JUMO 701150 14597 safetyM STB/STW - Safety Temperature Limiter and Safety Temperature Monitor Operating Manual - Manual (Page 48)

6 Safety Manual 2014-05-01 48
6.10 Determining the achieved Performance Level PL
The following safety-related parameters are required to determine the Performance Level of components/devices:
As further parameters to be observed, operational aspects such as the demand rate and/or the test rate of the safety function
can also influence the resulting PL.
Excerpt from DIN EN ISO 13849-1:2008-12
6.10.1 Terms and abbreviations acc. to DIN EN ISO 13849
Planned operating duration 10 years
Architecture according to DIN EN ISO
13849-1
Sensor system, one-channel: Cat. 2 Sensor system, two-channel: Cat. 3
MTTF d -DC avg according to DIN EN
ISO 13849-1 table K.1
PL d:
≥
62 years DC avg
≥
60 % PL e:
≥
62 years DC avg
≥
90 %
Mode of operation and software
class according to DIN EN 14597
JUMO STB/STW 701150 possesses the following mode of operations
2B, 2D, 2F, 2K, 2J, 2V, 2N, 2P software class C
H This excerpt contains references to the complete standard DIN EN ISO 13849-1:2008-12, which are therefore not
reproduced in this chapter.
Formula symbol or
abbreviation Description Definition
or location
PL (a, b, c, d, e) Description for the Performance Level Table 3
Safety feature Requirement / comment