文档介绍：Digital amplifier and controller HA 9140
for proportional valves EL4 4/2004
Replaces
HA 9140 4/2000
General Applications
The amplifier card EL4 is used for: • revolutions per minute
• With or without electrical feedback transducers: • torque
• proportional directional valves direct and pilot • power etc.
operated
• proportional flow control valves • Volume flow control and pressure control of pumps (if
• proportional pressure reducing valves the occasion arrives: limitation in weight, controlling
• proportional pressure regulating valves valve spool position)
• cartridge valves
• servo valves with torque motors • Controlling of different process values:
• P/Q controlling
• Controlling of hydraulic motors, installations and • pump controlling
systems, .: • controlling of pressures
• position • controlling of pilot- and main stage
• speed • cascade controlling ponents etc.
• pressure
Features
• Fully digitized amplifier and controller with the advantage • high reliability and safety through the use of a
of: hardware watch-dog and reset module
• no on-board potentiometer • variable settings for ic systems and sensor
• no jumpers settings required signals making high flexibility possible
• digital setting and display of all parameters
• user safety when programming • Functional use of the interface (partly still in
• no potentiomet