If the protection relay is provided with the optional communication module with light sensor inputs, the pre-manufactured lens-sensor fibers are connected to inputs X13, X14 and X15. See the connection diagrams.For further information, see arc protection.
Note: The protection relay is provided with connection sockets X13, X14 and X15 only if the optional communication module with light sensor inputs has been installed. If the arc protection option is selected when ordering a protection relay, the light sensor inputs are included in the communication module.
| Terminal | Description |
|---|---|
| X13 | Input Light sensor 1 |
| X14 | Input Light sensor 2 |
| X15 | Input Light sensor 3 |