Electrical equipment for connection to a tachometer

Electrical equipment of the type comprising calculation means or a data concentrator for connecting to a tachometer (2;

• 202;
• 302) via a cable (3;
• 203;
• 303) that comprises a measurement wire (36, 37;
• 318, 319) and a test wire (38;
• 205;
• 305, 306), the electrical equipment having a measurement input (11, 12) to which the measurement wire can be connected and a test input (14;
• 101, 102;
• 207;
• 311, 312) 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;
• 103;
• 208;
• 314) connected to the test input and arranged to detect whether the test wire is or is not open-circuit, and processor components (9;
• 212;
• 317) arranged to detect a break of the measurement wire if the test wire is open-circuit.