Description
Bosch Rexroth VT-VSPD-1-23/V0/1-0-1 | Digital Proportional Valve Amplifier
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | VT-VSPD-1-23/V0/1-0-1 |
| Manufacturer | Bosch Rexroth |
| Product Family | VT-VSPD-1 |
| Product Type | Digital proportional valve amplifier |
| Valve Type | Proportional valve without electronic position feedback |
| Hardware Format | Euro-card |
| Card Dimensions | 100 × 160 mm platform |
| Nominal Supply | 24 VDC platform value; verify exact suffix |
| Command Signal | Configuration-dependent analog command input |
| Solenoid Output | Proportional solenoid drive; valve-dependent |
| Digital Inputs | Command selection / enable functions depending configuration |
| Diagnostic Functions | Status and fault monitoring |
| Serial Interface | Platform documentation includes RS-485 / service communication on applicable versions |
| Operating Temperature | 0 to 50°C for documented VT-VSPD platform |
| Storage Temperature | -20 to +70°C for documented VT-VSPD platform |
| Approx. Weight | About 0.2 kg for documented VT-VSPD-1 hardware |
| Position Feedback | Not intended for electronic valve-position feedback |
The broader VT-VSPD documentation specifies a 100 × 160 mm Euro-card, 24 VDC supply, 0–50°C operating range, -20 to +70°C storage range and approximately 0.2 kg weight. Earlier VT-VSPD documentation also describes selectable analog command inputs, solenoid output control, ramp functions, diagnostics and RS-485 communication. These are family-level specifications, not all independently verified for the exact VT-VSPD-1-23/V0/1-0-1 ordering code.
Product Introduction
The Bosch Rexroth VT-VSPD-1-23/V0/1-0-1 is a digital valve amplifier used to control proportional hydraulic valves that do not provide electronic position feedback. It converts the commanded control signal into a regulated solenoid drive signal, making it part of the electrical-to-hydraulic interface between a machine controller and the proportional valve. Rexroth specifically lists the VT-VSPD family for proportional-valve applications without electronic position feedback.
This is a hydraulic motion-control electronics module, not a PLC analog output card. Its actual behavior depends on the selected valve, solenoid characteristics, command scaling, ramp settings, dither and enable logic. A replacement therefore has to be matched to the valve and the original amplifier configuration rather than evaluated only by physical card dimensions.
VT-VSPD-1-23/V0/1-0-1
Application Scenarios & Field Pitfalls — The Engineer’s Perspective
Engineering Pain Point
The common failure during replacement is treating the VT-VSPD as a generic 0–10 V or 4–20 mA amplifier. The command input is only one part of the control loop. The amplifier’s output stage, solenoid current range, ramp behavior, dither characteristics and valve-specific settings determine the hydraulic response. A card that powers up correctly can still produce incorrect cylinder speed, pressure response or directional behavior if its configuration does not match the original machine.
Typical Applications
- Hydraulic proportional valve control in industrial machinery.
- Variable pump displacement control, where proportional solenoids require an external electronic amplifier. Rexroth documentation specifically lists VT- as an available digital amplifier for proportional pump controls.
- Machine hydraulic motion systems requiring controlled flow, pressure or actuator movement.
- Legacy Rexroth hydraulic control cabinets using Euro-card electronics.
Technical Pitfalls to Avoid
- Verify the complete ordering code.
The difference betweenVT--23/V0/1-0-1and another VT-VSPD variant is not cosmetic. The exact hardware/version code should be matched before replacement. - Do not substitute the VT-VRPD family.
VT-VSPD is intended for proportional valves without electronic position feedback, while VT-VRPD products are associated with valves having electrical position feedback. The control architecture is different. - Match the solenoid characteristics.
Rexroth’s hydraulic documentation shows that proportional solenoids can have defined control-current ranges, nominal resistance and dither requirements. These values vary with the controlled valve, so they should come from the valve documentation rather than being guessed from the amplifier model. - Check command-signal wiring before powering the card.
VT-VSPD documentation includes analog command inputs and configurable control functions. A voltage-input configuration and a current-input configuration are not interchangeable simply because both are described as “analog command.” - Preserve ramp and tuning parameters.
Ramp settings affect how quickly the hydraulic command changes. Losing these settings can produce a machine response that looks like a mechanical or valve problem even though the hydraulic hardware is healthy. - Check the hydraulic valve before condemning the amplifier.
A sticking spool, contaminated oil, incorrect solenoid coil resistance or mechanical actuator problem can produce symptoms similar to an amplifier fault.
Related Products
- Bosch Rexroth VT–22/V0/0-0-1 — Closely related VT-VSPD digital proportional amplifier configuration. Its published data includes 24 VDC supply, 4–20 mA input capability and configurable ramp times, but the suffix differs from the subject unit.
- Bosch Rexroth VT–24/V0/1-0-1 — Same VT-VSPD family with a different configuration code; exact interchangeability should be verified.
- Bosch Rexroth VT–21/V0/0-0-1 — Earlier/related VSPD configuration used as a digital proportional valve amplifier.
- Bosch Rexroth VT-VSPA1 — Analog proportional amplifier family; functionally related but based on analog rather than the VT-VSPD digital architecture.
- Bosch Rexroth VT-MSPA1 — Modular analog amplifier family used for proportional valve control; physical and electrical architecture differs from the Euro-card VT-VSPD.
- Bosch Rexroth VT-VRPD-1 — Digital amplifier family intended for proportional valves with electrical position feedback; not an automatic replacement for VT-VSPD.
- Bosch Rexroth VT-VRPD-2 — Related digital amplifier for feedback-equipped proportional valve applications.
- Bosch Rexroth VT3006 — Proportional valve amplifier family for applications without electrical position feedback, but with a different electronics platform and configuration.
Procurement and Replacement Note
For procurement, specify the complete VT–23/V0/1-0-1 designation and photograph or record the original card label. The exact public documentation for this suffix is limited, while closely related VT-VSPD configurations have different command-input and parameter arrangements.
Before replacement, verify the controlled valve model, solenoid coil resistance/current range, command signal type, enable logic, ramp/dither settings, card carrier, connector pinout and any RS-485/service configuration. Do not select a replacement solely because it is another VT- card.
The available records confirm the product family and function, but I would not publish a definitive output-current range, exact input configuration, or material number for this particular suffix without the original Rexroth nameplate or applicable ordering-code sheet.
