Bosch Rexroth DM-51 – Compact AC Servo Amplifier Module | Indramat Drive Platform
Engineering Background: The DM-51 is part of Bosch Rexroth’s legacy Indramat servo drive family, engineered for precision motion control in demanding industrial automation environments. Designed to pair with Indramat MDD/MKD/MHD series servo motors, the DM-51 delivers deterministic torque and velocity response critical for CNC, robotics, and high-cycle assembly lines.
Product Positioning: As a compact, single-axis AC servo amplifier, the DM-51 occupies the mid-range power tier of the Indramat DM series. It is the preferred replacement and spare unit for machine builders and maintenance engineers managing legacy Rexroth motion systems without full drive replacement.
Complete Technical Specifications
- Model / SKU: DM-51
- Brand: Bosch Rexroth (Indramat)
- Series / Platform: Indramat DM Series – AC Servo Drive
- Drive Type: AC Servo Amplifier (single-axis)
- Compatible Motors: Indramat MDD, MKD, MHD series AC servo motors
- Control Interface: Analog ±10 V / digital fieldbus (application-dependent)
- Feedback: Resolver / encoder (motor-dependent)
- Operating Voltage: 3-phase AC input (application-specific; consult datasheet)
- Weight: 4.8 kg
- Country of Origin: Germany
- Condition: Surplus / Refurbished (tested before shipment)
- Warranty: 12-month Konmask quality guarantee
Proven Application Environments
- CNC machining centers (milling, turning, grinding)
- Industrial robots and gantry systems
- Injection molding machines
- Automated assembly and pick-and-place lines
- Printing and packaging machinery
- Semiconductor and electronics manufacturing equipment
Engineering Advantages
- Drop-in Replacement: Direct form-fit-function substitute for existing DM-51 units in Indramat drive cabinets — no firmware reconfiguration required in most applications.
- Deterministic Response: Closed-loop servo control delivers sub-millisecond torque response, maintaining positioning accuracy under variable load conditions.
- Compact Footprint: Slim module profile optimizes cabinet space utilization in retrofit and expansion projects.
- Proven Reliability: Indramat DM series drives are field-proven across 20+ years of global industrial deployment, with extensive spare-parts ecosystems.
- Broad Motor Compatibility: Supports the full Indramat MDD/MKD/MHD motor range, simplifying multi-axis system standardization.
System Architecture & Signal Flow
The DM-51 operates within the Indramat modular drive architecture. The power supply module (e.g., TVD or TVM series) feeds DC bus voltage to the DM-51 amplifier module. The amplifier receives velocity/torque commands via the analog or digital interface from the CNC/PLC controller, closes the servo loop using motor feedback (resolver or encoder), and outputs PWM-controlled three-phase current to the servo motor. Fault diagnostics are reported via front-panel LED codes and, where applicable, fieldbus status registers.
Sourcing & Quality Verification
- Source: Verified surplus from decommissioned OEM production lines and authorized distributors.
- Inspection: Each unit undergoes visual inspection, power-on functional test, and parameter verification prior to shipment.
- Traceability: Serial number and firmware version recorded for each unit shipped.
- Packaging: Anti-static ESD packaging with foam cushioning; export carton rated for international freight.
- Certifications: CE marked (original OEM certification); RoHS compliance per original Rexroth documentation.
Procurement Process
- Confirm Compatibility: Provide your existing drive serial number or motor model to our engineers for cross-reference verification.
- Request Quote: Contact [email protected] or submit an RFQ via the product page for volume pricing.
- Order & Payment: Secure checkout via Shopify Payments; T/T wire transfer available for B2B orders.
- Shipping: DHL / FedEx express worldwide; sea freight available for bulk orders. Lead time: 1–3 business days after payment confirmation.
- After-Sales: 12-month warranty; technical support via email and phone throughout the warranty period.
Technical FAQ
Q: Is the DM-51 compatible with my existing Indramat power supply module?
A: The DM-51 is designed for use with Indramat TVD/TVM/KDV series power supply modules. Please share your cabinet configuration for confirmation.
Q: Can the DM-51 be used with non-Indramat servo motors?
A: The DM-51 is optimized for Indramat MDD/MKD/MHD motors. Use with third-party motors requires careful feedback and parameter matching — contact our engineers before ordering.
Q: What fault codes does the DM-51 display?
A: The DM-51 uses a front-panel LED/display diagnostic system. Common codes include F2xx (motor feedback faults), F4xx (power stage faults), and F8xx (communication faults). Full fault code tables are available in the Indramat DM Series Service Manual.
Q: Do you provide the original Rexroth documentation?
A: Yes. Digital copies of the DM Series installation and parameter manual are available upon request with purchase.
Q: What is the minimum order quantity?
A: MOQ is 1 unit. Volume discounts apply for orders of 3+ units.
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