Description
⚙️ Product Overview
The REXROTH VT3000-37 is an analog amplifier PCB from the VT 3000 series, designed for electronic control of hydraulic proportional valves.
The amplifier receives an electrical command signal from a controller such as a PLC or industrial control system and converts the command into a controlled output current for the proportional valve solenoid. This allows the hydraulic valve to regulate machine movement, pressure, or flow according to the control signal.
The VT3000-37 uses a 24 VDC ±10% operating supply. The Series 3X VT 3000 design uses a plug-in card format intended for suitable card holders or rack assemblies. Power should be switched off before inserting or removing the amplifier card.
The exact listing identifies the product as VT3000-37 / VT30XX PCB Card. Matching records also associate VT3000-37 with part number R900020298.
🔧 Key Features
- REXROTH VT 3000 series analog amplifier
- Model VT3000-37
- Part number commonly identified as R900020298
- Proportional valve control amplifier
- 24 VDC ±10% operating voltage
- Analog command signal processing
- Current output for proportional solenoid control
- Plug-in PCB / amplifier card construction
- Designed for VT 3000 series card holders
- Suitable for industrial hydraulic control systems
- No position feedback on the amplifier configuration
- Legacy Rexroth hydraulic electronics
📋 Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | REXROTH |
| Manufacturer | Bosch Rexroth / Indramat |
| Model | VT3000-37 |
| Part Number | R900020298* |
| Series | VT 3000 |
| Product Type | Analog Amplifier PCB Card |
| Function | Proportional Valve Control |
| Operating Voltage | 24 VDC ±10% |
| Input Type | Analog Command Signal |
| Output | Controlled Solenoid Current |
| Position Feedback | Not present |
| Card Type | Plug-in Amplifier PCB |
| Rack / Holder | VT 3000 compatible card holder |
| Application | Hydraulic Proportional Valve Control |
| Condition | New – Open Box** |
| Country of Origin | Germany** |
- R900020298 is identified with VT3000-37 in matching product records. Verify the complete identification label on the physical card before ordering.
** The condition and country of origin above refer to the matching VT3000-37 listing; condition can vary between individual surplus listings.
🔌 Operating Function
The VT3000-37 is used between a machine controller and a hydraulic proportional valve.
A PLC or other controller generates an analog command. The VT 3000 amplifier processes this signal and controls the current delivered to the proportional solenoid. The resulting valve position or hydraulic response changes according to the command value.
The VT 3000 Series 3X documentation describes a differential amplifier input, ramp generation, current output stage, monitoring functions, and PWM output. The PWM stage provides a dither effect that can help reduce proportional-valve hysteresis.
Typical applications include:
- Hydraulic presses
- Injection molding equipment
- Steel processing machinery
- Machine tools
- Industrial forming equipment
- Hydraulic positioning systems
- Proportional directional valve control
- Pressure and flow control systems
🛠️ Installation & Configuration
Before installation, confirm that the replacement card has the same complete model and series identification as the original.
Check the following:
- VT3000-37 model number
- R900020298 part number where applicable
- Series/revision information
- Card holder type
- Supply voltage
- Command signal range
- Solenoid connection
- Ramp configuration
- Existing jumper settings
- Hydraulic valve model
The VT 3000 documentation specifically warns that power should be switched off before connecting or disconnecting the amplifier card.
Control wiring should be kept away from high-current power wiring. Shielded control cables are recommended for sensitive command signals, and the manufacturer’s grounding arrangement should be followed.
After installation, check the supply voltage and command signal before connecting the valve under full operating conditions.
🔍 Maintenance Tips
Keep the amplifier card and card holder clean and dry. Dust, oil contamination, oxidation, and loose connections can cause unstable valve control.
Recommended inspection points include:
- PCB connector condition
- Card holder contacts
- Power supply stability
- Command input signal
- Solenoid output current
- Ramp adjustment
- LED indicators
- Jumper configuration
- Grounding and shielding
- Hydraulic valve response
If the machine shows unstable movement or inconsistent hydraulic pressure, check the command signal and amplifier output before replacing the valve itself.
For long-term spare storage, keep the PCB in ESD-safe packaging and protect it from humidity.
❓ Frequently Asked Questions
Q: What is the REXROTH VT3000-37?
A: It is an analog proportional-valve amplifier card from the Rexroth VT 3000 series.
Q: What voltage does the VT3000-37 use?
A: The published specification identifies a 24 VDC ±10% operating supply.
Q: What does the amplifier control?
A: It controls the electrical current supplied to proportional hydraulic valve solenoids.
Q: Is it a PLC module?
A: No. It is a hydraulic proportional-valve amplifier rather than a conventional PLC I/O module.
Q: Does it provide position feedback?
A: The VT 3000 37 specification identifies position feedback as not present.
Q: Can the card be removed while the system is powered?
A: No. Power should be switched off before inserting or removing the amplifier card.
Q: What type of signal does it use?
A: The VT 3000 family uses analog command signals. The exact command range depends on the specific configuration and should be checked against the original machine documentation.
Q: Is VT3000-37 interchangeable with VT3000-36 or VT3000-20?
A: Not automatically. Different VT 3000 variants can have different control functions and configuration settings. The complete part number and valve application must be matched.
🔄 10 Related REXROTH Models / Components
- REXROTH VT3000-20
- REXROTH VT3000-36
- REXROTH VT3000-37
- REXROTH VT3002-20/48
- REXROTH VT3002-20/48F
- REXROTH VT3002-21/48F
- REXROTH VT3006-36
- REXROTH VT3006-S36
- REXROTH VT3013-37
- REXROTH VT1516 Series Card Holder
These are related VT-series amplifiers, card holders, or hydraulic control components. They should not be treated as direct replacements without checking the valve, signal, rack, and electrical configuration.
🏭 Application Summary
The REXROTH VT3000-37 is a specialized analog amplifier PCB used to control proportional hydraulic valves. Its role is to translate controller command signals into controlled solenoid current, making it an important interface between electrical automation equipment and hydraulic machinery.
For legacy hydraulic systems, retaining a tested VT3000-37 as a spare can be useful because replacing the complete control architecture may require substantial rewiring and commissioning work.
For replacement purchasing, match the complete VT3000-37 identification, part number, card-holder arrangement, command signal, valve type, and configuration settings rather than relying on the model family alone.
