Directed Electronics 3100 Instrucciones de operaciones descargar pdf (Pagina 26)

9 Functional safety

9.1 General

This safety manual applies to measuring systems consisting of

OPTISWITCH 3100 C vibrating level switches and integrated

oscillator VB60Z. The instrument corresponds to a subsystem

of type B.

The sensor software must correspond at least to version 1.03

or higher.

The measuring system can be used for level detection of

powders and granules which meet the speciﬁc requirements of

the safety technology, e.g.:

l Mode "max" for overﬁll protection

l Mode "min" for dry run protection

The measuring system is qualiﬁed in both modes to meet the

following requirement degree acc. to IEC 61508-2:

l SIL2 with architecture 1oo1D (single channel)

l SIL3 with architecture 1oo2D (double-channel/redundant)

With a special factory setting, the measuring system is also

suitable for detection of solids in water (see operating

instructions manual).

The safety function of this measuring system is the detection

and signalling of the condition of the vibration element. The

safe condition depends on the mode:

l In mode "max": condition "covered"

l In mode "min": condition "uncovered"

l IEC 61508-1,-2,-4

- Functional safety of electrical/electronic/programmable

electronic systems

The failure limit values for a safety function, depending on the

SIL class (of IEC 61508-1, 7.6.2)

Safety integrity level Low demand mode High demand mode

SIL PFD

avg

PFH

4 >=10

-5

up to < 10

-4

>=10

-9

up to < 10

-8

3 >=10

-4

up to <10

-3

>=10

-8

up to <10

-7

2 >=10

-3

up to <10

-2

>=10

-7

up to <10

-6

1 >=10

-2

up to < 10

-1

>=10

-6

up to < 10

-5

Validity

Area of application

Safety function

Relev ant standards

Safety requirements

26 OPTISWITCH 310 0 C - with two-wire output

Functional safety

29955-EN-060112

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 47 48

Comentarios a estos manuales

Sin comentarios

Directed Electronics 3100 Instrucciones de operaciones Pagina 26

Comentarios a estos manuales

Relacionado con productos y manuales para Alarma de carro Directed Electronics 3100