Bentley 3500/40M 176449-01 3500/40 Proximitor Monitor Module

Description

3500/40M 176449-01 The calculation of the 3500/32M_SIL2 and 3500/33_SIL2 Relay Modules safety relevant

parameters has shown that the requirements of SIL 2 to 61508: 2010 are fulfilled in a redundant,

1oo2 configuration, as shown in Figure 4-5.

The component level FMEDA was carried out by TÜV Rheinland under consideration to the

requirements of IEC 61508, parts 1-7:2010. 3500/40M 176449-01 Component failure rates were based from SN 29500,

with a maximum temperature of 65°C.

3500/40M 176449-01 The safety related parameters are as follows:

l The relay channel must be configured for de-energize to trip.

l The safety-related circuit must be set up such that the opening of the relay contacts

activates the safety function (de-energize circuit to trip) 3500/40M 176449-01 as shown in figure 4-5.

l Average Probability of a dangerous failure on demand (PFD) < 10 E -2 .

l The 3500/32M_SIL and 3500/33_SIL modules are considered to be a system operating in a

low demand mode

l The 3500/32M_SIL and 3500/33_SIL modules have a hardware safety integrity route of 1H.

l The 3500/32M_SIL and 3500/33_SIL modules have a systematic safety Integrity route of 1S.

l The rated life time of the 3500/32M_SIL and 3500/33_SIL modules is 10 years.

l The 3500/32M_SIL and 3500/33_SIL Relay Controller Modules are Type B safety related

elements with a Safe Failure Fraction (SFF) of 60% to <90%. The Relay Controller Module has

a β D =5%, and β =10%.

l The 3500/32M_SIL and 3500/33_SIL Relay Output Modules are 3500/40M 176449-01 Type A safety related

elements with a Safe Failure Fraction (SFF) of <60%. The Relay Output Module has a β D =5%,

and β =10%.

l The 3500/32M_SIL and 3500/33_SIL modules have a Hardware Fault Tolerance (HFT) of 1

when used in a 1oo2 configuration.

l 3500/40M 176449-01 The MTTR and MRT forthe 3500/32M_SIL and 3500/33_SIL modules is 168 hours or 1

week**.

**MTTR and MRT were assigned as 168 hours forthe purposes of generating the PFDAVE

calculation. This figure may be adjusted to suit application specific considerations as long as the

specific value is also used to adjust the PFDAVE calculation specific to the safety-related

installation.

As shown in the 1oo2 safety block diagram, Figure 4-6, the 3500/32M and 3500/33 Relay

Controller Modules are classified as Type B devices, and the 3500/32 and 3500/33 Relay Output

Modules are Type A.

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