RELIANCE ELECTRIC 57552-4A (57552-4) – DC Drive Controller | FlexPak Series
Engineering Background: The RELIANCE ELECTRIC 57552-4A is a precision DC drive controller engineered for demanding industrial motion control applications. Designed under Reliance Electric’s legacy FlexPak platform, this unit delivers reliable armature voltage regulation and speed control for DC motor systems in continuous-duty environments.
Product Positioning: Targeted at maintenance engineers, OEM integrators, and procurement specialists requiring a direct replacement or upgrade component for existing Reliance Electric drive systems. The 57552-4A (also catalogued as 57552-4) is a proven solution for steel mills, paper machines, extruders, and heavy-duty conveyor systems where precise torque and speed control are non-negotiable.
Complete Technical Specifications
- Part Number: 57552-4A / 57552-4
- Manufacturer: RELIANCE ELECTRIC (Rockwell Automation)
- Series / Platform: FlexPak DC Drive Series
- Device Type: DC Drive Controller / Armature Voltage Regulator
- HS Code: 850440
- Weight: 740 g (approx.)
- Country of Origin: United States
- Condition: New / Surplus / Refurbished (specify at inquiry)
- Warranty: 12-month functional warranty (Konmask standard)
Proven Application Environments
- Steel rolling mills and continuous casting lines
- Paper and pulp processing machinery
- Plastic extrusion and injection molding equipment
- Heavy-duty conveyor and hoist systems
- Mining and mineral processing drives
- Marine and offshore DC motor control panels
Engineering Advantages
- Direct drop-in replacement for existing FlexPak drive systems — zero re-engineering required
- Stable armature voltage regulation under variable load conditions
- Robust construction rated for continuous industrial duty cycles
- Compatible with standard Reliance Electric field excitation and feedback modules
- Reduces unplanned downtime with immediate availability from Konmask inventory
System Architecture & Signal Flow
The 57552-4A operates as a closed-loop DC drive controller within the FlexPak architecture. It receives speed reference signals (analog or digital depending on configuration), processes feedback from a tachometer or encoder, and outputs regulated armature voltage to the DC motor. The controller interfaces with the FlexPak regulator board and optional I/O expansion modules, supporting both standalone and DCS-integrated control topologies.
- Input Reference: Analog speed/torque setpoint (±10 VDC typical)
- Feedback: Tachometer generator or armature voltage feedback
- Output: Regulated DC armature voltage to motor
- Communication: Compatible with Reliance AutoMax and third-party DCS via analog I/O
Sourcing & Quality Verification
- All units sourced from authorized distributors, OEM surplus, or certified refurbishers
- Pre-shipment inspection: visual, dimensional, and functional bench test
- Serialization and lot traceability maintained for every unit
- Counterfeit-prevention protocol: cross-referenced against Rockwell Automation part databases
- Packaging: anti-static ESD bag + foam-lined export carton
Procurement Process
- Submit RFQ via Konmask.com or email support@konmask.com
- Receive availability confirmation and lead time within 24 business hours
- Review and approve proforma invoice
- Payment via T/T, PayPal, or approved credit terms
- Shipment with full documentation: packing list, COO, test report, and tracking
Technical FAQ
Q: Is the 57552-4A interchangeable with 57552-4?
A: Yes. The suffix “A” denotes a minor revision; both part numbers are functionally and dimensionally equivalent for most applications. Confirm with your system documentation before installation.
Q: What DC motor ratings is this controller compatible with?
A: Compatibility depends on the full FlexPak drive stack configuration. Contact Konmask engineering support with your motor nameplate data for a compatibility assessment.
Q: Do you provide installation and commissioning support?
A: Konmask provides technical documentation packages and remote commissioning guidance. On-site support can be arranged through our partner network.
Q: What is the lead time for this part?
A: Standard lead time is 3–7 business days for in-stock units. Ex-stock shipment available for urgent requirements — contact us for priority processing.
Q: Can I return the unit if it does not match my application?
A: Yes, subject to Konmask’s 30-day return policy for uninstalled, undamaged units. See our Returns Policy page for full terms.
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