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