19
51-650 Model 961/962 Echotel SIL Safety Manual
7.0
Appendices
7.1
SIL Summary
The Echotel® Model 961/962 random capability informa-
tion is summarized in Tables 6 and 7. FIT = Failure in Time
(1
×
10E
-9
failures per hour).
Product
Model 961
Dry is Safe
Model 961
Wet is Safe
Model 962
Dry is Safe
Model 962
Wet is Safe
SIL Architechture
Constraint (2H)
SIL 2 @ HFT=0
SIL 3 @ HFT=1
SIL 2 @ HFT=0
SIL 3 @ HFT=1
SIL 2 @ HFT=0
SIL 3 @ HFT=1
SIL 2 @ HFT=0
SIL 3 @ HFT=1
Device Type
B
B
B
B
λ
sd
263 FITS
15 FITS
451 FITS
24 FITS
λ
su
199 FITS
178 FITS
226 FITS
186 FITS
λ
dd
28 FITS
275 FITS
39 FITS
466 FITS
λ
du
55 FITS
76 FITS
60 FITS
96 FITS
Table 6
Relay Output Version
Product
Model 961
Dry is Safe
Model 961
Wet is Safe
Model 962
Dry is Safe
Model 962
Wet is Safe
SIL Architechture
Constraint (2H)
SIL 2 @ HFT=0
SIL 3 @ HFT=1
SIL 2 @ HFT=0
SIL 3 @ HFT=1
SIL 2 @ HFT=0
SIL 3 @ HFT=1
SIL 2 @ HFT=0
SIL 3 @ HFT=1
Device Type
B
B
B
B
λ
sd
0 FITS
0 FITS
0 FITS
0 FITS
λ
su
38 FITS
20 FITS
64 FITS
26 FITS
λ
dd
234 FITS
234 FITS
426 FITS
426 FITS
λ
du
10 FITS
27 FITS
10 FITS
27 FITS
Table 7
Loop Version