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→ For actuators with “SIL seating” = “no seating”: Interrupt safety operation before
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 necessary.
This test is intended to confirm the correct function of the combination of Safe ESD safety
operation and the Safe STOP function.
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.
Resetting limit-switching:
Operate the valve away from end-position to account for over-run or to the desired switch
tripping point.
− Push thrust bolt I inwards and turn (fig. 19). The bolt remains in this position.
− For CLOSED position turn spindle marked (Z), (for OPEN position spindle
marked , O) slowly as indicated by arrow (fig.19). Distinct "clicks" can be felt and
heard. Continue turning the spindle until the cam operates the switch. At this stage,
the spindle should not "click" any more and should not be turned any further.
If inadvertently you override the tripping point, continue turning the spindle slowly in
the same direction till the switch cam goes back to its original position. Repeat
setting instructions as above described.
− Turn thrust bolt I till it snaps back into its original position by spring action.
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).
Ø Safety function is correct, if the actuator performs a safety operation into the
configured direction.
Ø 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.
NOTICE
Multi-turn actuators
SA series with Control 3.XX /NI/SIL
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