SIEMENS 6SA8252-0AC61 – DC Drive Control Unit | SIMOREG DC Master Platform
Engineering Background
The SIEMENS 6SA8252-0AC61 is a dedicated control unit designed for the SIMOREG DC Master series of fully digital DC drive converters. SIMOREG DC Master (6RA70 / 6SA82 series) represents Siemens’ flagship platform for high-performance DC motor speed and torque control in demanding industrial environments. This control board serves as the intelligence core of the drive system, executing closed-loop regulation, field bus communication, and diagnostic functions.
Product Positioning
Engineered for OEM machine builders, system integrators, and maintenance engineers who require a drop-in replacement or upgrade control board for existing SIMOREG DC Master installations. The 6SA8252-0AC61 eliminates the need for full drive replacement, significantly reducing downtime and capital expenditure in retrofit and repair scenarios.
Complete Technical Specifications
| Part Number / SKU | 6SA8252-0AC61 |
| Manufacturer | Siemens AG |
| Product Series | SIMOREG DC Master (6SA82xx) |
| Component Type | Control Unit / Regulator Board |
| Drive Platform Compatibility | SIMOREG DC Master 6RA70 / 6SA82 Series |
| Control Technology | Fully Digital, Microprocessor-Based |
| Regulation Mode | Speed Control, Torque Control, EMF Control |
| Communication Interface | PROFIBUS-DP (optional via CBP2), USS Protocol |
| Analog Inputs | Multiple differential analog inputs (±10 V) |
| Digital I/O | Programmable digital inputs and relay outputs |
| Encoder Interface | Incremental encoder input (HTL/TTL) |
| Parameterization | Via PMU operator panel, OP1S, or DriveMonitor software |
| Diagnostic Features | Fault/alarm memory, LED status indicators, parameter logging |
| Mounting | Internal board assembly, DIN rail compatible chassis |
| Operating Temperature | 0 °C to +55 °C |
| Storage Temperature | -25 °C to +70 °C |
| Humidity | 5% to 95% RH, non-condensing |
| Country of Origin | Germany |
| Weight (approx.) | 2.0 kg |
| Compliance | CE, UL, cUL |
Proven Application Environments
- Steel & Metal Processing: Rolling mills, wire drawing machines, coiler/decoiler drives requiring precise torque regulation
- Paper & Printing Industry: Web tension control, winder/unwinder systems with dynamic speed response
- Mining & Hoisting: Hoist drives, conveyor systems demanding high reliability and fault-tolerant operation
- Marine & Offshore: Winch drives, anchor handling equipment in harsh environments
- Plastics & Extrusion: Extruder main drives requiring smooth torque delivery and precise speed control
- Crane & Lifting Equipment: Bridge cranes, overhead cranes with regenerative braking requirements
- Test Bench Systems: Dynamometer and load simulation applications
Engineering Advantages
- Fully Digital Control: Eliminates analog drift; all parameters stored in non-volatile memory for consistent, repeatable performance
- Adaptive Optimization: Built-in auto-optimization routines for speed controller, current controller, and field weakening
- Seamless Retrofit: Direct board-level replacement for compatible SIMOREG DC Master chassis — no rewiring of power section required
- Comprehensive Diagnostics: Fault history log, real-time parameter monitoring, and scope function via DriveMonitor
- Flexible Setpoint Sources: Analog, digital, fieldbus, or motorized potentiometer — all configurable via parameters
- Field Weakening: Integrated field current controller for extended speed range operation above base speed
- Regenerative Capability: Supports 4-quadrant operation when paired with appropriate power section
System Architecture & Signal Flow
The 6SA8252-0AC61 control unit interfaces directly with the SIMOREG DC Master power section. Signal flow proceeds as follows:
- Setpoint Input: Speed or torque reference received via analog input, USS/PROFIBUS, or internal fixed setpoints (P-parameters)
- Speed Controller: PID speed regulator compares actual speed (from tachometer or encoder) with setpoint; outputs current reference
- Current Controller: Inner current loop regulates armature current via firing angle control of thyristor bridge
- Field Controller: Separate field current regulation maintains optimal flux; enables field weakening above base speed
- Gate Pulse Generation: Synchronized firing pulses dispatched to thyristor gate drivers in power section
- Feedback & Protection: Continuous monitoring of current, voltage, temperature; fault response within microseconds
Sourcing & Quality Verification
All units offered by Konmask.com are sourced through verified industrial supply channels. Each 6SA8252-0AC61 unit undergoes the following verification process before dispatch:
- Visual inspection: PCB integrity, connector condition, component seating
- Label verification: Siemens OEM part number, date code, and serial number cross-check
- Functional bench test where applicable (tested units clearly indicated)
- Anti-static packaging with humidity indicator card
- Full traceability documentation available on request
New, surplus-new, and refurbished grades available. Grade clearly stated at time of quotation.
Procurement Process
- Confirm Part Number: Verify 6SA8252-0AC61 against your drive nameplate or Siemens documentation
- Request Quote: Contact support@konmask.com or call +0086 19859288691 for pricing, availability, and lead time
- Order Confirmation: Purchase order issued; payment terms confirmed (T/T, L/C, or platform payment)
- Inspection & Dispatch: Unit inspected, packed, and shipped with tracking; DHL / FedEx / sea freight options available
- After-Sales Support: Technical assistance available post-delivery for installation and commissioning queries
Technical FAQ
Q: Is the 6SA8252-0AC61 compatible with all SIMOREG DC Master drives?
A: It is designed for the 6SA82xx control board slot. Compatibility depends on the specific drive chassis variant. Please provide your full drive nameplate data for confirmation before ordering.
Q: Can parameters from the old board be transferred to the replacement unit?
A: Yes. Parameters can be uploaded from the old board via DriveMonitor or OP1S operator panel and downloaded to the new unit. Konmask technical team can advise on the procedure.
Q: What is the typical lead time?
A: In-stock units ship within 1–3 business days. Ex-stock or sourced units typically 5–15 business days depending on origin. Contact us for real-time availability.
Q: Do you provide a warranty?
A: Yes. All units carry a minimum 90-day warranty against defects in materials and workmanship. Extended warranty options available on request.
Q: Can you assist with installation and commissioning?
A: Remote technical support is available. For on-site commissioning in select regions, please inquire directly.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
