring circuit wherein the three inputs are connected respectively to outputs of each of the three circuits, which tests current and voltage level, delivers an invalid status if the current is less than a defined limit current and if the voltage is less than a defined threshold voltage and configured to detect an external failure with respect to the computer. A method detects failures of such a computer.

Abstract: An engine-control computer including switches wherein switch voltage type outputs are configured to control some actuators and a device for detecting internal or external failures with respect to the computer including: a circuit for acquisition of current flowing in such a switch; a circuit for acquisition of an input voltage of the switch; a circuit for acquisition of an output voltage of the switch; an electrical monitoring circuit wherein the three inputs are connected respectively to outputs of each of the three circuits, which tests current and voltage level, delivers an invalid status if the current is less than a defined limit current and if the voltage is less than a defined threshold voltage and configured to detect an external failure with respect to the computer. A method detects failures of such a computer.