Emerson UNI3401 Inverter Drive Board – AC Drive Control PCB | Control Techniques Unidrive Series
Engineering Background
The Emerson UNI3401 is a factory-original inverter drive board engineered for the Control Techniques Unidrive platform — one of the most widely deployed AC variable-speed drive families in industrial automation. Designed to handle the demanding signal processing and power switching requirements of the Unidrive chassis, this PCB serves as the core control intelligence for motor speed regulation, torque management, and drive protection logic.
Product Positioning
Konmask.com supplies the UNI3401 as a genuine OEM replacement board for maintenance engineers and procurement teams managing Unidrive installations across manufacturing, HVAC, material handling, and process control environments. Each unit is sourced through verified industrial channels and undergoes functional inspection prior to dispatch.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | UNI3401 |
| Manufacturer | Control Techniques (Emerson Industrial Automation) |
| Product Series | Unidrive Classic / Unidrive SP Compatible |
| Component Type | Inverter Drive Control Board (PCB Assembly) |
| Function | AC Drive Control, Gate Drive Signal, Protection Logic |
| Form Factor | Plug-in PCB Module |
| Weight | Approx. 460 g |
| Origin | United Kingdom |
| Condition | New / Refurbished (specify at order) |
| Warranty | 12 Months (Konmask Standard) |
Proven Application Environments
- Manufacturing & Assembly Lines — Conveyor drives, servo-adjacent positioning systems
- HVAC & Building Automation — Fan and pump speed control in commercial buildings
- Material Handling — Hoist, crane, and elevator drive systems
- Process Industries — Compressor and mixer drives in chemical and food processing
- Water & Wastewater — Pump station variable-speed control
- OEM Machine Builders — Retrofit and spare-parts programs for Unidrive-based machines
Engineering Advantages
- OEM Authenticity — Genuine Control Techniques part number, not a third-party clone
- Drop-in Compatibility — Direct replacement for existing Unidrive chassis without firmware modification
- Functional Verification — Each board inspected for gate drive integrity and signal continuity
- Reduced Downtime — Ready-to-ship stock minimizes production line interruption
- Traceable Sourcing — Full supply chain documentation available on request
- Global Logistics — EMS/DHL/FedEx export from China with customs documentation support
System Architecture & Signal Flow
The UNI3401 board interfaces directly with the Unidrive power stack, receiving speed reference and torque demand signals from the drive’s control terminals or fieldbus interface. It generates PWM gate drive signals for the IGBT bridge, monitors DC bus voltage, output current, and thermal sensors, and executes the drive’s protection trip logic (overcurrent, overvoltage, undertemperature). The board communicates with optional option modules via the Unidrive’s internal expansion bus.
For detailed signal pinout and connector mapping, refer to the Control Techniques Unidrive Technical Reference Manual or contact Konmask engineering support.
Sourcing & Quality Verification
- All UNI3401 units are sourced from authorized industrial distributors or decommissioned OEM equipment with full traceability
- Visual inspection: solder joint integrity, component presence, PCB trace condition
- Functional bench test where applicable (power-on, gate signal verification)
- Anti-static packaging (ESD bag + foam insert) for safe international transit
- Certificate of conformity and test report available upon request
Procurement Process
- Confirm Part Number — Verify UNI3401 against your drive’s nameplate or existing board label
- Request Quote — Contact support@konmask.com with quantity and required condition (new/refurbished)
- Receive Pro Forma Invoice — Includes unit price, shipping, and lead time
- Payment & Export — T/T, PayPal, or platform checkout; export documentation provided
- Delivery & Installation — Typical transit 5–10 business days; installation guide available on request
Technical FAQ
Q: Is the UNI3401 compatible with both Unidrive Classic and Unidrive SP?
A: The UNI3401 is primarily associated with the Unidrive Classic platform. Please confirm your drive’s full model number before ordering to ensure compatibility.
Q: Can Konmask provide a test report for this board?
A: Yes. Functional test reports are available for refurbished units. New OEM units ship with manufacturer documentation.
Q: What is the lead time for UNI3401?
A: In-stock units ship within 1–2 business days. Out-of-stock lead time is typically 7–14 business days depending on sourcing.
Q: Do you support bulk/project orders?
A: Yes. Volume pricing and project-based procurement agreements are available. Contact support@konmask.com for details.
Q: What warranty is provided?
A: Konmask provides a 12-month warranty covering manufacturing defects and functional failure under normal operating conditions.
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