8-9
Earth fault search results
Overview There are several types of results that can display at the end of an Earth Fault Search. This
section covers all types of results.
IMPORTANT: Once you have been directed to an earth ground fault and corrected it, it is
recommended that you restart the system (warm- or cold-start).
Non-point faults A non-point fault indicates a ground that cannot be traced to an addressable point (for example,
a shield
).
Point Faults A point fault indicates a ground at a specific addressable point. Point faults can be found at any
point in the system that connects to field wiring.
Some IDNet channel point fault examples are illustrated below.
Fault not cleared. The message below shows that an IDNet channel that has been isolated for
fault detection still has the earth fault:
Fault between channel output and first isolator. The message below shows a fault between
the IDNet channel output and the first isolator on the line:
4009 IDNet NAC Extender/TrueAlert Addressable Controller faults. The message below
shows a fault detected on the 4009 IDNet NAC Extender before the repeater connected to that
circuit is turned on:
Conversely, the following example shows a fault detected after the repeater connected to that
circuit is turned on:
IDNet isolator fault. The message below shows a fault detected after the IDNet isolator was
turned on:
CARD 2, IDNET CARD (250 POINTS)
M1, EARTH FAULT SEARCH FAULT CLEAR FAIL
CARD 2, IDNET CARD (250 POINTS)
M1, CHANNEL OUTPUT EARTH FAULT
CARD 2, IDNET CARD (250 POINTS)
M1-18, 4009A NAC EARTH FAULT
CARD 2, IDNET CARD (250 POINTS)
M1-18, 4009A REPEATER EARTH FAULT
CARD 2, IDNET CARD (250 POINTS)
M1-3, IDNET ISOLATOR EARTH FAULT
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