Description
🔹 Product Overview
The Rexroth VT-VSPA2-1-20/VO/T1, material number R901002090, is an analog valve amplifier card designed for controlling proportional directional valves and proportional pressure valves in industrial hydraulic systems.
This amplifier belongs to the VT-VSPA2-1 series and uses a Euro-card format for installation in compatible control cabinets and electronic card holders. It processes analog command signals and converts them into controlled output current for proportional solenoids.
The module supports several command value inputs, including voltage and current signals. Its design allows accurate control of proportional hydraulic valves while providing adjustable ramp functions, characteristic curve correction, enable functions, and diagnostic status signals.
The T1 version is configured with one adjustable ramp time. It is suitable for applications requiring controlled acceleration and deceleration of hydraulic movements without abrupt changes in valve command signals.
🔹 Main Features
⚙️ Analog control for proportional hydraulic valves
⚙️ Designed for proportional directional and pressure-control applications
⚙️ 24 VDC operating voltage
⚙️ Differential command value input up to ±10 V
⚙️ Four callable voltage command inputs
⚙️ 4–20 mA current command input
⚙️ Adjustable zero point
⚙️ Adjustable command value amplification
⚙️ Adjustable ramp function
⚙️ T1 version with one ramp time
⚙️ Enable input
⚙️ Ramp ON/OFF function
⚙️ Characteristic curve correction
⚙️ Adjustable step levels
⚙️ Adjustable maximum output values
⚙️ Ready-for-operation output
⚙️ Actual current value output
⚙️ Short-circuit-protected power output stage
⚙️ Reverse-polarity protection for the power supply
🔹 Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Rexroth |
| Model | VT-VSPA2-1-20/VO/T1 |
| Material Number | R901002090 |
| Product Name | Analog Valve Amplifier Card |
| Series | VT-VSPA2-1 |
| Component Series | 20 to 29 |
| Control Type | Analog Hydraulic Valve Control |
| Application | Proportional Directional and Pressure Valves |
| Operating Voltage | 24 VDC |
| Operating Voltage Range | 18 to 35 VDC |
| Power Consumption | Less than 50 VA |
| Current Consumption | Less than 2 A |
| Fuse | 2 A medium time-lag, replaceable |
| Command Value Inputs | Four callable voltage inputs |
| Voltage Input Range | 0 to ±10 V |
| Differential Input | 0 to ±10 V |
| Current Input | 4 to 20 mA |
| External Ramp Input | 0 to +10 V |
| Digital Input Function | Enable / Command Selection / Ramp ON-OFF |
| Digital ON Level | 8.5 V to operating voltage |
| Digital OFF Level | 0 to 6.5 V |
| Ramp Time Range | 20 ms to 5 s |
| Extended Ramp Range | 0.2 to 50 s |
| Zero Adjustment | ±30% |
| Command Value Adjustment | 0 to 110% |
| Step Level Adjustment | 0 to 50% |
| Amplitude Adjustment | 0 to 110% |
| Power Output Stage | 0 to 2.5 A |
| Internal Command Output | ±10 V |
| Actual Current Output | ±2.5 V |
| Ready Output | More than 16 V during normal operation |
| Connection Type | 48-pin male multipoint connector |
| Connector Standard | DIN 41612, Type F |
| Card Format | Euro-card |
| Dimensions | Approx. 100 × 160 mm |
| Operating Temperature | 0 to +50°C |
| Storage Temperature | -25 to +85°C |
| Net Weight | Approx. 0.17 kg |
| Country of Origin | Germany / Verify by Nameplate |
| Product Condition | New Open Box / New Surplus |
🔹 Compatible Valve Applications
The VT-VSPA2-1 series is designed for controlling selected Rexroth proportional hydraulic valves.
Typical compatible applications include:
⚙️ 4WRA 6 proportional directional valves
⚙️ 4WRA 10 proportional directional valves
⚙️ 4WRZ series proportional directional valves
⚙️ 3DREP 6 proportional pressure valves
Compatibility should always be confirmed using the complete valve model number, solenoid configuration, electrical requirements, and existing amplifier settings.
🔹 Control Function
The amplifier receives an external command value and processes the signal through its internal control circuitry.
The command signal can be supplied through selectable voltage inputs, a differential voltage input, or a 4–20 mA current input.
The internal command value can then be adjusted through:
⚙️ Zero-point adjustment
⚙️ Command value amplification
⚙️ Ramp adjustment
⚙️ Step-level correction
⚙️ Amplitude limitation
The processed command signal controls the output stage, which supplies controlled current to the proportional valve solenoids.
This allows the hydraulic valve to move in a controlled manner according to the electrical command signal.
