Description
The Bosch 817 218 003 is a specialized electronic control unit engineered for the precise regulation of proportional hydraulic valves. Primarily used in mobile hydraulics and industrial machinery, this controller processes analog command signals to deliver the exact current required for solenoid-operated hydraulic components. It ensures accurate spool positioning, which is critical for smooth flow and pressure control in heavy equipment, such as construction machinery, forestry harvesters, and specialized agricultural implements.
Product Specifications
📍 Product Series: Bosch Proportional Valve Control Series
⚖️ Weight: 0.30 kg
📏 Dimensions: 120 mm x 80 mm x 40 mm (Approx.)
🌍 Origin: Germany
⚡ Operating Voltage: 24 V DC (18–30 V range)
🔄 Function: Proportional solenoid current regulation
🛡️ Protection Class: IP65 (Housing dependent)
🌡️ Operating Temperature: -25°C to +85°C
🏗️ Mounting Type: Surface / Enclosure Mount
🔌 Interface: Industrial circular connectors / Screw terminals
Understanding Proportional Valve Control
In hydraulic systems, this controller manages the transition of electrical commands into mechanical force. By modulating the current through Pulse Width Modulation (PWM), the controller determines the exact displacement of the valve spool, thereby controlling the speed or force of the connected hydraulic actuator.
Recommended Models in the Same Series
🔍 817 218 001: Single-channel basic valve controller.
🔍 817 218 005: Dual-channel controller for complex motion axes.
🔍 817 218 003-R: Factory-refurbished certified unit.
🔍 817 218 008: Variant with integrated diagnostic LED feedback.
🔍 817 218 010: High-current version for large-bore proportional valves.
🔍 817 218 003-XP: Explosion-proof housing variant for hazardous zones.
🔍 BODAS RC Series: Advanced programmable controllers for mobile hydraulics.
🔍 H-Series Valve Driver: Compact DIN-rail mountable version.
🔍 Bosch Valve Interface Cable: Pre-molded connector set for 817 series.
🔍 817 218-Series-Kit: Maintenance kit with configuration jumpers and fuses.
Troubleshooting Tips If you are experiencing inconsistent valve behavior, verify the input signal stability first. Proportional controllers are highly sensitive to “noise” in the command signal. If the valve “jitters,” it is often necessary to adjust the dither frequency settings—a high-frequency ripple current that prevents the valve spool from sticking due to static friction (stiction).
