Description
Key Technical Specifications
| Parameter | OEM specification |
|---|---|
| Operating voltage | 24 VDC |
| Permitted voltage range | 21–30 VDC |
| Maximum current consumption | 3.5 A |
| Communication | PROFIBUS DP-V0 |
| Service interface | RS-232, 9-pin D-Sub |
| Analog voltage inputs | ±10 V or 0–10 V, depending on channel |
| Analog current inputs | 4–20 mA, configurable channels |
| Analog input resolution | 12-bit for current inputs |
| Analog outputs | ±10 V |
| Analog output resolution | 11-bit, 10 mV |
| Digital inputs | Configurable command selection, enable, and operating modes |
| Digital outputs | 7 configurable status outputs |
| Solenoid output | Integrated flow-controlled output stage |
| Maximum solenoid current | 2.5 A per solenoid for specified 4WRE6-2X/822 application |
| Internal measurement frequency | Approximately 5 kHz |
| Control scan time | 2 ms |
| Backplane connector | 64-pin DIN 41612, design G |
| Board dimensions | 100 × 160 mm |
| Front panel height | 128.4 mm |
| Operating temperature | 0 to +50°C |
| Storage temperature | -20 to +70°C |
| Weight | Approximately 0.2 kg |
Product Introduction
The Bosch Rexroth R901089559 VT-VPCD-1-1X/V0/1-P-1 is a digital closed-loop control card designed for electrohydraulic regulation of variable-displacement axial-piston pumps. It integrates swivel-angle control, pressure regulation, proportional valve control, and adjustable power limitation. The electronics receive command signals and actual feedback values from the pump’s position and pressure sensors, then calculate the required valve-control output.
The PROFIBUS DP-V0 interface allows the card to exchange control and process information with a higher-level PLC or industrial automation system. Its integrated output stage drives the proportional valve solenoids, while the RS-232 service interface supports configuration and diagnostics through Bosch Rexroth BODAC software. The controller also supports parameter-set selection, ramp-time adjustment, master/slave operation, leakage compensation, and internal diagnostic functions.
VT-VPCD-1-16V01-P-1 R901089559
Application Scenarios & Field Pitfalls
Typical applications
- Variable-displacement hydraulic pump control in industrial machinery.
- A4VS pump systems using HS4 electrohydraulic control.
- A2V pump systems using EO4 control.
- Hydraulic pressure and flow regulation in industrial presses.
- Injection molding and metal-forming equipment.
- PLC-controlled hydraulic power units using PROFIBUS communication.
Important engineering checks
- Pump control compatibility: Confirm whether the installed pump uses A4VS/HS4 or A2V/EO4 control. The required swivel-angle sensor must also match the selected configuration.
- PROFIBUS configuration: Check the station address, bus termination, cable shielding, and PLC communication parameters. The card reads its configured address after power-up, so address changes require a power cycle.
- Sensor feedback: Incorrect wiring or incompatible pressure and position transducers can cause closed-loop errors or unstable pump response.
- Solenoid output: Verify the proportional valve coil specifications. The 2.5 A maximum rating applies to the documented 4WRE6-2X/822 application, not every possible valve combination.
- Parameter preservation: Back up the original BODAC configuration, including pump size, control parameters, ramp times, and pressure limits before replacing the card.
- Power supply: Allow for the documented maximum 3.5 A current demand at 24 VDC and check the supply under operating load.
- EMC and installation: Use shielded sensor wiring, separate sensor cables from interference sources, and install the card in an approved rack or card holder.
Related Products and Variants
| Material number | Model designation | Difference |
|---|---|---|
| R901089559 | VT-VPCD-1-1X/V0/1-P-1 | PROFIBUS DP-V0 |
| R901044346 | VT-VPCD-1-1X/V0/1-0-1 | No fieldbus connection |
| R901102344 | VT-VPCD-1-1X/V0/1-C-1 | CANopen |
| R901102347 | VT-VPCD-1-1X/V0/1-D-1 | DeviceNet |
| R901078493 | VT-VPCD-1-1X/V100/1-0-1 | Alternative A2V/EO4 sensor configuration; no fieldbus |
These are documented VT-VPCD variants, but their communication interfaces and sensor configurations differ. They should not be considered automatic replacements for R901089559.
Procurement and Quality Control
For purchasing, specify the complete OEM identification:
Bosch Rexroth R901089559 – VT-/V0/1-P-1
Before accepting a replacement, verify:
- Material number R901089559 on the identification label.
- Complete model designation and hardware revision.
- 64-pin connector and front-panel condition.
- PROFIBUS interface operation and station-address configuration.
- RS-232 service communication.
- Analog input and output response.
- Proportional valve output-stage operation.
- Diagnostic status and stored parameter configuration.
For used or refurbished stock, request test evidence covering communication, sensor input processing, and solenoid output operation. A successful power-up test alone does not establish closed-loop hydraulic control performance.
Replacement recommendation: Match the PROFIBUS version, pump-control architecture, sensor type, and original BODAC parameters. Incorrect configuration can affect pump displacement, pressure regulation, and power limitation, potentially causing unsafe hydraulic behavior.
