JUMO 701150 14597 safetyM STB/STW - Safety Temperature Limiter and Safety Temperature Monitor Operating Manual - Manual (Page 53)

6 Safety Manual 53 2014-05-01
6.11.1 Calculations DIN EN ISO 13849-1 Performance Level - low voltage 230 V
6.11.2 Calculations DIN EN ISO 13849-1 Performance Level - extra low voltage (ELV) 24 V
Variant MTTF d DC avg CCF PL
1 100 years 3 (337 years) 90 % 80 PLd
1a 100 years 3 (337 years) 90 % 80 PLe
2 100 years 3 (340 years) 90 % 80 PLe
3 100 years 3 (317 years) 91 % 80 PLe
4 100 years 3 (313 years) 91 % 80 PLe
5 100 years 3 (327 years) 91 % 80 See above table
Variant MTTF d DC avg CCF PL
1 100 years 3 (336 years) 90 % 80 PLd
1a 100 years 3 (336 years) 90 % 80 PLe
2 100 years 3 (339 years) 90 % 80 PLe
3 100 years 3 (315 years) 90 % 80 PLe
4 100 years 3 (311 years) 90 % 80 PLe 3. The MTTF d value of a partial system must be
limited to 100 years according to the DIN EN
ISO 13849-1 requirements.
5 100 years 3 (318 years) 90 % 80 See above table