DIAGNOSTIC CIRCUIT FOR TESTING A CIRCUIT

摘要

A diagnostic circuit is configured for connecting to a unit under test that has a load and a sinusoidal source. The diagnostic circuit includes a voltage sensing device that has an input for sensing a signal, a first terminal for connecting to the load, a second terminal for connecting to the sinusoidal source, and a relay connected between the first and second terminals for connecting the sinusoidal source to the load. Clamping diodes are provide for clamping a sinusoidal signal and include a first clamping diode connected between a D/C voltage source and the input and a second clamping diode connected between ground and the input. A resistor is connected between the D/C voltage source and the first terminal. The diagnostic circuit verifies the operational functionality of the load, related wiring and connections.

主权项

1. A diagnostic circuit for connecting to a unit under test having at least two loads, the diagnostic circuit comprising:
terminals including a first terminal for connecting to a first load and a second terminal for connecting to a second load a voltage sensing device having an input for sensing a signal and coupled to said terminals; a D/C source and ground; a first resistor having a first end connected to said D/C source and a second end connected to said first terminal; and a second resistor having a first end connected to said D/C source and a second end connected to said second terminal.