Phoenix Contact Inline (IB IL) is a modular I/O system with a proprietary backplane bus connecting DIN-rail mounted modules. The local bus carries data between the coupler and up to 63 I/O modules.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | U_BUS | Bus supply voltage | PWR |
| 2 | BUS+ | Local bus signal positive | BUS |
| 3 | BUS- | Local bus signal negative | BUS |
| 4 | GND | Ground | GND |