Det-Tronics EQP Fire and Gas Detection/Releasing System SAFETY MANUAL User Manual
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5.1
95-8599
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System Response Time
The EQP Safety System will have a typical response
time of less than 1 second, to which must be added
the response time of the final elements to give the total
response time.
The worst case theoretical response time of the EQP
Safety System, the time taken from an input transition
being detected to an output being asserted, is
estimated by the following:
• Detection at field device to the Controller over
EQPSL network
– Small system <100 field devices < 3.2 seconds
(user logic constrained to 0.5 seconds)
– Large system >100 field devices < 9.1 seconds
(user logic constrained to 1.5 seconds).
• Worst case response times assume user logic
execution time is constrained to
– Small system < 0.5 seconds
– Large system < 1.5 seconds.
• Worst case Controller to EDIO output < 6.3 seconds.
• Worst case response times assume a high level of
lost messages due to internal or external influences,
and three subsequent retries.
nOTE
the worst case theoretical response time, as
required by IeC 61508, will only occur once per
1,000,000 trips. It must occur during the worst
case degraded communication conditions
possible without generating a communication fault.
Note
the process safety time must be compared with
the response time of the entire safety function. In
addition to the response time of the eQP Safety
System, the response time of the input sensors and
output actuators must be included.
Product Repair
The EQP Controller and Field Devices are not field-
repairable and any internal device repairs must be
conducted at the factory. No firmware changes are
permitted or authorized. All failures indicated by
internal diagnostics or Proof Tests that cannot be
resolved through the troubleshooting and maintenance
procedures described in the manual must be reported
to the manufacturer. Refer to the DEVICE REPAIR AND
RETURN section of the EQP system instruction manual,
number 95-8533.
Spare Parts
Refer to the REPLACEMENT PARTS section of the
instruction manual. Safety certification is based on a
sufficient number of spares to achieve a 24 hour mean
time to repair.
Applicable Standards
• IEC 61508:2000. “Functional Safety of Electrical/
Electronic/Programmable Electronic Safety-related
Systems”.
• IEC 61511:2003. “Functional Safety - Safety
Instrumented Systems for the Process Sector”.
Product Certifications
FM
APPROVED
®
FM, CSA, ATEX, IECEx, CE, exida, and others.
FMEDA Report available.
For complete information regarding performance,
installation, operation, maintenance and specifications
of the Eagle Quantum Premier system, refer to
instruction manual 95-8533.