Siemens C98043-A7100-L103 / 6RY1803-0AA20-0AA1 – Thyristor Firing Control Board | SIMOREG DC Master Platform
The Siemens C98043-A7100-L103 (order number 6RY1803-0AA20-0AA1) is a precision thyristor firing control board engineered for the Siemens SIMOREG DC Master drive platform. As the core pulse generation and synchronization interface between the digital CUD controller and the power thyristor bridge, this board is critical to maintaining precise DC output voltage and torque regulation in demanding industrial drive systems.
Procurement engineers sourcing replacement or spare boards for SIMOREG 6RA70 / 6RA24 series drives will find this component essential for minimizing unplanned downtime and sustaining production continuity. At Konmask.com, every unit is sourced through verified industrial supply channels and undergoes functional bench testing before dispatch.
Complete Technical Specifications
- Part Number: C98043-A7100-L103
- Order Number (MLFB): 6RY1803-0AA20-0AA1
- Manufacturer: Siemens AG
- Product Family / Platform: SIMOREG DC Master
- Compatible Drive Series: 6RA70, 6RA24
- Board Function: Thyristor firing pulse generation & AC supply synchronization
- Pulse Output: Six-pulse / twelve-pulse gate signal generation
- Interface: Internal drive bus / ribbon connector to CUD and power section
- Form Factor: PCB plug-in module (EuroCard format)
- Hardware Revision: L103
- Supply Voltage: Per SIMOREG drive backplane specification
- Weight: Approx. 500 g
- Country of Origin: Germany
- RoHS Compliance: Per Siemens product documentation
- HS Code: 8537.10
Proven Application Environments
- Steel rolling mills and continuous casting lines
- Paper and pulp machine main drive systems
- Overhead crane and hoist DC drive control
- Extruder, winder, and unwinder drive applications
- Mining conveyor and hoisting equipment
- Marine propulsion auxiliary DC drives
- Cement kiln and rotary drum drive systems
Engineering Advantages
- Precise Firing Angle Control (α): Ensures stable DC output voltage regulation across the full load range, critical for speed and torque accuracy
- Phase-Locked Synchronization: Pulse generation locked to AC supply frequency minimizes harmonic disturbance and commutation failures
- Direct OEM Drop-In Replacement: Full mechanical and electrical compatibility with SIMOREG 6RA70 / 6RA24 drive chassis — no modification required
- Robust Industrial PCB Design: Conformal-coated board construction suitable for industrial ambient conditions including humidity and vibration
- Emergency Maintenance Ready: Stocked and ready-to-ship to minimize critical drive downtime
- Revision-Matched Supply: L103 hardware revision documented and verified against drive compatibility matrix
System Architecture & Signal Flow
Within the SIMOREG DC Master architecture, the C98043-A7100-L103 board occupies the firing board slot in the drive chassis. It receives firing angle commands (α) from the main CUD (Central Unit Drive) controller via the internal drive bus. The board generates six-pulse or twelve-pulse thyristor gate signals, phase-synchronized to the incoming AC supply. Gate pulses are delivered to the thyristor power bridge with low latency, enabling tight closed-loop speed and torque regulation.
Signal Flow: CUD Controller → C98043-A7100-L103 Firing Board → Thyristor Gate Drivers → Power Bridge (SCR) → DC Motor Armature
Sourcing & Quality Verification
- Supply Channel: Authorized industrial surplus and OEM-certified distribution networks
- Inspection Protocol: Visual inspection + functional bench test on SIMOREG-compatible test rig
- Condition: New surplus or refurbished-to-specification (condition stated per order confirmation)
- Traceability: Siemens part marking and revision label verified; serial number documented on request
- Packaging: Anti-static ESD bag + foam-padded export carton with desiccant
- Warranty: 12-month functional warranty from Konmask.com from date of dispatch
Procurement Process
- Submit inquiry via this product page or email [email protected] with your drive model, serial number, and required quantity
- Receive stock confirmation and proforma invoice within 1 business day
- Payment via T/T bank transfer, PayPal, or trade finance terms for qualified buyers
- Dispatch within 2–5 business days; DHL / FedEx international express available
- Receive functional test report and packing list with shipment documentation
Technical FAQ
Q: Is C98043-A7100-L103 compatible with both 6RA70 and 6RA24 series drives?
A: Yes. This firing board is designed for the SIMOREG DC Master platform covering both the 6RA70 and 6RA24 drive families. Always verify your drive’s exact board slot configuration and firmware version against the SIMOREG service manual before installation.
Q: What does the L103 hardware revision suffix indicate?
A: The L103 suffix denotes a specific PCB hardware revision level. Ensure the revision matches your drive’s firmware and hardware compatibility matrix as documented in the Siemens SIMOREG service documentation (e.g., 6RX1700-0AD76).
Q: What is the difference between part number C98043-A7100-L103 and the order number 6RY1803-0AA20-0AA1?
A: The C98043-A7100-L103 is the Siemens internal component part number (board-level identifier), while 6RY1803-0AA20-0AA1 is the MLFB order number used for procurement through Siemens distribution channels. Both refer to the same physical board.
Q: Can Konmask provide a functional test report?
A: Yes. A functional test report is available upon request for all units shipped from Konmask.com. Contact us at the time of order to include this with your shipment documentation.
Q: What is the lead time for bulk orders (>5 units)?
A: Contact us at [email protected] or +0086 19859288691 for bulk availability, lead time, and volume pricing.
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Contact: [email protected] | +0086 19859288691
