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Issue 5 - September 2006
Page 53 of 65
9
Appendix 2 - Time Constraint Table (Low Demand of operation)
The following tables detail the actual time constraint time that is required for a certified system
dependant on the maximum number of Safety loop outputs (SIL level 1 to 3) used on a single
output module with.
9.1
Admissible Repair Times in hours for Low Demand Mode of Operation
Number of
Safety Loops
SIL 1
SIL 2
SIL 3
1
63718 20149 6372
2
58062 18361 5806
3
53686 16977 5369
4
50170 15865 5017
5
47266 14947 4727
6
44813 14171 4481
7
42707 13505 4271
8
40872 12925 4087
9
39256 12414 3926
10 37816
11959
3782
11 36525
11550
3652
12 35357
11181
3536
13 34295
10845
3429
14 33323
10538
3332
15 32429
10255
3243
16 31603
9994 3160
17 30838
9752 3084
18 30125
9526 3013
19 29460
9316 2946
20 28837
9119 2884
21 28252
8934 2825
22 27701
8760 2770
23 27181
8595 2718
24 26689
8440 2669
25 26223
8293 2622
26 25781
8153 2578
27 25360
8020 2536
28 24960
7893 2496
29 24577
7772 2458
30 24212
7657 2421
31 23863
7546 2386
32 23528
7440 2353