Architecture, Configuration And Applications; Architecture (Actuator Sizing) - AUMA AC 01.2-22X Manual

Multi-turn actuators
SA .1 with AC 01.2-22X/-22Y/ACExC 01.2-22X/-22Y
3.

Architecture, configuration and applications

3.1.

Architecture (actuator sizing)

Information
Information
For actuator architecture (actuator sizing) the maximum torques, run torques and
operating times are taken into consideration.
Incorrect actuator architecture can lead to device damage within the safety-
related system!
Possible consequences: Valve damage, motor overheating, contactor seizure,
damage to the electronics, heating up or damage to cables.
The actuator technical data must imperatively be observed when selecting the
actuator.
Sufficient reserves have to be provided to ensure that actuators are capable of
reliably opening or closing the valve even in the event of an accident or under-
voltage.
Architecture when using the Safe STOP function
For the Safe STOP function, the motor is switched off, overrun may possibly occur!
Valve damage due to overrun!
For the Safe STOP function, the overrun of the arrangement (actuator, gearbox,
valve) and the reaction time have to be observed.
If the application requires self-locking of the actuator, please consult AUMA.
Architecture when using the Safe ESD function
Actuators with electromechanical control unit:
For "SIL seating" = "no seating" (without end position protection), we recommend:
To prevent valve damage during safety operation, we recommend, depending
on the stiffness, sizing the valve to 3
To avoid thermal damage due to excessive currents, we recommend monitoring
(assessing) the motor protection.
Actuators with electronic control unit MWG:
End position signalling (limit switching) and torque signalling via the electronic control
unit MWG are not considered as safe signals.
To prevent valve damage during safety operation, we recommend, depending
on the stiffness, sizing the valve to 3
To avoid thermal damage due to excessive currents, we recommend monitoring
(assessing) the motor protection.
Actuators with electronic control unit MWG including limit switches:
For "SIL seating" = "no seating" (without end position protection), we recommend:
To prevent valve damage during safety operation, we recommend, depending
on the stiffness, sizing the valve to 3
To avoid thermal damage due to excessive currents, we recommend monitoring
(assessing) the motor protection.
Architecture, configuration and applications
5 times the maximum actuator torque.
5 times the maximum actuator torque.
5 times the maximum actuator torque.
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