Flowserve MX Electronic Actuator SIL Safety IOM - Manual (Page 29)

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Limitorque MX Electronic Actuator FCD LMENIM2350-01 – 9/13
flowserve.com FLOWSERVE PROPRIETARY INFORMATION
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10
Emergency
Shutdown (ESD)
ESD signals may be applied to the actuator to override any existing command signal and send the valve to its pre-
selected shutdown position, providing the actuator is in the remote mode.
Any non-ESD command signal will be ignored while the ESD signal is asserted.
10.1 Configurable ESD Actions
• Open
• Close
• Stop
• Ignore (continue normal operation)
• Move to fail-safe position.
10.2 Configurable ESD Signal Logic
Signal present (electrical signal assumed to be available during emergency).
Signal absent (electrical signal normally present but is removed during emergency by operations personnel or by failure
in the remote wiring or equipment).