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