828-829 / 973
a CSA International company
FMEA of the (close/open)
Circuit type A
No. Values
Description
Compon
ent
Failure
Rate (λs)
Failure
modes
factors /
open
Failure modes
types / short
Qty of
compts
Criticality
safe=S
danger=D
no-efct=N
open
Diagnostic
Detect=Y
Undet=N
Redunda
ncy ?
Criticality
safe=S
danger=D
no-efct=N
short
Diagnostic
Detect=Y
Undet=N
IEC61508
Annex A
Diagnostic
Value
Safe
Rev'led
Safe
Un-rvld
Dangrs
Detect
Dangrs
Un-detec
Safe
Rev'led
Safe
Un-rvld
Dangrs
Detect
Dangrs
Un-detec
Safe No-
effect
SOLENOID CONTROL BOARD
1
R1
Resistor
0.00041
0.9
0.1
1
s
no
No
d
No
no diagnostics
0
0.00037
0
0
0
0
0
4.1E-05
0
2
R2
Resistor
0.00041
0.9
0.1
1
d
no
No
s
No
no diagnostics
0
0
0
0.00037
0
4.1E-05
0
0
0
13
C1
Capacitor
0.0005
0.2
0.8
1
d
no
No
s
No
no diagnostics
0
0
0
0.0001
0
0.0004
0
0
0
14
D4
Diode
0.0012
0.8
0.2
1
s
no
No
d
No
no diagnostics
0
0.00096
0
0
0
0
0
0.00024
0
15
D5
Diode
0.0012
0.8
0.2
1
s
no
No
d
No
no diagnostics
0
0.00096
0
0
0
0
0
0.00024
0
16
Q1
MOSFET - N CHANNEL
0.0031
0.2
0.8
1
s
no
No
d
No
no diagnostics
0
0.00062
0
0
0
0
0
0.00248
0
20
Q5
MOSFET - N CHANNEL
0.0031
0.2
0.8
1
d
no
No
d
No
no diagnostics
0
0
0
0.00062
0
0
0
0.00248
0
23
IC4
BUFFER IC4A I/P
0.0086
0.033
open
1
n
no
No
n
No
no diagnostics
0
0
0
0
0
0
0
0
0.00888
0.0086
0.033
short to +
1
n
no
No
n
No
no diagnostics
0
0
0
0
0
0
0
0
0.00888
0.0086
0.033
short to -
1
n
no
No
n
No
no diagnostics
0
0
0
0
0
0
0
0
0.00888
0.0086
0.033
short to pin
above
1
n
no
No
n
No
no diagnostics
0
0
0
0
0
0
0
0
0.00888
0.0086
0.033
short to pin
below
1
n
no
No
n
No
no diagnostics
0
0
0
0
0
0
0
0
0.00888
24
IC4
BUFFER IC4B O/P
0.0086
0.033
open
1
d
no
No
n
No
no diagnostics
0
0
0
0.00028
0
0
0
0
0.0086
0.0086
0.033
short to +
1
d
no
No
n
No
no diagnostics
0
0
0
0.00028
0
0
0
0
0.0086
0.0086
0.033
short to -
1
d
no
No
n
No
no diagnostics
0
0
0
0.00028
0
0
0
0
0.0086
0.0086
0.033
short to pin
above
1
n
no
No
n
No
no diagnostics
0
0
0
0
0
0
0
0
0.00888
0.0086
0.033
short to pin
below
1
s
no
No
n
No
no diagnostics
0
0.00028
0
0
0
0
0
0
0.0086
31
IC3
COMPARATOR SINGLE 1V6-5V5 PUSH-PULL - 5 gnd
0.0069
0.04
open
1
d
no
No
n
No
no diagnostics
0
0
0
0.00028
0
0
0
0
0.0069
0.0069
0.04
short to +
1
d
no
No
n
No
no diagnostics
0
0
0
0.00028
0
0
0
0
0.0069
0.0069
0.04
short to -
1
n
no
No
n
No
no diagnostics
0
0
0
0
0
0
0
0
0.00718
0.0069
0.04
short to pin
above
1
d
no
No
n
No
no diagnostics
0
0
0
0.00028
0
0
0
0
0.0069
0.0069
0.04
short to pin
below
1
n
no
No
n
No
no diagnostics
0
0
0
0
0
0
0
0
0.00718
32
IC2
74LVC2G00 DUAL TWO INPUT NAND - 1 I/P1
0.005
0.025
open
1
d
no
No
n
No
no diagnostics
0
0
0
