Bosch Rexroth RA 10 Series - Product Description, Features, and Operation Modes

14/48 Analog amplifier RA | About this product
BoschRexrothAG, RE95230-B/2021-12-01
5 About this product
5�1 Product description
The analog amplifier serves to control up to two proportional solenoids.
The specified control voltage is processed in the amplifier as an input variable.
The analog amplifier provides aregulated electric current as an output variable for
control of the proportional solenoids.
The RA analog amplifier can be used to actuate up to two proportional
solenoids in asingle device (for example atoggling axial piston unit or
avalve section with separate control of the proportional solenoids) or to
actuate two devices independently of each other (for example, two individual
axialpiston units or valves). The use of only one proportional output is possible.
An additional 1 A output is available for aswitching function.
5�2 Features
The electronic analog amplifier offers the following features:
• Optional interdependent locking of the proportional solenoid control
• Voltage supply for external command value potentiometer
• Conditional monitoring of the command value potentiometer for cable break and
short circuit
• Externally controllable switching output
• Error output
• Separately adjustable ramp times for each solenoid
• Overload protection, overvoltage protection, conditional short circuit protection
• Separately adjustable currents I
min
(offset) and I
max
(gradient) for every solenoid
• Externally adjustable PWM frequency