●
One of the following Safe ESD safety functions with any seating configuration:
-
Safe ESD function: “Safe CLOSING” (Safe ESD in direction CLOSE)
-
Safe ESD function: “Safe OPENING” (Safe ESD in direction OPEN)
●
Safe STOP function
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, de-
fective thyristors, heating up or damage to cables.
→
Check “SIL seating” before proof test configuration.
→
For actuators with “SIL seating” = “no seating”: Interrupt safety operation be-
fore reaching the end position (Set
Safe ESDa
and
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 ne-
cessary.
Test procedure
This test is intended to confirm the correct function of the combination of Safe ESD
safety operation and the Safe STOP function.
Test sequence
1.
Operate actuator in mid-position or at sufficient distance from the end positions.
2.
Execute Safe STOP command in direction of the configured Safe ESD safety
function:
→
For “Safe CLOSING” (Safe ESD in direction CLOSE) configuration:
Set
Safe STOP CLOSE
input signal to 0 V (low).
→
For "“Safe OPENING” (Safe ESD in direction OPEN) configuration:
Set
Safe STOP OPEN
input signal to 0 V (low).
3.
Initiate safety operation:
Set
Safe ESDa
and
Safe ESDb
input signals to 0 V (low).
➥
Safety function is correct, if the actuator performs a safety operation into the
configured direction.
➥
No SIL fault signal may be issued.
4.
Set
Safe ESDa
,
Safe ESDb
,
Safe STOP OPEN
and
Safe STOP
CLOSE
input signals to +24 V DC (high) once the test is complete.
Information
In addition to this test, all other proof tests relating to the individual safety functions
(Safe STOP or ESD) in this manual have to be performed for the combination of
Safe ESD and Safe STOP.
8.5.
Maintenance
Maintenance and service tasks may only be performed by authorised personnel who
have been trained on functional safety (refer to chapter 5).
After maintenance and service interventions, an additional functional test to validate
the safety function is imperatively required. Validation must include at least the tests
described in the subsequent chapters:
page 27, Safety equipment: check
page 29, Proof test (verification of safe actuator function)
In case a fault is detected during maintenance, this must be reported to AUMA Riester
GmbH & Co. KG.
Information
AUMA actuators prioritise motor operation to manual operation. This means that the
actuator automatically switches to motor operation if requested. However, we recom-
mend activation of motor operation for a short time subsequent to maintenance or
service interventions to ensure safe engagement of motor coupling.
38
Part-turn actuators
Tests and maintenance
with AC 01.2-SIL/ACExC 01.2-SIL
