JUMO 14597 safetyM STB/STW Ex - Safety Temperature Limiter and Safety Temperature Monitor Operating Manual - Manual (Page 55)

6 Safety Manual
49 2013-04-01
K1A, K1B Contactors Appendix I
L, L1, L2 Logic 6.2
LVL Programming language with limited language range 3.1.34
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 an 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
Table 10: Terms and abbreviations according to DIN EN ISO 13849
Formula symbol or
abbreviation
Description Definition
or location