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