Termination Network - rotork Mk3 Technical Manual

Foundation Fieldbus CP Option Card Technical Manual
4.3

Termination network

Each highway must be terminated correctly at the two ends of the data highway. The terminator
comprises at least one resistor and capacitor in series and they provide a characteristic impedance of
100 Ohm at 39 kHz. They need not be placed on the absolute ends of the highway but should be on
the ends of the main trunk section. They are usually incorporated inside the field junction box.
There are no highway termination facilities inside the actuator itself.
26 of 116 Publication PUB089-005-00_0618