Pilz PSS SB NOT, Basic license - Manual (Page 105)

9-1 Modular Block System: Emergency Stop Circuits
Appendix
Assignment table: category and requirement class
In process engineering, safety requirements must conform to DIN V 19
250, 01/89 (Basic Safety Requirements for Measurement and Control
Protection Devices).
Requirement classes in accordance with DIN V 19 250, 01/89 may be
referred to the categories as per EN 954-1, 11/94.
Assignment as per requirements Assignment as per safety measures
Fig. 9-1: Assignment table
*1 This assignment cannot be definitive. It depends on the system and/or
product.
*2 Depending on the anticipated extent of damage, requirement class 1
may either be category 1 or may have no safety requirement.
Requirement
Class
DIN V 19 250
1
2
3
4
5
6
Category
VDI/VDE 2180
I
II
Safety Integrity
Level
IEC 1508
0
1
2
3
Category of
Control
EN 954-1
B
1
2
3
4
*1
*1
*1
*2