A WMT700 with no heating (0 W) or with heated transducers (30 W) takes the heating power directly from PMU701.
| Signal | Wire color | PMU701 connector pin | Wire color | Signal | |
|---|---|---|---|---|---|
| Heating − | Blue and red (join in one ferrule) | 10 | 5 | Gray/Pink | Ground |
| Heating + | Gray and pink (join in one ferrule) | 9 | 4 | Green | RX− |
| Power in + | White | 8 | 3 | White/Yellow | RX+ |
| Not connected | – | 7 | 2 | Yellow | TX− |
| COM1 and COM2 ground | Violet | 6 | 1 | Brown/Green | TX+ |