Renishaw FORTiS-S FS, Installation Manual, Page: 5 / 16

5 www.renishaw.com
2 Functional Safety data declaration
Product identification
FORTiS-S FS and FORTiS-N FS variants with BiSS Safety and Siemens DRIVE-CLiQ serial interfaces
Safety integrity level 2
Failure rate data 2 readheads 3 readheads 4 readheads 5 readheads 6 readheads 7 readheads 8 readheads
Random hardware failures (per hour)
– BiSS Safety serial interface
l
S
= 4.59E-07
l
S
= 6.88E-07
l
S
= 9.17E-07
l
S
= 1.15E-06
l
S
= 1.38E-06
l
S
= 1.61E-06
l
S
= 1.84E-06
l
D
= 7.99E-07
l
D
= 1.20E-06
l
D
= 1.60E-06
l
D
= 2.00E-06
l
D
= 2.40E-06
l
D
= 2.80E-06
l
D
= 3.20E-06
l
DD
= 7.19E-07
l
DD
= 1.08E-06
l
DD
= 1.44E-06
l
DD
= 1.80E-06
l
DD
= 2.16E-06
l
DD
= 2.52E-06
l
DD
= 2.88E-06
l
DU
= 7.99E-08
l
DU
= 1.20E-07
l
DU
= 1.60E-07
l
DU
= 2.00E-07
l
DU
= 2.40E-07
l
DU
= 2.80E-07
l
DU
= 3.20E-07
Random hardware failures (per hour)
– Siemens DRIVE-CLiQ serial interface
l
S
= 6.75E-07
l
S
= 9.94E-07
l
S
= 1.32E-06
l
S
= 1.66E-06 Not permitted Not permitted Not permitted
l
D
= 1.19E-06
l
D
= 1.73E-06
l
D
= 2.31E-06
l
D
= 2.89E-06
l
DD
= 1.07E-06
l
DD
= 1.56E-06
l
DD
= 2.08E-06
l
DD
= 2.60E-06
l
DU
= 1.19E-07 l
DU
= 1.73E-07 l
DU
= 2.31E-07 l
DU
= 2.89E-07
PFH (per hour) – BiSS Safety serial interface
l
DU
= 7.99E-08
l
DU
= 1.20E-07
l
DU
= 1.60E-07
l
DU
= 2.00E-07
l
DU
= 2.40E-07
l
DU
= 2.80E-07
l
DU
= 3.20E-07
PFH (per hour) – Siemens DRIVE-CLiQ serial interface
l
DU
= 1.19E-07
l
DU
= 1.73E-07
l
DU
= 2.31E-07
l
DU
= 2.89E-07 Not permitted Not permitted Not permitted
PFD
avg
Not applicable due to continuous demand mode
Architectural constraints
Type
HFT
SFF
B
0
95%
Hardware safety integrity compliance Route 1H
Systematic safety integrity compliance
Route 1S
Systematic capability SC2
Demand mode
Continuous
Proof test interval Not required for continuous demand mode
Functional Safety data declaration for 2, 3, 4, 5, 6, 7 and 8 readheads
IEC 61508 safety data