JUMO 701150 14597 safetyM STB/STW - Safety Temperature Limiter and Safety Temperature Monitor Operating Manual - Manual (Page 50)

6 Safety Manual 2014-05-01 50
M Motor Appendix I
MTTF Mean Time To Failure Appendix C
MTTF c Mean time to critical failure 3.1.25
MTTF d Mean time to dangerous failure
n, N, N Number of units 6.3, D.1
N low Number of SRP/CS with PL low in an SRP/CS combination 6.3
O, O1, O2, OTE Output device, e.g. drive unit 6.2
P, P1, P2 Possibility of avoiding the danger A.2.3
PES Programmable electronic system 3.1.22
PL Performance Level 3.1.23
PLC Programmable Logic Controller Appendix I
PL low Lowest Performance Level of a SRP/CS in an SRP/CS combination 6.3
PL f Required Performance Level 3.1.24
r a Demand rate 3.1.30
RS Rotary encoder Appendix I
S, S1, S2 Severity of violation A.2.1
SW1A, SW1B, SW1 Position switch Appendix I
SIL Safety Integrity Level Table 4
SK (Cat.) Category (B, 1, 2, 3, 4), structure as basis to achieve a certain PL
SRASW Safety-Related Application Software 4.6.3
Formula symbol or
abbreviation Description Definition
or location