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11 connection possibilities of the sensors (pl), 6 safety manual – JUMO 701150 14597 safetyM STB/STW - Safety Temperature Limiter and Safety Temperature Monitor Operating Manual User Manual

Page 51

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6 Safety Manual

51

2014-05-01

6.11 Connection possibilities of the sensors (PL)

The JUMO safetyM STB/STW 701150 evaluation device structure is basically identical.

Various possibilities to connect the sensors are available. These possibilities are listed in the following table along with the

achievable PL level:

SRESW

Safety-Related Embedded Software

4.6.2

SRP

Safety-Related Part

General

SRP/CS

S

afety-Related Part of (a) Control System(s)

3.1.1

Sub-PL/Sub-SIL

PL or SIL at subsystem level. A subsystem 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.

Formula symbol or
abbreviation

Description

Definition
or location