JUMO 14597 safetyM STB/STW Ex - Safety Temperature Limiter and Safety Temperature Monitor Operating Manual - Manual (Page 56)

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6.11 Connection possibilities of the sensors (PL)
The JUMO safety
M STB/STW Ex evaluation unit is always structured in the same way. Various possibilities are available for
sensor connection. These possibilities are listed in the following table along with the achievable PL level:
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
SRESW Safety-Related Embedded Software 4.6.2
SRP Safety-Related Part General
SRP/CS
Safety-Related Part of (a) Control System(s)
3.1.1
Sub-PL/Sub-SIL PL or SIL at subsystem level. A subsystem is a system that – based on a subtask
– already adequately performs a safety function (for example, an input module
that reliably records the inputs).
TE Test facilities 6.2
T
M
Functional life 3.1.28
T
M
Functional life, designated
Mission Time
T
10d
value Reference value for a preventative exchange (10 % of the B10d value). At this val-
ue, a dangerous failure has already occurred for approx. 63 % of all components.
In this case, the standard DIN EN ISO 13849-1:12006 recommends replacement.
Table 10: Terms and abbreviations according to DIN EN ISO 13849
Formula symbol or
abbreviation
Description Definition
or location