33
8.4.9 Safe STOP function: check
The test applies to the “SIL function” = “Safe STOP OPEN/CLOSE” (Safe STOP)
configuration. The seating configuration is not relevant to the test as it has no impact on the
Safe STOP function.
If the Safe STOP CLOSE or Safe STOP OPEN signals are switched accordingly, the actuator
must stop.
8.4.10 Combination of Safe ESD and Safe STOP function: check
This test is required for the following versions or configurations:
• 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, defective
thyristor, heating up or damage to cables.
→ Check “SIL seating” before proof test configuration.
Fasten control cover screws and tighten glands at conduit entries.
20. Mechanical position indicator: The two dials have a slip clutch for easy adjustment.
At valve fully closed, turn dial (CLOSED) till the arrow is in alignment with the
mark on the show glass. Operate valve into fully OPEN position and adjust dial
marked (OPEN) till the arrow mark is in alignment with the mark on the cover.
The dial (CLOSED) must be held in position while adjusting dial (OPEN). (fig.19).
1. Operate actuator in mid-position or at sufficient distance from the end positions.
2. Start operation command in direction OPEN.
Information: For the test, operation commands (in directions OPEN or CLOSE) can be
executed both from remote (via DCS) and from Local at the controls (via the push
buttons of the local controls).
3. Cancel release signals for directions CLOSE and OPEN one after the other:
3.1. First set Safe STOP CLOSE input signal to 0 V (low).
® Actuator must continue its operation
® No SIL fault signal may be issued.
3.2. Then set Safe STOP OPEN input signal to 0 V (low).
® The safety function is correct if the actuator stops.
® No SIL fault signal may be issued.
4. Set Safe STOP CLOSE and Safe STOP OPEN to +24 V DC (high) again.
Information: If operation command OPEN from REMOTE issued via the control room
is still present, the actuator may start its operation!
5. Start operation command in direction CLOSE
6. Cancel release signals for directions OPEN and CLOSE one after the other:
6.1. First set Safe STOP OPEN input signal to 0 V (low).
® Actuator must continue its operation
® No SIL fault signal may be issued.
6.2. Then set Safe STOP CLOSE input signal to 0 V (low).
® The safety function is correct if the actuator stops.
® No SIL fault signal may be issued.
7. Set Safe STOP CLOSE and Safe STOP OPEN to +24 V DC (high) again.
Information: If operation command OPEN from REMOTE issued via the control room
is still present, the actuator may start its operation!
1. Operate actuator in mid-position or at sufficient distance from the end positions.
2. Start operation command in direction OPEN.
Information: For the test, operation commands (in directions OPEN or CLOSE) can be
executed both from remote (via DCS) and from Local at the controls (via the push
buttons of the local controls).
3. Cancel release signals for directions CLOSE and OPEN one after the other:
3.1. First set Safe STOP CLOSE input signal to 0 V (low).
® Actuator must continue its operation
® No SIL fault signal may be issued.
3.2. Then set Safe STOP OPEN input signal to 0 V (low).
® The safety function is correct if the actuator stops.
® No SIL fault signal may be issued.
4. Set Safe STOP CLOSE and Safe STOP OPEN to +24 V DC (high) again.
Information: If operation command OPEN from REMOTE issued via the control room is
still present, the actuator may start its operation!
5. Start operation command in direction CLOSE
6. Cancel release signals for directions OPEN and CLOSE one after the other:
6.1. First set Safe STOP OPEN input signal to 0 V (low).
® Actuator must continue its operation
® No SIL fault signal may be issued.
6.2. Then set Safe STOP CLOSE input signal to 0 V (low).
® The safety function is correct if the actuator stops.
® No SIL fault signal may be issued.
7. Set Safe STOP CLOSE and Safe STOP OPEN to +24 V DC (high) again.
Information: If operation command OPEN from REMOTE issued via the control room is
still present, the actuator may start its operation!
NOTICE
Multi-turn actuators
SA series with Control 3.XX /NI/SIL
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