Electronic Interface System Vacuum Controls

 

Electronic interface system vacuum controls (EIS) provide complete vacuum control and integration specifically designed to optimize V1000 performance. EIS allows pneumatic/electronic communication with valves to provide accurate and consistent control of vacuum levels. Using EIS, valves are linked to mill-wide DCS systems for optimum vacuum control.

 

Features and Benefits

  • Provides electronic communication with vacuum control valves that is more precise and faster than pneumatic valve controls
  • System responds immediately to changes detected in vacuum level supply or incoming sheet consistency to minimize variation
  • Remote vacuum setpoint adjustment for faster, easier, and safer vacuum adjustment
  • A single I/P panel can drive several valves thereby reducing system complexity and cost
  • Systems can be configured for stand-alone closed-loop control or linked directly with mill-wide process control systems

 

Four Control Solutions

 

The EIS vacuum control features two links to the existing DCS system and two stand-alone, closed loop vacuum control systems.

E1 allows remote adjustment of vacuum setpoints. The system uses a custom-calibrated current-to-pressure transducer that converts an electronic 4/20mA signal from the mill control system to the proper air signal required to operate the V1000 valve. E2 combines the E1 with a current-to-pressure transducer that is pneumatically connected to the process standpipe. It requires a 4/20 mA input signal for each valve, and provides a 4/20 mA output signal that corresponds to the process vacuum range.

 

E3 is a stand-alone closed-loop system for mill that cannot supply a 4/20 mA signal. It consists of a V1000-E2 panel and a remote single-loop PID controller panel that lets the operator view process vacuum, and easily make setpoint changes. E4 lets mills introduce an alternative input signal into the PID control panel loop - typically a 4/20mA-process variable - like consistency measurement. The E4 solution is essentially an E3 system, but with the P/I output signal connected to a process display for visual feedback of stepfoil or other control box vacuum.

 

For more information on electronic interface system vacuum controls, request product information using the link above.