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12 Glossary
ID
Miswire
Short
Split pair
PN1-Manual-EN.docx
A number that identifies the Remote Unit.
Wires are NOT connected to the correct pins at the other end of the cable.
The wire map shows the pin numbers line 1 (main) line 2 (remote). A reverse
pair is a special case of a miswire in which the pair is wired to the correct
pair of pins or to another designated pair of pins, but the two leads are
reversed. The Fail icon and the pin numbers, which are miswired, will be
blinking.
One of the wires has a low resistance connection from one wire of the pair to
the other wire of the pair or to any other wire in the cable or the shield.
A short is indicated by the Short icon being on and blinking + the appropriate
pin positions on the second line for the pin numbers involved in the shorts
plus a blinking S icon if the shield is shorted.
A split pair is an error in the twisting of the wires together within the cable.
The cables are made up of 4 or 8 wires twisted together in 2 or 4 pairs.
These pairs are designated as pairs by the wiring standards and are
intended to carry a signal and its return.
1 -2, 3-6, (4-5 and 7-8) are the pairs designated by T568A/B for an RJ45
jack or plug. A cable can be wired with correct continuity but not with correct
pairing. This most often happens when the cable is terminated consistently
at both ends, but in the wrong order. A dynamic or AC test is required to
detect this type of error. If the only error is a split pair error, the cable has
correct continuity. If cross talk is not a concern, as in flat satin cable, the
cable is good if the only error is the split pair error. The Split icon and the pin
numbers on the first and second line of the wire map with split pairs blinking
when there is a split pair error.
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Version 1.2 – 27 April 2009
PROFINET Cable Tester – User Manual
© PROCENTEC 2009 - Copyright - all rights reserved
Page 24 / 32
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