🔹 Ramp Function
The T1 configuration provides one adjustable ramp time.
The ramp function is used to control how quickly the command signal changes.
This can help reduce sudden hydraulic movement and may be useful when controlling:
⚙️ Hydraulic cylinders
⚙️ Machine slides
⚙️ Industrial presses
⚙️ Positioning systems
⚙️ Material handling equipment
⚙️ Motion-control applications
The ramp time can be adjusted over the specified operating range according to the required hydraulic response.
🔹 Installation Notes
Before installing the amplifier card:
- Verify the complete model number VT-VSPA2-1-20/VO/T1.
- Confirm the material number R901002090.
- Check the 24 VDC power supply.
- Inspect the Euro-card connector and backplane.
- Verify the proportional valve type.
- Check command signal wiring.
- Confirm enable signal wiring.
- Check the hydraulic valve solenoid connections.
- Install the card using appropriate ESD precautions.
- Adjust the command value and ramp settings.
- Perform functional testing before returning the hydraulic system to operation.
Incorrect parameter settings can affect valve response, hydraulic movement, and machine performance.
🔹 Maintenance Tips
🛠 Inspect the card connector for contamination or oxidation.
🛠 Verify that the 24 VDC supply remains within the permitted operating range.
🛠 Check the 2 A fuse if the amplifier does not power up.
🛠 Inspect command signal wiring.
🛠 Verify enable input status.
🛠 Check the proportional valve solenoid resistance.
🛠 Confirm actual output current during troubleshooting.
🛠 Review ramp and amplification settings after replacing the amplifier.
🛠 Use ESD protection when handling the electronic card.
Before replacing the amplifier, check the valve, wiring, power supply, and command signal. A hydraulic control problem does not always indicate a defective amplifier card.
🔹 Common Questions
❓ Q: What is the Rexroth VT-VSPA2-1-20/VO/T1?
A: It is an analog valve amplifier card used for controlling compatible proportional hydraulic valves.
❓ Q: What is the material number?
A: The material number is R901002090.
❓ Q: What power supply does it require?
A: The amplifier operates from a nominal 24 VDC power supply.
❓ Q: Can it accept a 4–20 mA command signal?
A: Yes. The amplifier provides a 4–20 mA current command input.
❓ Q: Does it support voltage command signals?
A: Yes. It supports multiple voltage command inputs and a differential input up to ±10 V.
❓ Q: What does the T1 option mean?
A: The T1 version is configured with one adjustable ramp time.
❓ Q: What is the maximum output current?
A: The power output stage is rated for controlled output current up to approximately 2.5 A.
❓ Q: What type of connector does it use?
A: It uses a 48-pin DIN 41612 Type F multipoint connector.
❓ Q: Can it directly replace every VT-VSPA amplifier?
A: No. The complete model code, component series, option code, valve type, wiring, and parameter configuration should be checked before replacement.
❓ Q: Is this a PLC module?
A: No. It is a dedicated analog electronic amplifier designed for proportional hydraulic valve control.
🔹 Typical Applications
🏭 Hydraulic presses
🏭 Injection molding machines
🏭 Metalworking equipment
🏭 Machine tools
🏭 Industrial production machinery
🏭 Test equipment
🏭 Material handling systems
🏭 Hydraulic positioning systems
🏭 Motion-control equipment
🏭 Proportional hydraulic power units
🔹 Related Rexroth Models
1️⃣ VT-VSPA2-1-20/VO/T5 – Analog Valve Amplifier Card
2️⃣ VT-VSPA2-50-1X – Proportional Valve Amplifier
3️⃣ VT-3000 – Hydraulic Valve Amplifier
4️⃣ VT-3006 – Proportional Valve Amplifier Card
5️⃣ VT-3013 – Hydraulic Control Amplifier
6️⃣ VT-3014 – Analog Valve Amplifier
7️⃣ VT-3017 – Proportional Valve Controller
8️⃣ VT-3018 – Analog Hydraulic Amplifier
9️⃣ VT-3026 – Valve Amplifier Card
🔟 VT-3002-1-2X/48F – Open Card Holder
🔹 Product Summary
The Rexroth VT-VSPA2-1-20/VO/T1 | Analog Valve Amplifier Card is designed for precise control of compatible proportional hydraulic directional and pressure valves.
With a 24 VDC supply, multiple voltage command inputs, a 4–20 mA current input, adjustable zero point, ramp control, characteristic curve correction, enable functions, and a controlled output stage, the module is suitable for industrial hydraulic automation systems requiring stable and adjustable valve performance.
For replacement projects, always verify the complete model number, material number R901002090, component series, T1 option, valve compatibility, connector configuration, and existing amplifier settings before installation.
