The ADN 404 has been developed as a digital controller with a valve amplifier for actuation of a servo-valve
Extremely suitable for use with high-speed servo-valves for control functions in the 0–150Hz frequency range
Equipped with a triple-controller cascade, in order to permit a large number of applications
Input sensor system is equipped with interchangeable sensor modules
A medium-frequency generator with a demodulator is available for operation with inductive position encoders
Sensor input modules are equipped with a second-order low-pass filter
External sensors can be supplied with 24V DC from the device
Equipped with six opto-decoupled inputs
All settings are made using the ADN configurator via an RS232 interface linked to a PC or laptop computer

Type		Valve amplifier
Use		Actuation of a servo-valve
Supply voltage		24V DC, nominal (22...28 V) DC
Inputs		6, opto-decoupled, of which 1 x Enable, 1 x Ramp OFF and 4 x Setpoint (internal)
Alarm output		1 x 24V/100mA
Dither generator		Variable from 50 to 200Hz, amplitude 0 to 10%, referred to +/–10V
Temperature range		-20°C...+60°C
Controller setting range		1 to 32000 for P, I, DT1
Sensor modules		+/–10V, 12mA +/–8mA, 4–20mA, 0–10V, 7.5V +/–4V Sign-changing for controller outputs, sensor outputs and setpoint-sensor output
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