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Safety Manual
4.4
Safe parameterisation
The user is responsible for verifying the correctness of the configuration
parameters. (See section 14 Safe parameterisation - user responsibility).
Manual override may not be used for safety applications.
4.5
installation in hazardous areas
The IECex Installation drawing, ATEX Installation drawing and FM
Installation drawing shall be followed if the products are installed in
hazardous areas.
5. functional specification of the safety functions
Pulse isolator as well as supply of NAMUR sensors and mechanical switches with
cable error detection installed in the hazardous area. Cable error detection only
works with NAMUR sensors or with the use of external resistors R s and R p . See
connections diagram at page 13 (switch, cable fault) .
6. functional specification of the non-safety functions
The status relay (terminal 33 and 34), error signal on power rail (terminal 91) and
LED outputs are not suitable for use in any Safety Instrumented Function.
7. Safety parameters
Probability of dangerous Failure per Hour (PFH)
Probability of failure on demand (PFD) -
1 year proof test interval
Proof test interval (10% of loop PFD)
Safe Failure Fraction
Demand response time, opto output
Demand response time, relay output
Demand mode
Demand rate
Mean Time To Repair (MTTR)
Diagnostic test interval
Hardware Fault Tolerance (HFT)
Component Type
SIL capability
Description of the "Safe State", opto output
Description of the "Safe State", relay output
Relay lifetime (Note
4
9202 Pulse Isolator
2
)
Version No. V5R0
Relay
Opto
4.66E-8
3.62E-8
Note
1
, Note
2
2.04E-4
1.58E-4
4 years
5 years
90%
91%
<125 µs
<10 m s
High
1000 s
8 hours
10 seconds
0
B
SIL 2
High impedance
De-energised
100 000 times
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