Choosing the right PROFIBUS cable
Choosing the right
PROFIBUS cable
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Is the application
PROFIBUS DP or PROFIBUS PA?
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My cable is purple, can I
use it?
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DP cable has a 150Ω impedance
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PA cable has a 100Ω impedance
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So what if my cable impedance
is wrong?
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PROFIBUS devices and their
terminations are designed to match specific impedance. Your data signal will degrade and your
waveforms will be malformed.
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Use a test tool like PROFIBUS
Troubleshooting Toolkit from PROCENTEC with built in scope function to check
your signals
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The T1 Pepper Active Terminator
matches can sort our any impedance mismatches
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