Goodrive35 inverters Appendix A
294
Capacitance per unit length(pF/m)
Line-core cross-section (mm
2
)
Besides shielding twisted-pair copper wires, PROFIBUS/CANOPEN can also use optical
fiber for transmission in an electromagnetic interference environment to increase the
high-speed transmission distance there are two kinds of fiber optical conductors, one is
low-cost plastic fiber conductor, used distance is less than 50 meters, the other is glass fiber
conductor, and used distance is less than 1 kM.
A.2.6.5 PROFIBUS/CANOPEN bus connection diagram
Above is "terminal" wiring diagram. Cable is a standard PROFIBUS/CANOPEN cable
consisting of a twisted pair and shielding layer. The shielded layer of PROFIBUS/CANOPEN
cable on all nodes is directly grounded. Users can choose the best grounding method
according to the situation.
Note:
Make sure that signal lines do not twist when connecting all stations. Shielded cable should
be used when system runs under high electromagnetic interface environment, which can
improve electromagnetic compatibility (EMC).
If using shielded braided wire and shielding foil, both ends should be connected to ground.
Using shielding area should be large enough to maintain a good conductivity. And data lines
must be separated from high-voltage.
Stub line segment should not be used when transmission rate more than 500K bit/s, The
plug is available on the market which connects directly to data input and output cable. Bus
plug connection can be on or off at any time without interruption of data communications of
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