I. Product Basic Information
Brand: BOSCH REXROTH (Original German)
Model: VT5006S12-R1
Serial Number: 7555/0203
Product Type: Proportional Valve Closed-Loop Control Amplifier Board (Analog Proportional Amplifier)
Installation Method: DIN rail standard European-style card mounting, plug-in type for industrial control cabinets
Core Applications
Specifically designed to match Rexroth’s 4WRE series proportional directional valves with built-in position feedback, used for precise flow and speed closed-loop control in hydraulic systems. Common applications include:
Injection molding machines, die-casting machines, forging presses
Metallurgical rolling equipment, hydraulic systems of construction machinery
Precision servo hydraulic production lines, marine hydraulic control systems
Key Electrical Technical Parameters
Supply Voltage: DC 24V, with reverse polarity protection
Control Input: Differential voltage signal (standard 0~±10V), supports both single-ended and differential control modes
Control Functions:
Adjustable zero offset and output gain via potentiometer
Ramp rise/fall time adjustment (to prevent hydraulic shock)
Maximum output amplitude limit protection to avoid valve spool hitting mechanical stops
Status Indication: Multiple LED fault/run indicators (wire break, overload, ready alarm)
Operating Environment: -25°C ~ +60°C, protection rating IP20 (for cabinet installation)
Closed-Loop Mode: Receives LVDT position feedback signal from the internal valve spool of the proportional valve, enabling high-precision PID closed-loop control with fast response
Model Suffix Explanation
S12: Standard single-channel proportional directional valve drive version
R1: Hardware revision version (commonly R5 is an upgraded model; R1 is an earlier stable version)
7555/0203: Unique factory serial number for traceability and maintenance verification
Main Features and Functions
Built-in ramp generator allows setting acceleration/deceleration times to suppress hydraulic shock
Equipped with wire break detection and overload protection, automatically alarms on coil short circuit
Panel includes test terminals for external multimeter connection to monitor setpoint and actual feedback values, facilitating easy commissioning
European standard card dimensions allow dense multi-card installation on DIN rails, saving space in control cabinets
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