Variable Speed Drive Solution – Control Techniques UNI4405 | Unidrive SP Series
Where This Product Is Used
The Emerson Control Techniques UNI4405 Unidrive SP1 is a high-performance AC variable speed drive engineered for demanding industrial automation environments. Engineers and system integrators specify this drive across a wide range of applications:
- Pump & Water Treatment Systems – Precise flow control in municipal water supply, wastewater treatment, and pressure-boosting stations.
- HVAC & Building Automation – Energy-efficient fan and air handling unit (AHU) speed regulation in commercial and industrial buildings.
- Conveyor & Material Handling – Smooth start/stop and variable speed control for belt conveyors, roller tables, and sorting lines.
- Compressor Drives – Controlled ramp-up for screw and reciprocating compressors to reduce mechanical stress and energy consumption.
- Textile & Printing Machinery – Tension control and synchronised multi-axis speed matching in web-handling processes.
- Food & Beverage Processing – Hygienic-area compatible drive control for mixers, fillers, and packaging lines.
- Marine & Offshore Auxiliary Drives – Robust operation in high-vibration, wide-temperature environments.
Technical Specifications
| Part Number / SKU | UNI4405 |
| Brand | Control Techniques (Emerson) |
| Series | Unidrive SP1 |
| Drive Type | AC Variable Speed Drive (VFD / Inverter) |
| Control Modes | Open-loop V/Hz, Closed-loop Vector, Sensorless Vector, Servo (with encoder) |
| Input Voltage | 380–480 V AC, 3-Phase (±10%) |
| Output Frequency | 0–3,000 Hz |
| Protection Rating | IP20 (panel-mount standard) |
| Communication Protocols | RS-485 (Modbus RTU), optional PROFIBUS, DeviceNet, EtherNet/IP via SM modules |
| Ambient Temperature | -10°C to +50°C (derate above 40°C) |
| Weight | 460 g (drive module) |
| Certifications | CE, UL, cUL, RoHS |
Why Engineers Specify This Model
- Universal Motor Control – Single platform supports induction, permanent magnet, and servo motors, reducing spare-parts inventory.
- High Dynamic Response – Fast torque response (<1 ms) enables precise positioning and tension control without an external PLC loop.
- Modular Expansion – SM (Solutions Module) slots allow plug-in fieldbus, encoder, I/O, and safety modules without rewiring.
- Energy Optimisation – Built-in energy-saving algorithm reduces motor losses at partial load — measurable kWh savings in pump and fan applications.
- Safe Torque Off (STO) – Integrated SIL 2 / PLd safety function eliminates the need for external safety contactors in many machine designs.
- Compact Footprint – Slim profile enables high-density panel layouts, reducing enclosure size and installation cost.
Complete System Bill of Materials
For a fully operational Unidrive SP1 installation, engineers typically specify the following complementary components:
- SM-Keypad Plus (remote operator panel)
- SM-EtherNet/IP or SM-PROFIBUS (fieldbus communication module)
- SM-Encoder Plus (closed-loop feedback module)
- Line reactor / EMC filter (input harmonic mitigation)
- Dynamic braking resistor (for high-inertia loads)
- Shielded motor cable (per IEC 61800-3 EMC requirements)
- 24 V DC auxiliary power supply (control circuit backup)
Compliance & Industry Standards
- CE Marking – Compliant with EU Low Voltage Directive (2014/35/EU) and EMC Directive (2014/30/EU).
- UL 508C – Listed for industrial control equipment (North American market).
- IEC 61800-5-1 – Adjustable speed electrical power drive systems safety standard.
- IEC 61800-3 – EMC requirements for variable speed drive systems.
- ISO 13849 / IEC 62061 – STO function rated SIL 2 / PLd for functional safety compliance.
- RoHS Directive – Restriction of hazardous substances compliant.
Quality Assurance & Sourcing
At Konmask.com, every Control Techniques UNI4405 unit is:
- Sourced from authorised distributors or verified surplus channels with full traceability documentation.
- Inspected for physical integrity, label authenticity, and firmware version prior to dispatch.
- Shipped in anti-static, moisture-barrier packaging with shock-absorbing foam inserts.
- Accompanied by a test report and 90-day functional warranty as standard.
How to Source This Part
- Click Add to Cart or Buy Now to place your order directly online.
- For volume orders (>5 units), OEM pricing, or project-specific lead times, contact our technical sales team.
- Urgent requirements? Email support@konmask.com or call +0086 19859288691 for same-day quotation.
- We ship globally via DHL Express, FedEx, and UPS with full export documentation (commercial invoice, packing list, COO).
Application-Specific FAQ
Q: Can the UNI4405 control a permanent magnet (PM) motor?
A: Yes. The Unidrive SP1 natively supports PM servo motors in closed-loop mode using the SM-Encoder Plus module.
Q: What fieldbus does the UNI4405 support natively?
A: The base unit includes RS-485 Modbus RTU. PROFIBUS DP, DeviceNet, CANopen, and EtherNet/IP are available via plug-in SM modules.
Q: Is the STO function certified for use in safety-rated machinery?
A: Yes. The integrated Safe Torque Off meets SIL 2 (IEC 62061) and PLd (ISO 13849), suitable for Category 3 stop functions.
Q: What is the maximum output frequency?
A: The UNI4405 can output up to 3,000 Hz, making it suitable for high-speed spindle and precision motion applications.
Q: Can I use this drive in a multi-drive common DC bus configuration?
A: Yes. The Unidrive SP1 supports common DC bus operation for energy regeneration between drives in multi-axis systems.
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