Description
Product Introduction
The Bosch Rexroth VT5007-17 (catalog number R900579493) is an industrial Eurocard-style electrical amplifier card designed for closed-loop control of direct-operated proportional directional valves equipped with inductive position feedback (such as Rexroth 4WRE 1X series). Operating on standard 24 V DC power, it digitizes and regulates command inputs into precise current-controlled driver outputs.
The board integrates differential command inputs, a multi-potentiometer ramp generator, spool position control loop logic, and an LVDT oscillator/demodulator circuit with cable-break monitoring. Installing into 19-inch rack subframes, the VT5007-17 ensures smooth, repeatable hydraulic cylinder and motor motion across high-precision metal forming, plastic injection molding, and heavy industrial press machinery.
Key Technical Specifications
| Parameter | Value / Feature |
| Manufacturer | Bosch Rexroth / Mannesmann Rexroth / Indramat |
| Product Line | VT-5000 Series Amplifier Cards |
| Model Code | VT5007-17 / VT5007-17B (Part Number: R900579493) |
| Compatible Valves | Proportional directional valves with LVDT feedback (e.g., 4WRE series) |
| Operating Voltage | 24 V DC (21 V DC to 35 V DC range) |
| Signal Inputs | Differential inputs (±10V / 0-10V / 4-20mA options) |
| Ramp Generator | Integrated adjustable ramp times via front-panel potentiometers |
| Output Drivers | Two clocked current-controlled solenoid output stages |
| Feedback Processing | Onboard LVDT oscillator/demodulator with line-break detection |
| Form Factor | 32-pin / 64-pin DIN Eurocard plugin module |
Application Scenarios & The “Trench” Experience
An injection molding machine loses proportional speed control during the mold clamp cycle, causing severe mechanical shock and flashing on finished parts. Diagnostic testing shows the internal LVDT demodulator circuit on the original amplifier card has drifted, causing the valve spool position loop to report incorrect feedback. Replacing the card with a bench-tested Bosch Rexroth VT5007-17 module restores precise closed-loop spool position tracking and smooth deceleration ramps within minutes, avoiding unplanned press downtime.
- Metal Stamping & Forging Presses: Regulates hydraulic press speed, pressure buildup, and slide positioning.
- Plastic Injection Molding Machines: Controls clamp stroke speed, core pulls, and injection velocity profiles.
- Pulp & Paper Processing: Regulates hydraulic cylinder nip rolls and web tension control valves.
- Hydroelectric Gate Drives: Provides stable, closed-loop position tracking for heavy hydraulic dam gates.
VT5007-17
VT5007-17
Transparency SOP: Quality Assurance & Testing
- Inbound Mechanical Audit: Inspect the front panel potentiometers, check backplane 32-pin/64-pin DIN gold edge pins for bending or oxidation, and inspect board capacitors for swelling.
- Benchtop Power & POST Check: Apply 24 V DC supply power; verify onboard regulator voltages, logic rails, and front-panel Enable/Readiness LED status.
- LVDT Simulator & Spool Loop Test: Connect an LVDT position simulator to the feedback terminals; sweep inputs to confirm LVDT demodulator accuracy and trigger cable-break fault logic.
- Current Output & Ramp Calibration: Drive simulated command signals (0–10V); verify output solenoid current ramps on an oscilloscope across all potentiometer settings.
- ESD Protection & Packaging: Vacuum-seal inside anti-static shielding bags, cushion with customized foam inserts, and ship in a heavy-duty export carton.
The Veteran’s Tech Trap Guide (Crucial Value-Add)
- ⚠️ Do Not Force the Card into Backplane Racks: Eurocard edge connectors use fine-pitch DIN pins. Align the card top and bottom rails before pushing in the card; forcing an unaligned board will bend the backplane pins.
- ❗ Match Ramp & Gain Potentiometer Settings: When replacing a VT5007-17 card, measure and copy the multi-turn potentiometer positions (Ramp times, Zero adjustment, Gain) from your original board before starting up the system to avoid sudden machine acceleration.
- ⚠️ Observe LVDT Wiring Shielding: Transducer feedback lines operate on high-frequency AC signals from the onboard oscillator. Shielding must be grounded at the amplifier card chassis terminal only; dual-grounding causes ground loops that generate spool oscillation.
- ❗ Verify “Enable” Interlock Voltage: The VT5007-17 requires an active logic signal (typically > 8.5 V DC) on the Enable pin to energize the output driver stages. Missing Enable signal keeps the card in standby mode with zero solenoid output.
Frequently Asked Questions (FAQ)
Q: What is the main difference between Rexroth VT5007 and VT5005 series amplifier cards?
A: The VT5007 includes integrated multi-potentiometer ramp generators for configurable acceleration/deceleration timing, whereas basic VT5005 cards typically omit multi-time ramp control options.
Q: Can the VT5007-17 drive valves without electrical position feedback (LVDT)?
A: No. The VT5007-17 is specifically designed for valves with internal LVDT position feedback transducers (e.g., 4WRE series). Using it on non-feedback valves will trigger a position error fault.
Q: How do I know if the LVDT cable is damaged or disconnected?
A: The onboard cable-break detection logic monitors LVDT carrier signals. If a lead breaks or short-circuits, the card de-energizes the solenoid output stages and drops the “Readiness” LED signal.
Q: Is the VT5007-17 card hot-swappable in a live rack?
A: No. Always disconnect power to the 19-inch rack frame before removing or inserting amplifier cards to prevent backplane arching and component damage.
Q: What warranty applies to this surplus Rexroth module?
A: All clean surplus and bench-tested Bosch Rexroth VT5007-17 amplifier cards carry a full 12-month replacement warranty from the delivery date.
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