TopWorx DX Partial Stroke Test with HART 7

July 26, 2022
Emerson's TopWorx DX Partial Stroke Test with HART 7 monitors and tests valve assemblies.

The TopWorx DX Partial Stroke Test with HART 7 provides detailed valve assembly data and diagnostics, enabling predictive maintenance and reliable operation. The units provide valuable valve data and diagnostic information for the digital transformation of process applications. It integrates with existing valves and control systems.


The DX PST’s partial stroke test ensures the system’s reliable function without shutting down the process. A safety feature confirms the valve will fully close and stop the process if an emergency is detected, and the test is activated by simply pressing the local PST button — no additional equipment is required. To prevent critical failure in upset conditions, the unit will override testing to perform an emergency shutdown.


Certified for operation in harsh and hazardous applications, the adaptive DX PST is designed to ensure the integrity of valves, improving overall safety and facility uptime in oil and gas, refinery, chemical, industrial energy, and mining applications.


The HART protocol builds another layer of information that ensures data, trends, and diagnostics are monitored and tied into the Industrial Internet of Things. Capable of Safety Integrity Level 3, the DX PST is available with an integrated 2oo2 or 2oo3 solenoid valve redundancy when paired with ASCO Series Advanced Redundant Control System to further enhance safety and open terminals that allow an additional pressure transmitter along with two pressure switches. The discrete valve controller offers simple local and remote calibration.

  • Remote real-time feedback with HART 7: AMS interface with device status and expanded device variables
  • Local and remote calibration and activation
  • User-selectable alarms via the HART protocol
  • Compatible with multiple distributed control systems and handheld devices
  • Capabilities include solenoid valve testing, emergency shutdown (ESD) detection, internal device temperature monitoring, local calibration, and more
  • SIL3 capable
  • Single and dual solenoid control for integrated pilot valves and external solenoid valves: SOV in 1oo1, 1oo2 or 2oo2 architectures
  • Open terminal options, accommodating an additional pressure transmitter and two pressure switches