Safe Esd Reaction For "No Seating" (No Evaluation Of Limit And Torque): Check - AUMA SQ 05.2-SQ 14.2 Manual

Part-turn actuators
SQ 05.2 SQ 14.2/SQR 05.2
8.4.8.

Safe ESD reaction for "No seating" (no evaluation of limit and torque): check

Configuration
Test procedure
Test procedure
SQR 14.2
Check seating via torque and limit switches:
3. Operate torque switches and hold activated.
For "Safe CLOSING" (Safe ESD in direction CLOSE) configuration:
Turn test button [1] in direction of the TSC arrow:
For "Safe OPENING" (Safe ESD in direction OPEN) configuration: Turn
test button [2] in direction of the TSO arrow:
4. Start safety operation while torque switch is operated:
Set Safe ESDa
The safety function reaction to the torque switch and limit switch signals is
correct if:
- Safety operation is not started.
- No SIL fault signal is issued via
5. Set Safe ESDa and
test.
6. Close switch compartment.
This test is required for the following versions or configurations:
Actuator with electromechanical control unit
One of the following safety functions:
- Safe ESD function: "Safe CLOSING" (Safe ESD in direction CLOSE)
- Safe ESD function "Safe OPENING" (Safe ESD in direction OPEN)
"SIL seating" configuration
= No seating"
(Safe OPENING or CLOSING without responding to any protective equipment)
For Safe ESD operation, the actuator has to perform the safety operation without
interruption. Limit switching and/or torque switching must not stop the safety operation
Since "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.
Interrupt safety operation before reaching the end position (Set
ESDa and Safe ESDb
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.
1. Operate actuator in mid-position or at sufficient distance from the end positions.
2. Open the switch compartment
3. Initiate safety operation:
Set Safe ESDa
and Safe ESDb input signals to 0 V (low).
SIL failure
Safe ESDb input signals to +24 V DC (high) after the
input signals to +24 V DC).
and Safe ESDb input signals to 0 V (low).
Tests and maintenance
output.
Safe
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