GE RSTi-EP - Chapter 2 Safety; 2.1 General Safety Notice

Chapter 7. Detailed Descriptions of EP-19xx Modules
20 RSTi-EP Functional Safety Manual GFK-2956A
5.3.3 Specifications EP-1901
Specifications
System data
Data
Process and diagnostic data depend on the network adapter used
(refer to the table in the section, Data Width of EP-19xx Modules)
Interface
RSTi-EP System bus
System bus transfer rate
48 Mbps
Safety-related data per EN ISO 13849 (Regarding the entire safety chain)
Achievable safety level
PLe and Category 4
DC (Diagnostic Coverage)
99%
MTTFd (Mean Time To Failure dangerous)
> 100 years
Safety-related data per EN 62061 (Regard the entire safety chain)
Achievable safety level
SILCL3
PFH (Probability of Failure per Hour in 1/h)
6.27 x 10
-9
Fault reaction time
10 s
Safety-related data per EN 61508 (Regard the entire safety chain)
Achievable safety level
SIL3
PFH (Probability of Failure per Hour in 1/h)
6.27 x 10
-9
HFT (Hardware Fault Tolerance)
1
SSF (Safe Failure Fraction)
98.58%
Presumed lifecycle time
20 years
Prooftest interval
No prooftest needed within the life cycle
Classification acc. To EN 61508-2:2010
Type B
Inputs
Safety inputs
1 x 2 channel
Input type
Type 3 as per IEC 61131-2
Inputs for start function
2 (manual start and autostart)
Input type
Type 3 as per IEC 61131-2
Outputs
Safety output (OSSD)
1
Output current
8 A (not for capacitive load)
Overload protection
excess temperature proof and overload-proof, short circuit proof
with external fuse
Turn-off time
< 20 ms
Turn-on time
< 2 s
Auxiliary outputs
2 x 2
Output current
max. 10 A (only to support the inputs dedicated inputs)