The BOSCH 0 811 405 140 is a specialized proportional amplifier module used in industrial and maritime hydraulic automation systems. It is primarily designed to control proportional valves, ensuring precise management of fluid power in applications such as machine tools, propulsion stabilizers, and hydraulic control circuits.

Product Overview

This module acts as the interface between your control system (like a PLC) and the hydraulic valves. It converts digital or analog command signals into the regulated pulse-width-modulated (PWM) current required to drive proportional solenoids.

• Manufacturer: Bosch Rexroth
• Function: Proportional valve control/amplifier
• Application: Precision hydraulic systems and motion control

BOSCH 0 811 405 140

BOSCH 0 811 405 140 ELECTRIC AMPLIFIER MODULE

$1,599.00·Bosch

Key Technical Considerations

• Installation: These modules are typically mounted in standard industrial enclosures or 19″ racks. Always ensure the system is de-energized before inserting or removing the card to prevent damage to the backplane connectors.
• Setup: Configuration often involves adjusting onboard potentiometers for parameters like ramp times (acceleration/deceleration), valve zero point, and sensitivity (gain).
• Maintenance: If you are replacing a unit, ensure that the DIP switch settings or potentiometer positions on the new module match your existing system configuration exactly to maintain the same control characteristics.

Frequently Asked Questions

• Is this a plug-and-play device?

  While it is a modular component, it is rarely “plug-and-play” without adjustment. You will likely need to perform loop calibration on-site to tune the valve’s response to your specific hydraulic load.

• What if I cannot find this exact part number?

  Bosch Rexroth often has updated series for legacy components. Contact a certified automation distributor with your full system serial number to check for a compatible, modern-series functional equivalent.

• Can it be repaired?

  Yes, specialized industrial repair labs can often service these boards if the failure is due to component aging (like dried capacitors) rather than severe trace damage.