AUMA FQM 05.1 - Safe Inputs and Outputs

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Safe ESD OPEN/CLOSE: safe OPENING/CLOSING)
- Fail safe position: Fail safe unit operates in the defined operating time into
the configured fail safe position (OPEN/CLOSED).
- Safe state is reached if the FQM has operated the mounted valve into the
defined safety end position (OPEN/CLOSED) or the safe state is main-
tained by the FQM.
- The safety end position is reached if the FQM has reached the internal
end stop or the valve end stop at the defined position (OPEN/CLOSED).
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Safe end position feedback
- Fail safe position: Depending on the application, the fail safe position can
differ. Consequently, no true fail safe position can be specified. An unex-
pected limit switch signal can present a potential danger.
For “safe end position feedback”, an incorrect end position might be signalled during
and shortly after switching (up to approx. 1 ms). Suitable measures for debouncing
the respective signal must be provided.
Depending on the configuration, the safe ESD function can be triggered either by a
signal (ESD input = 0 V DC) or by mains failure.
The different configuration options of the safety functions are described in the
<Configuration (setting)/version> chapter.
It is not possible to interrupt the execution of the safety function “Safe
OPENING/CLOSING”.
“Safe OPENING/CLOSING” safety function is only available if the “FS ready” signal
is present. Demand of the safety function leads to the removal of the “FS ready”
signal. For the signal behaviour of the FS ready NO/FS failure NC outputs,
please refer to page 16, Installation.
The operating time for the fail safe unit is defined for a load according to EN15714-2
for a 90° swing angle. Deviating loads or changing swing angles requires new
operating time determination.
In case the actuator causes a fault leading to an operation in opposite direction to
the fail safe direction, it is likely that the fail safe operating time is extended by the
actuator travel time.
Availability of the “Safe end position feedback” safety function is independent from
the “FS ready” signal.
“Safe end position feedback” and “Safe OPENING/CLOSING” safety functions are
simultaneously available.
In each fail safe unit, only one of the “Safe OPENING” and “Safe CLOSING” safety
functions is available.
4.3. Safe inputs and outputs
Safe input for safe OPENING/CLOSING (Safe ESD function):
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ESD
Safe outputs:
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FS failure NC (safety function ready/not ready)
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FS ready NO (safety function ready/not ready)
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LSO 38-20=NC (safe end position feed back OPEN)
-> May only be used for FQM fail safe units of variant 2 (➭ page 6, Valid device
types
LSO 19-21=NO (safe end position feed back OPEN)
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LSC 35-23=NC (safe end position feed back CLOSED)
-> May only be used for FQM fail safe units of variant 2 (➭ page 6, Valid device
types
LSC 22-24=NO (safe end position feed back CLOSED)
Further information on safe inputs and outputs:
➭ page 8, Configuration (setting)/version
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Safety instrumented system and safety functions with non safety-related actuators