Product Overview
The Emerson SP4403 is a high-performance universal AC variable speed drive belonging to the Unidrive SP series, a platform renowned for its flexibility and reliability in demanding industrial motion and motor control applications. The Emerson SP4403 stands out as a truly universal drive, capable of controlling induction motors, servo motors, and permanent magnet synchronous motors within a single hardware unit, selectable via parameter configuration . This multi-motor compatibility eliminates the need for separate inverter and servo amplifier inventories, significantly simplifying system design and spare parts management.
The Emerson SP4403 operates from a 3-phase 380-480 VAC supply and delivers a continuous output current of 96 A, corresponding to a nominal power rating of 45 kW (60 HP) . Some sources reference a heavy-duty rating of 104 A (75 HP), reflecting the drive’s capability to handle demanding loads with appropriate derating considerations . The drive supports multiple control modes including open-loop vector (RFC), closed-loop vector, servo, and V/Hz, making it adaptable to a broad spectrum of application requirements from simple fan and pump control to high-dynamic positioning tasks.
As part of the Unidrive SP solution-platform series, the Emerson SP4403 incorporates expandable option slots that accept communication and I/O modules, enabling integration with mainstream industrial fieldbus networks including Profibus-DP, DeviceNet, CANopen, and Ethernet . The drive’s onboard dynamic braking transistor, integrated EMC filter, and embedded programmable logic capabilities reduce external component requirements and simplify cabinet design for both new installations and legacy retrofit projects.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | SP4403 |
| Manufacturer | Emerson / Control Techniques (Nidec) |
| Product Type | Universal AC Variable Speed Drive |
| Product Series | Unidrive SP |
| Nominal Input Voltage | 3-Phase 380-480 VAC |
| Continuous Output Current | 96 A |
| Nominal Power Rating | 45 kW (60 HP) |
| Heavy Duty Rating | 104 A (75 HP) reference |
| Overload Capacity | 150% for 60 seconds |
| Output Frequency Range | 0-550 Hz |
| Control Modes | RFC Open-Loop Vector, Closed-Loop Vector, Servo, V/Hz |
| Motor Compatibility | Induction, Servo, Permanent Magnet Synchronous |
| Feedback Support | Incremental, SinCos, SSI, EnDat, HIPERFACE |
| Communication (Standard) | Modbus RTU |
| Communication (Optional) | Profibus-DP, DeviceNet, CANopen, Ethernet, Interbus |
| Protection Class | IP20 |
| Operating Temperature | 0°C to +40°C (derating above 40°C) |
| Dimensions (W x H x D) | Approximately 220 x 230 x 160 mm |
| Weight | Approximately 14.5 kg |
| Certifications | CE, UL508 |
