LVDT (Linear Variable Differential Transformer) position sensors use 5-wire connections: primary excitation AC and four secondary output wires forming a differential pair that changes with core displacement.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | PRI+ | Primary excitation positive | PWR |
| 2 | PRI- | Primary excitation negative | PWR |
| 3 | SEC1+ | Secondary 1 positive | ADC |
| 4 | SEC1- | Secondary 1 negative | ADC |
| 5 | SEC2 | Secondary 2 (some designs) | ADC |