AN238

Servo Amplifier

The AN238 servo amplifier has been designed for the control of axial piston pumps valves in conjunction with servo valves.

The module can be used as a pressure controller (zero stroke pump) or a volumetric flow controller by changing jumpers.

Features:

• linear output stage
• protected against wrong polarity
• different inputs for the most common input voltages. 1 user-selectable input (10k /V), 1 - 10V differential input
• ramp can be disabled externally
• quadrant-sensitive ramp with wide range of adjustment (0.2...10sec)
• external enable (normally closed circuit)
• external controller enable
• adjustable pressure controller
• LED indicators for 'Power on', 'Ramp off', 'Fail safe', 'Ctrl on'
• potentiometers on the front plate for setting ramp times, Qmax and controller P and I components
• monitoring of pressure sensor and angular resolver on pump yoke
• logic output for malfunctions