Description

The RELIANCE ELECTRIC S-D4007 is a robust 400V-class variable frequency drive designed for precision control of three-phase induction motors up to 7.5 HP (5.5 kW) in demanding industrial environments. As part of Reliance Electric’s FlexPak® 3000 series – now integrated into Rockwell Automation’s PowerFlex® ecosystem – this drive delivers exceptional 7A output current with advanced sensorless vector control for ±0.2% speed regulation accuracy. The S-D4007 features adaptive torque algorithms that automatically compensate for load variations, making it ideal for high-inertia applications like centrifugal pumps, conveyor systems, and machine tool spindles. Its modular architecture supports optional communication cards (DeviceNet, Profibus, Ethernet/IP) for seamless integration with Rockwell ControlLogix PLCs while maintaining NEMA 1/IP20 protection against dust ingress. With patented harmonic mitigation technology and 150% overload capacity for 60 seconds, the RELIANCE ELECTRIC S-D4007 optimizes energy efficiency while reducing mechanical stress during acceleration/deceleration cycles in continuous process operations.

RELIANCE ELECTRIC S-D4007

Technical Specifications

Main Features and Advantages

Precision Motion Control: Patented Auto-Tune algorithms in the S-D4007 identify motor parameters for optimal torque production, maintaining ±0.2% speed accuracy even at 0.5 Hz for critical applications like extruder feed screws.
Dynamic Energy Optimization: Automatic slip compensation adjusts V/f curves in real-time, reducing energy consumption by 15-30% in centrifugal pump/fan applications compared to constant torque drives.
Advanced Protection Suite: Integrated motor thermal modeling prevents winding damage, while DC bus overvoltage control enables regenerative braking without external modules. Phase-loss detection safeguards against input power faults.
Flexible Integration: Supports Rockwell’s 20-COMM communication cards for seamless ControlNet, DeviceNet, or EtherNet/IP connectivity. Drive Executive software enables remote parameter cloning across multiple S-D4007 units.
Enhanced Diagnostics: 4-line LCD displays real-time I/O status, power metrics (kWh, PF), and fault history with time-stamped records for predictive maintenance.

Application Field

The S-D4007 excels in variable torque and constant torque applications:

Water Treatment: Speed control of raw water intake pumps with quadratic V/f curves for affinity law optimization

Material Handling: Synchronized conveyor belt systems requiring torque-matched acceleration to prevent slippage

HVAC: Building pressure control via inline fans using PID feedback from pressure transmitters

Machine Tools: Spindle drives for CNC lathes with dynamic braking for rapid tool reversal

Food Processing: Washdown-compatible versions for mixer speed regulation in hygienic environments

Packaging: Tension control in film extrusion lines with active inertia compensation

RELIANCE ELECTRIC S-D4007

Related Products

S-D4006: 6A/4kW drive for smaller motors

S-D4010: 10A/7.5kW next-step model

20-COMM-E: EtherNet/IP communication module

PowerFlex 755T: Modern regenerative drive successor

1326AB-B725E-21: Reliance RPM AC motor pair

HIM-G6: Graphic interface module for parameter management

S-D4007-HC: Hazardous location version with Class I Div 2 rating

Installation and Maintenance

Pre-installation preparation: Verify motor insulation resistance (>100MΩ) and install line reactors when input power THDi exceeds 5%. Maintain minimum clearance (150mm top/sides) for convection cooling. Use copper conductors (min 4mm²) with ferrule-terminated connections.
Maintenance recommendations: Quarterly clean heatsink fins with compressed air (<30psi annually="" check="" dc="" bus="" capacitor="" health="" via="" capacitance="" meter="">90% of nominal). Monitor IGBT junction temperature; sustained >85°C requires derating. Replace cooling fans at 60,000 operational hours.<!--30psi).-->