Festo VIFB-21 Series Brief Description page 16

3.2 Pin assignment in the rugged−line plug
incoming fibre optic cable
OUT = Send data
core colour black
IN = Receive data
core colour orange
Meaning of the LED displays
See Electronics manual.
16
Pin assignment
OUT
IN
continuing fibre optic cable
OUT
OUT = Send data
core colour orange
IN = Receive data
core colour black
Festo VIFB21−03−−... 0808c English
IN