53
Failure modes
Appendix B
Instruction book, IQAN-MC3
Frequency input
Directional frequency input
Failure mode
Detected
Comment
FIN open
Frequency 0 **
FIN short circuit to +BAT
Frequency 0 **
FIN short circuit to signal > high trigger
level *
Frequency 0 **
FIN short circuit to signal within low to
high trigger level range *
Undefined **
FIN short circuit to signal < low trigger
level *
Frequency 0
FIN short circuit to -BAT
Frequency 0 **
Failure mode
Detected
Comment
DFIN open
Frequency 0 **
DFIN short circuit to +BAT
Frequency 0 **
DFIN short circuit to signal > high trigger
level *
Frequency 0 **
DFIN short circuit to signal within low to
high trigger level range *
Undefined **
DFIN short circuit to signal < low trigger
level *
Frequency 0
DFIN short circuit to -BAT
Frequency 0 **
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