Macrospec

PRODUCTS

TVC Positioner

Overview

The TVC Positioner is designed specifically to provide precise valve positioning control of hydraulic quarter-turn or linear valve automation systems using either on-off or proportional solenoid valves. The TVC Positioner can accept positional feedback from a three wire potentiometer or a position transducer with a current output.

Applications

Precise positioning of any quarter-turn or linear valve or mechanism.

Key Features & Benefits

  • Basic System

    • Zone 1 / 2 Infrared communication interface using an Exia keypad
    • Large graphics LCD with comprehensive status and data display
    • Three way galvanic isolation – command in, actual position out and power supply
    • Selectable sinking or sourcing actual position 4-20mA output
    • Local / remote configuration enable input and open drain status output
    • Selectable solenoid drive sense for failsafe operation
    • Selectable default operation on command signal/feedback signal break
    • ESD solenoid output – 24VDC open drain
    • Fault output – 24VDC open drain
    • Hydraulic pump drive controlled by demand or external pressure sensors
    • External fault contact monitoring
    • Selectable interlock between ESD and fault outputs
    • Stepping mode with adjustable ON and OFF times
    • Low power – normal operation less than 2W plus solenoids
    • Direct mounting within Compact Exd Enclosure System

    Enhanced System

    • HART communication channel on re-transmitted actual position signal
    • Foundation Fieldbus interface
    • 3 analogue inputs for hydraulic system monitoring and condition monitoring
    • Performance logging with USB download
    • 2.5A proportional solenoid drive with PID control