0.00013
0
0
0
0
0.005
0.005
0.025
short to +
1
s
no
No
n
No
no diagnostics
0
0.00013
0
0
0
0
0
0
0.005
0.005
0.025
short to -
1
d
no
No
n
No
no diagnostics
0
0
0
0.00013
0
0
0
0
0.005
0.005
0.025
short to pin
above
1
n
no
No
n
No
no diagnostics
0
0
0
0
0
0
0
0
0.00513
0.005
0.025
short to pin
below
1
d
no
No
n
No
no diagnostics
0
0
0
0.00013
0
0
0
0
0.005
0.005
0.025
short to pin
below
1
n
no
No
n
No
no diagnostics
0
0
0
0
0
0
0
0
0.00513
40
IC1
Inverter I/P 1
0.00654 0.033
open
1
d
no
No
n
No
no diagnostics
0
0
0
0.00022
0
0
0
0
0.00654
45
IC1
Inverter GND
0.00654 0.033
open
1
d
no
No
n
No
no diagnostics
0
0
0
0.00022
0
0
0
0
0.00654
0.00654 0.033
short to +
1
d
no
No
n
No
no diagnostics
0
0
0
0.00022
0
0
0
0
0.00654
0.00654 0.033
short to -
1
n
no
No
n
No
no diagnostics
0
0
0
0
0
0
0
0
0.00676
0.00654 0.033
short to pin
above
1
d
no
No
n
No
no diagnostics
0
0
0
0.00022
0
0
0
0
0.00654
0.00654 0.033
short to pin
below
1
n
no
No
n
No
no diagnostics
0
0
0
0
0
0
0
0
0.00676
46
R8
Resistor
0.00041
0.9
0.1
1
d
no
No
n
No
no diagnostics
0
0
0
0.00037
0
0
0
0
0.00041
47
C2
Capacitor
0.0005
0.2
0.8
1
d
no
No
n
No
no diagnostics
0
0
0
0.0001
0
0
0
0
0.0005
No. Values
Description
Component Failure
Rate (λs)
Failure modes
factors / open
Failure modes types /
short
SOLENOID CONTROL BOARD
1
R1
Resis or
0.00041
0.9
0.1
2
R2
Resistor
0.00041
0.9
0.1
13
C1
Capaci or
0.0005
0.2
0.8
14
D4
Diode
0.0012
0.8
0.2
15
D5
Diode
0.0012
0.8
0.2
16
Q1
MOSFET - N CHANNEL
0.0031
0.2
0.8
20
Q5
MOSFET - N CHANNEL
0.0031
0.2
0.8
23
IC4
BUFFER IC4A I/P
0.0086
0.033
open
0.0086
0.033
short to +
0.0086
0.033
short to -
0.0086
0.033
short to pin above
0.0086
0.033
short to pin below
Criticality
safe=S
danger=D
no-efct=N open
Diagnostic
Detect=Y
Undet=N
Redundancy ?
Criticality
safe=S
danger=D
no-
efct=N short
Diagnostic
Detect=Y
Undet=N
IEC61508 Annex A
Diagnostic Value
s
no
No
d
No
no diagnostics
d
no
No
s
No
no diagnostics
d
no
No
s
No
no diagnostics
s
no
No
d
No
no diagnostics
s
no
No
d
No
no diagnostics
s
no
No
d
No
no diagnostics
d
no
No
d
No
no diagnostics
n
no
No
No
no diagnostics
n
no
No
No
no diagnostics
n
no
No
No
no diagnostics
n
no
No
n
No
no diagnostics
n
no
No
n
No
no diagnostics
Safe
Rev'led
Safe
Un-rvld
D ngrs
Detect
Dangrs
Un-detec
Safe
Rev'led
Safe
Un-rvld
Dangrs
etec
angrs
Un-detec
Safe No-
effect
0
0.00037
0
0
0
0
0
4.1E-05
0
0
0
0
0.00037
0
4.1E-05
0
0
0
0
0
0
0.0001
0
0.0004
0
0
0
0.00096
0
0
0
0
0
0.00024
0
0
0.00096
0
0
0
0
0
0.00024
0
0
0.00062
0
0
0
0
0.00248
0
0
0
0
0.00062
0
0
0.00248
0
0
0
0
0
0
0
0
0
0.00888
0
0
0
0
0
0
0
0
0.00888
0
0
0
0
0
0
0
0
0.00888
0
0
0
0
0
0
0
0
0.00888