Description

Product Overview

Unidrive SP4403 is a universal high‑performance AC drive manufactured by Control Techniques (Nidec), belonging to the Unidrive SP solution‑platform series. Rated 45 kW (60 HP) / 96 A continuous output at 380‑480 V three‑phase supply, this multi‑mode drive supports induction motor, synchronous motor and servo motor control within one hardware unit. It is widely deployed for high‑dynamic motion, process speed regulation and retrofitting projects across heavy‑duty industrial sites.

Many production‑line modernisation projects face mixed‑motor‑type demands and limited cabinet space, requiring separate inverters and servo amplifiers. Unidrive SP4403 solves this challenge by offering multiple control algorithms selectable via parameter setup. The built‑in dynamic braking transistor, onboard EMC filter and expandable option‑slot architecture reduce extra peripheral hardware requirement. The embedded programmable logic function replaces conventional relay logic for simple sequencing tasks. It accepts multiple encoder feedback types and supports mainstream industrial fieldbus via plug‑in modules, helping engineers unify drive hardware for diverse machine axes while simplifying spare‑parts inventory management.

Technical Specifications

Parameter name	Parameter value
Product model	Unidrive SP4403
Manufacturer	Control Techniques (Nidec / former Emerson)
Product type	Universal AC variable‑frequency drive
Nominal input	3‑Phase 380‑480 V AC
Continuous output current	96 A
Nominal power rating	45 kW (60 HP)
Overload capacity	150 % for 60 s
Max output frequency	0‑550 Hz
Control modes	RFC open‑loop vector, closed‑loop vector, servo, V/F
Braking	On‑board dynamic braking transistor, DC injection braking
Built‑in functions	Embedded PLC logic, onboard EMC filter
Feedback support	Incremental, SinCos, SSI, EnDat, HIPERFACE encoders
Operating temperature	0 °C … +40 °C (derating above 40°C)
Mounting	Panel‑mount
Protection class	IP20
Weight	14.5 kg
Certifications	CE, UL508

Key Features and Advantages

multi‑motor universal control: Unidrive SP4403 runs induction, permanent‑magnet synchronous and servo motors without hardware modification. Users switch control modes via parameter settings, supporting zero‑speed full‑torque closed‑loop vector and high‑dynamic servo positioning applications. embedded programmable logic: On‑board logic controller configured by SyPTLite ladder software takes charge of local interlock and sequence control, reducing external PLC I/O burden for single‑machine standalone applications. expandable option‑slot architecture: Two expansion slots accept communication and I/O option modules, including Profibus‑DP, DeviceNet, Ethernet, extended I/O and universal encoder interfaces, adapting to different plant communication architectures. integrated peripheral hardware: Dynamic braking transistor and EMC filter are built‑in, removing requirement for many external components. This lowers cabinet component count and shortens commissioning cycle for new builds and retrofits. comprehensive drive‑level diagnostics: Rich fault logging, motor auto‑tune function and real‑time monitoring assist troubleshooting. CTSoft PC tool supports parameter backup‑restore and drive commissioning for batch machine configuration.

Unidrive SP4403

Application Fields

Unidrive SP4403 serves heavy‑duty variable‑speed and motion‑control applications across machinery, material‑handling, metallurgy and process industries. In printing and packaging lines, it controls main drive rollers and tension‑control axes, delivering high‑precision speed‑and‑torque regulation for web‑processing equipment.

Within material‑handling systems, the drive runs large conveyors, hoists and lifting mechanisms. Closed‑loop vector mode guarantees stable torque output at low speed, meeting safety requirements for lifting loads. For extruders, mixers and process pumps in chemical and plastic plants, RFC open‑loop vector control provides stable speed regulation without encoder hardware.

It is also heavily used for legacy equipment retrofit projects. Unidrive SP4403 can replace older‑generation drives while re‑using existing motor and field wiring. Through fieldbus option modules, it connects to different‑brand upper‑level control systems, extending service life of production assets without full mechanical redesign.

Installation and Maintenance

pre‑installation preparation: Before powering up Unidrive SP4403, confirm three‑phase mains voltage matches rated 380‑480 V range. Respect minimum cabinet clearance for top‑and‑bottom ventilation to avoid over‑heating. Separate motor power cables from control signal wiring; apply proper shielding and earthing. Complete motor auto‑tune after wiring, verify encoder wiring for closed‑loop / servo configurations before applying load. Install matched braking resistor if frequent high‑duty‑cycle deceleration occurs.

maintenance recommendations: During routine inspections, check cooling fan operation and heat‑sink dust accumulation; clean dust periodically to prevent over‑temperature trips. Verify terminal screw tightness under thermal‑cycling cabinet environment. Back‑up drive parameters via CTSoft before component replacement. Do not perform live‑front‑panel maintenance with power applied. Unidrive SP4403 contains no user‑serviceable internal power components; send faulty units to authorised service centres.

Product Warranty & Support

Each Unidrive SP4403 completes factory full‑load testing, motor‑control validation and peripheral‑interface checking prior to shipment. Standard warranty covers manufacturing defects for 12 months from delivery date. Spare‑part sourcing, parameter debugging guidance and remote technical support are available for commissioning, on‑site SAT and fault diagnosis. Application engineers assist with motor auto‑tune, fieldbus configuration and regenerative‑braking system setup. Long‑term spare‑parts supply mitigates obsolescence risk for installed Unidrive SP drive‑based automation assets.

Product Overview Unidrive SP4403 Universal AC variable‑frequency drive

Description