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Topworx-P-DX PST

TopWorx™ DX PST with HART 7 Switchbox

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Product Description

The TopWorx DX PST switchbox with HART® protocol is a reliable, user-friendly solution for performing Partial Stroke Test and Emergency Shut Down for critical applications. Units provide valuable valve data and diagnostic information, relaying feedback to Industrial Internet of Things (IIoT) systems via digital and analog signals. Expanded options for sensor redundancy up to 4 GO™ Switches and pilot redundancy up to 2 integrated pilots all protected within a single enclosure .Thanks to the integrated PST button, operators can test valves without any additional devices, simplifying maintenance.

Specifications

Certifications
Intrinsically Safe, Explosion/Flame-proof and General Purpose
Environmental Ratings
IP66, IP67
UL Type 4/4X
Shaft Rotation
20° to 90° (Consult Factory for Additional Shaft Rotation Sensing)
Hysteresis
0.5%
Repeatability
0.5%
Linearity
1/4 Turn, 1% of span
Temperature Range
without internal solenoids and local PST Switch: -40°C to +80°C (-40°F to +176°F)
with internal solenoids: -10°C to +60°C (14°F to +140°F)
with local PST Switch: -20°C to +50°C (-4°F to +122°F)
Terminal Connection
26 to 14 AWG
Pneumatic Connection
1/4" npt (1.06Cv), 1/2" npt (3.7Cv)
Display Type
Liquid Crystal Display (LCD)
Local Controls
Push Buttons
Valve Action
Double, Direct (DA) & Reverse (RA)
Seals
Silicone, Buna
4-20ma/ HART Terminal Voltage
Min: 10 VDC
Max: 33 VDC
Pilot/SOV 1 &Pilot/SOV 2
Min: 22 VDC
Max: 26.4 VDC
28W
Internal Temperature Sensor Accuracy
± 2.5°C
Analog Position
0 to 100%
High (H) Alarm
22.3mA
Low (L) Alarm
< 3.5mA
Multi-Drop Current Draw
4.0mA
Resistance
100K Ohms

Features

  • 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.

Documents & Drawings