Parker iqan-mc3 - Page 59

56
Failure modes
Appendix B
Instruction book, IQAN-MC3
On - active CRET
On - passive CRET
Failure mode Detected Comment
COUT open •
CRET open •
COUT short circuit to CRET (active) •
COUT short circuit to CRET (passive) No influence on function in this state.
COUT short circuit to +BAT • Reverse feed *.
No influence on function in this state.
COUT short circuit to -BAT •
CRET (active) short circuit to +BAT • Detection is limited to this output.
Reverse feed * is not detected.
CRET (active) short circuit to -BAT •
CRET+ short-circuit to CRET- •
COUT short-circuit to 2
nd
COUT
•
COUT short-circuit to 2
nd
DOUT
•
COUT short circuit to 2
nd
CRET/DRET
(active)
No influence on COUT (error detected
on 2
nd
COUT/DOUT).
COUT short circuit to 2
nd
CRET/DRET
(passive)
No influence on function in this state.
CRET short circuit to 2
nd
CRET (active)
•
CRET short circuit to 2
nd
CRET
(passive)
No influence on COUT (error detected
on 2
nd
COUT/DOUT).
Insufficient voltage on +BAT current saturated 75% to 100%.
Insufficient voltage on +BAT, current
saturated < 75%
•
Failure mode Detected Comment
CRET open •
CRET short circuit to +BAT Reverse feed *.
No influence on function in this state.
CRET short circuit to -BAT •
CRET short circuit to 2
nd
CRET
(passive)
No influence on function in this state.