Turck's FOC series devices transmit intrinsically safe fieldbus telegrams via fibre optic cables over distances greater than 2500 meters.

Turck is presenting new optocouplers for transmitting fieldbus communication via fibre optic cable (FOC). The single or dual-channel devices of the FOC series transfer fieldbus protocols such as Profibus-DP or Modbus RTU as light signals along fibreoptic cables. The zone 1 IECEx variant of the FOC couplers is unique on the market as it can be installed in zone 1 and can transmit intrinsically safe signals in accordance with RS485IS.

The FOC media converters can cover large distances, more than 2500 meters, depending on the fibre optic cable used. FO cables are also immune to electromagnetic interference. Users can also configure ring topologies for maximum availability with the devices in addition to point-to-point connections. All devices are provided with a universal shielding concept which can be easily adapted to individual processes. The integrated alarm output of the FOC converters can considerably shorten the time required for troubleshooting.