SIEMENS 6RY1703-1HD02 – DC Drive Control Unit | SIMOREG DC-MASTER Platform
Engineering Background: The SIMOREG DC-MASTER series represents Siemens’ flagship fully digital DC drive platform, engineered for demanding industrial applications requiring precise speed and torque control of DC motors. The 6RY1703-1HD02 (board assembly C98043-A7021-L1-3) is the core control unit responsible for closed-loop regulation, field excitation management, and system communication within the SIMOREG 6RA70 drive family.
Product Positioning: This control unit is a direct OEM replacement and upgrade component for Siemens SIMOREG 6RA70 series DC converters. It is the preferred sourcing choice for maintenance engineers, OEM integrators, and plant automation teams requiring a verified, drop-in replacement with full firmware compatibility.
Complete Technical Specifications
- Part Number: 6RY1703-1HD02
- Board Assembly: C98043-A7021-L1-3
- Platform: SIMOREG DC-MASTER (6RA70 Series)
- Function: Fully digital closed-loop DC drive control unit
- Control Mode: Speed control / Torque control (selectable)
- Field Supply: Integrated field excitation control
- Communication: Compatible with PROFIBUS-DP, USS protocol (via CBP2/CBD modules)
- Inputs/Outputs: Analog and digital I/O via terminal block interface
- Firmware: Compatible with SIMOREG 6RA70 firmware versions
- Mounting: Direct plug-in replacement for 6RA70 series power section
- Weight: Approx. 1,500 g
- Country of Origin: Germany
Proven Application Environments
- Steel rolling mills and wire drawing machines
- Paper and printing machine drives
- Crane and hoist drive systems
- Extruder and winding/unwinding lines
- Mining conveyor and elevator drives
- Test bench and dynamometer systems
- Marine propulsion auxiliary drives
Engineering Advantages
- Fully Digital Control: Eliminates analog drift; ensures repeatable, stable performance across temperature and load cycles
- Integrated Field Weakening: Enables extended speed range operation without external field controller hardware
- Plug-and-Play Replacement: Direct board-level swap for 6RA70 series — no mechanical modification required
- Parameterization via STARTER/DriveMonitor: Full parameter set accessible via Siemens commissioning tools
- Diagnostic LED Array: Onboard fault indication for rapid field troubleshooting
- Long Service Life: Industrial-grade PCB with conformal coating for humidity and vibration resistance
System Architecture & Signal Flow
The 6RY1703-1HD02 control board interfaces directly with the 6RA70 power section via a standardized backplane connector. The control unit receives speed feedback from a tachogenerator or encoder, processes the closed-loop PID algorithm in real time, and outputs firing pulses to the thyristor bridge. Field current is regulated via a separate field supply circuit on the same board. All setpoints, limits, and diagnostic data are accessible via the serial interface or optional fieldbus adapter.
Sourcing & Quality Verification
- Source: Sourced from authorized Siemens distribution channels and verified industrial surplus
- Inspection: Each unit undergoes visual inspection, board-level continuity check, and functional verification prior to shipment
- Condition: New / Refurbished-to-OEM-spec (specified at time of order confirmation)
- Traceability: Siemens date code and revision markings preserved; no remarking or relabeling
- Packaging: ESD-safe anti-static bag + foam-lined carton for international transit
Procurement Process
- Submit your order or RFQ via Konmask.com product page
- Receive order confirmation with lead time and condition declaration within 1 business day
- Payment via T/T, PayPal, or approved credit terms for qualified accounts
- Shipment via DHL / FedEx / UPS with full tracking; export documentation provided
- Post-delivery technical support available via email or WhatsApp
Technical FAQ
Q: Is this compatible with all 6RA70 variants?
A: The C98043-A7021-L1-3 board is designed for specific 6RA70 power ratings. Please confirm your drive’s full model number before ordering to ensure compatibility.
Q: Can the parameters from the old board be transferred?
A: Yes. Using Siemens STARTER or DriveMonitor software, parameters can be uploaded from the old unit and downloaded to the replacement board prior to installation.
Q: What warranty is provided?
A: Konmask.com provides a 90-day functional warranty on all verified units. Extended warranty available upon request.
Q: Do you provide installation support?
A: Yes. Our engineering team can provide remote commissioning guidance and parameter backup/restore support.
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