| 摘要 |
A relay (141; 241; 341) includes a first terminal (A1), a second terminal (A2), a third terminal (X1), a fourth terminal (X2), separable contacts (10) electrically connected between the first and second terminals, an actuator coil comprising a first winding (6) and a second winding (8;150), the first winding electrically connected between the third and fourth terminals, the second winding electrically connected between the third and fourth terminals, a processor (142), an output (154), a first voltage sensing circuit (20; 50; 60; 90; 110) cooperating with the processor to determine a first voltage between the first and second terminals, and a second voltage sensing circuit (20; 50; 60; 90; 110) cooperating with the processor to determine a second voltage between the third and fourth terminals. The processor determines that the separable contacts are closed when the first voltage does not exceed a first predetermined value and the second voltage exceeds a second predetermined value and responsively outputs a corresponding status to the output. |
