0811405090 Bosch Rexroth Amplifier Card / Module

Functional characteristics

Signal Conversion and amplification Weak control signals, such as the industrial control standard 0-5V, 0-10V, -5-5V, -10-10V voltage signals or 0-20mA, 4-20mA current signals, are converted and amplified into sufficient current to drive the proportional electromagnet to control the operation of the proportional valve. Achieve precise control of parameters such as flow rate and pressure in the hydraulic system.

Characteristic curve correction: The characteristic curve correction can be carried out by separately adjusting the step size and maximum value to adapt to different application requirements and system characteristics, ensuring an accurate linear relationship between the output of the proportional valve and the control signal, and improving the control accuracy.

Multiple control functions: It may have functions such as dead zone adjustment, gain adjustment, ramp time setting, and flutter regulation. Dead zone adjustment can eliminate the insensitive zone of the proportional valve when small signal input occurs. Gain adjustment can change the amplification factor according to the system requirements. The slope time setting can control the opening and closing speed of the proportional valve to prevent sudden changes in system pressure or flow. Flutter regulation helps to overcome the static friction of the valve core of the proportional valve, improving its response speed and control accuracy.

Speculation of technical parameters

Input signal range: It may support multiple types and ranges of input signals, such as differential input ±10V, four control value inputs (starting voltage ±10V), current input 4-20mA, etc., to be compatible with different control devices and signal sources.

Output current capacity: It can output sufficient current to drive the proportional electromagnet. Generally, the current output range of different models of amplifiers varies, usually between several hundred milliamperes and several amperes, to meet the driving requirements of proportional valves of different specifications.

Response time: It has a relatively short response time, capable of quickly converting the input signal into output current, enabling the proportional valve to respond promptly to changes in the control signal. Generally, the response time is in the millisecond range.