Vacon 100 - Page 24

5
vacon • 22 STO and SS1 safety functions
Tel. +358 (0) 201 2121 • Fax +358 (0)201 212 205
Safe Stop (SS1) safety-related data
NOTE! The following chapter is only an informative example of combining products.
The SS1 safety function consists of two subsystems with different safety-related data.The subsys-
tem consisting of the time delayed safety relay is manufactured, for example, by PHOENIX CON-
TACT. The following types are available from this manufacturer:
• PSR-SCP-24DC/ESD/5X1/1X2/300 or
• PSR-SPP-24DC/ESD/5X1/1X2/300
See manufacturer user manual for more information regarding the time delayed safety relay.
PSR-SC/PP-24DC/ESD/5X1/1X2/300 safety-
related data from user manual and certificate:
Vacon 100 STO safety-related data:
Subsystem
SafetyRelay
Subsystem
Vacon100STO
Safe Stop 1 (SS1) safety-related data:
When the two subsystems are combined, the maximum safety integrity level or performance level reached is
the level of the lower subsystem.
•SIL 2 and PL d
The PFH value for a safety function of combined subsystems is the sum of all subsystems PFH values.
PFH
SS1
= PFH
Safety Relay
+ PFH
VACON100 STO
= 1.89•10
-9
/hour + 2.52•10
-10
/hour = 2.14•10
-9
/hour
• The result is within the requirements for SIL 2 and PL d.
IEC 61 508
SIL 2
+
EN 61800-5-2
SIL 3
EN 62061
SIL CL 2
EN 62061
SIL CL 3
DIN EN/ISO 13849-1
PL d
Category 3
IEC 61508
SIL 3
PFH
1,89•10
-9
/hour
DIN EN/ISO 13849-1
PL e
Category 3
PFH
2,52•10
-10
/hour
EN 61800-5-2
SIL 2
EN 62061
SIL CL 2
IEC 61508
SIL 2
DIN EN/ISO 13849-1
PL d
Category 3
PFH
2,14•10
-9
/hour