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3500/40M 140734-01 The following values were calculated by TÜV Rheinland of North America forthe 3500/32M and

3500/33.

The review of the SFF (safe failure fraction)requirements in reference to IEC 61508, parts 1-7:2010

has shown that the Relay Controller Module 3500/40M 140734-01 achieves 60% to <90% and the Relay I/O Module

when used in the 1oo1 configuration shown in Figure 4-2 is <60%.

PFDAVG = 2.7 E -3 , with the following assumptions:

l 1 year proof test interval

l MTTR = 168 hours

brand	Product Name	Product model	Order No
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Europe and America	Nationwide and overseas	yes	a year
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Xiamen	Shunfeng Express	Commissioning and installation	Power Plant Steel Plant Cement Plant Shipboard Papermaking
Service advantages	Foreign import, goods preparation and supply	Reasonable price and reliable quality	Pictures are for reference only
Product features	Primary source of goods, supply by model	After sales guarantee	Chen 1806092-3929

3500/40M 140734-01 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 4-3.

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

requirements of IEC 61508, parts 1-7:2010. Component failure rates were based from SN 29500,

with a maximum temperature of 65°C.

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) as shown in figure 4-3.

l Average Probability of a dangerous 3500/40M 140734-01 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, and a Relay Output Modules

are Type B safety related elements with a Safe Failure 3500/40M 140734-01 Fraction (SFF) of >90%, with a

Hardware Fault Tolerance (HFT) of 0.

l The 3500/32M_SIL and 3500/33_SIL Relay Output Modules are Type A safety related

elements with a Safe Failure Fraction (SFF) of <60%, with a Hardware Fault Tolerance (HFT)

of 1 when used in a 1oo2 configuration. The signal path of an individualrelay channel

contained on the Relay Output Module is a Type A safety related element with a β D =5%,

and β =10%

l 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.

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Bently 3500/40M spare 140734-01 front display

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