TopWorx, the global leader in valve control and position sensing for the process industries brings you discrete valve controllers with 4-20mA position transmitters and HART protocol. Adding the precise communication functionality of HART protocol to the rugged and dependable D-Series Valvetop is just one more way that TopWorx delivers control without compromise. The 2-wire transmitter with HART will generate a nominal 4-20mA signal proportional to valve position output for full-range actuation of the valve. The transmitter is capable of generating signals below 4mA and above 20mA if the position sensor indicates an out-of-range value. With the added HART digital communication capability, remote calibration and parameter configuration can be performed via a handheld. 4-20mA Transmitter Features - Single push button auto-calibration eliminates zero/span calibration
- Fully encapsulated electronics module is potted and sealed for excellent environmental protection
- Clockwise and counterclockwise rotation
- Non-volatile memory of set points (set points remain after loss of power)
- No internal backlash – feedback device is mounted directly to the shaft, eliminating gears
- Additional options that can be mounted in the valve monitoring enclosure, such as solenoids and switches
Added HART Features - Remote set point calibration using a handheld device for calibration and monitoring
- Selectable over and under travel settings
- 4 to 20mA variable reading
- Monitoring and setting of alarms with advanced diagnostics. Includes dead band detection, out of range indication and detection of internal memory errors
Electrical Data - Voltage Input Range: 12 - 39 Volts DC
- Standard Output Signal: Two-wire 4-20mA with out-of-range indication
- Standard HART compliant
Technical Specification - Range from 20 to 320 degrees
- 1% linearity for the complete device
- Hysterisis: 0.5% of full scale
- Repeatability: 0.3% of full scale
- Operating Temperature Range: -40 to 80º C
- Voltage Input Range: 12 - 39 Volts DC
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