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The safety-related signal input is appropriately assigned to check the safety-related function.
As a consequence, the actuator has to perform the safety function. For a detailed description
of the proof test steps refer to the following sections.
Intervals:
A proof test interval describes the time between two proof tests. Functionality must be
checked at appropriate intervals. The intervals are to be defined by the plant operator. Safety-
related figures depend on the selected proof test interval; in our example, they are valid for
T = 1 year (refer to <Safety-related figures> chapter).
proof
In any case, the safety-related functions must be checked after commissioning and following
any maintenance work or repair as well as during the T intervals defined in safety
proof
assessment.
If a fault occurs during proof test, safe function has to be ensured introducing alternative
actions. Please contact AUMA.
The type of proof test to be performed depends on version and configuration of the product.
Only the tests applicable have to be performed.
Before starting the test we recommend reading the respective test procedure at least once.
8.4.1 Safe ESD safety operation “Safe OPENING/CLOSING”: check
The test is valid for all versions with Safe ESD function (irrespective of the “SIL seating
configuration”). The Safe ESD reaction to the different seating types is verified in separate
tests.
When switching the Safe ESDa/Safe ESDb inputs accordingly, safety operation into the
configured direction must be triggered.
If "SIL seating = no seating" (without end position protection) is configured, faulty
operation during the test may result in damage to the elements within the safety-
related system.
Possible consequences: Valve damage, motor overheating, contactor jamming, defective
thyristors, heating up or damage to cables.
→ Check “SIL seating” before proof test configuration. The configured type of seating is
indicated in the wiring diagram (page 2).
→ For actuators with “SIL seating” = “no seating”: Interrupt safety operation be- fore
reaching the end position (Set Safe ESDa/Safe ESDb input signals to +24 V DC).
→ For the test, the valve should either be in mid-position or at sufficient distance from the
end positions.
→ In case of damage, the actuator system has to be checked and repaired, if necessary.
5. Check Safe ESD reaction to “Forced limit seating in end position” (limit evaluation) –
for actuators with electronic control unit and limit switches.
6. Check Safe ESD reaction to “Forced torque seating in end position” (torque after limit
evaluation).
7. Check Safe ESD reaction for “no seating” (no evaluation of limit and torque).
8. Check Safe STOP function.
9. Check combination of Safe ESD and Safe STOP function.
NOTICE
1. Operate actuator in mid-position or at sufficient distance from the end positions.
2. Execute operation command in opposite direction of the configured Safe ESD safety
function:
Multi-turn actuators
SA series with Control 3.XX /NI/SIL
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