Fibre optic transmitter and receiver for up to 8x 12V - 24V DC digital IO switching signals / control signals via fibre optic lines (Mulimode or singlemode optical fibre). Receiver: separate voltage-input for signal output with 500V DC isolation against operating voltage. Alternatively relay-output. ✔ input voltage Vin 12V..30V DC ✔ Extended operating temperature-range -40°..+70°C