Control Techniques UNI1404 Unidrive Classic

Name: Control Techniques UNI1404 Unidrive Classic
Brand: Control Techniques
SKU: UNI1404
Availability: InStock

Price range: € 1.043,00 through € 1.299,00

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SKU: UNI1404 Category: Drive Brand: Control Techniques

Description
Additional information

The Control Techniques Unidrive Classic UNI1404 is a high-performance AC variable speed drive belonging to the Unidrive Classic series by Control Techniques. This unit is designed for demanding industrial motor control applications, offering both open-loop and closed-loop vector control as well as servo control capabilities within a single drive platform. The UNI1404 represents a mid-range power variant within the Unidrive Classic family, suitable for three-phase AC induction and permanent magnet motor applications.

The UNI1404 features advanced flux vector control technology enabling precise speed and torque regulation without the need for encoder feedback in open-loop mode, and high-accuracy performance when used with an encoder in closed-loop mode. The drive supports multiple communication options including RS-485 serial communications and is compatible with optional fieldbus modules for PROFIBUS-DP, DeviceNet, and CANopen integration. It incorporates a comprehensive suite of protective functions including overcurrent, overvoltage, undervoltage, overtemperature, and phase loss detection, along with a built-in EMC filter on selected variants and programmable digital and analog I/O for flexible system integration.

The Unidrive Classic UNI1404 is widely deployed in applications such as pumps, fans, compressors, conveyors, extruders, winding machines, and general-purpose industrial machinery. Its multi-mode operation makes it particularly suitable for OEM machine builders and system integrators requiring a single drive platform capable of handling both induction motor and servo motor control. Industries served include food and beverage processing, packaging, material handling, plastics, and textile manufacturing.

Technical Specifications

Power Rating	7.5 kW
Input Voltage	380 – 480 V AC, 3-phase
Output Current (Continuous)	19 A
Control Type	Open-loop vector, Closed-loop vector, Servo
Switching Frequency	3 – 12 kHz (adjustable)
Communication Interface	RS-485 serial; optional fieldbus modules (PROFIBUS-DP, DeviceNet, CANopen)
Feedback Interface	Incremental encoder (quadrature), resolver (with option module)
Operating Temperature	0 °C to +40 °C (derated to +50 °C)
Storage Temperature	-40 °C to +60 °C
Relative Humidity	5 – 95 % non-condensing
IP/Protection Rating	IP20
Mounting	Panel mount (through-hole or surface mount)
Series/Product Family	Unidrive Classic
Certifications	CE, UL, cUL

Common Fault Codes

OV: DC bus overvoltage. The DC link voltage has exceeded the maximum threshold, typically caused by regenerative energy during deceleration or high supply voltage.
Increase deceleration ramp time, install a braking resistor, or check supply voltage levels.
UV: DC bus undervoltage. The DC link voltage has fallen below the minimum operating threshold, indicating a supply interruption or low input voltage.
Check input supply voltage and connections. Verify that all three input phases are present and within specification.
OI.AC: Output overcurrent (AC side). Instantaneous overcurrent detected on the drive output, often caused by a short circuit, motor fault, or excessively short acceleration ramp.
Check motor wiring for short circuits or earth faults. Increase acceleration ramp time. Verify motor parameters are correctly programmed.
OI.DC: DC bus overcurrent. Excessive current detected in the DC link, which may indicate a faulty braking resistor or internal drive fault.
Check braking resistor connections and resistance value. If fault persists, the drive may require internal inspection or replacement.
OH: Drive overtemperature. The heatsink temperature has exceeded the allowable limit due to insufficient cooling or excessive ambient temperature.
Check that cooling fans are operational, ensure adequate ventilation around the drive, and verify ambient temperature is within specification.
OL: Motor overload. The drive has detected sustained output current exceeding the motor's rated current, indicating mechanical overload or incorrect motor parameters.
Check mechanical load on the motor, verify motor rated current parameter settings, and reduce load if necessary.
Ph: Input phase loss. One or more input supply phases are missing or have an unacceptable voltage imbalance.
Check all three input supply connections and fuses. Verify supply voltage balance across all phases.
EEF: EEPROM fault. A checksum error has been detected in the drive's non-volatile memory, indicating corrupted parameter data.
Perform a factory reset to restore default parameters, then re-enter all required parameter settings. If fault recurs, the drive control board may need replacement.

Frequently Asked Questions

What is the power rating and output current of the UNI1404?

The UNI1404 is rated at 7.5 kW with a continuous output current of 19 A for a 380–480 V AC three-phase supply.

What motor control modes does the Unidrive Classic UNI1404 support?

The UNI1404 supports open-loop vector control, closed-loop vector control, and servo control modes, making it compatible with both AC induction motors and permanent magnet servo motors.

What communication protocols are supported by the UNI1404?

The drive has a built-in RS-485 serial interface and supports optional fieldbus communication modules for PROFIBUS-DP, DeviceNet, and CANopen.

Is a braking resistor required for the UNI1404?

A braking resistor is not included as standard but is recommended for applications with high-inertia loads or frequent deceleration cycles to dissipate regenerative energy and prevent overvoltage faults.

What encoder types are compatible with the UNI1404 for closed-loop operation?

The UNI1404 supports incremental quadrature encoders as standard for closed-loop vector and servo control. Resolver feedback can be accommodated via an optional resolver interface module.

Troubleshooting

Drive displays OV fault immediately upon deceleration

Measure DC bus voltage during deceleration using the drive's diagnostic parameters. Check if a braking resistor is installed and verify its resistance and power rating.

Increase the deceleration ramp time in the drive parameters. If regenerative loads are significant, install an appropriately rated braking resistor and ensure the braking resistor cable connections are secure.

Drive trips on OI.AC fault at startup or during acceleration

Inspect motor cable for insulation faults or short circuits using a megohmmeter. Verify that motor nameplate data (voltage, current, frequency) matches the programmed parameters in the drive.

Correct any wiring faults found in the motor cable or motor terminal box. Increase the acceleration ramp time. Ensure motor parameters including rated voltage, current, and frequency are correctly entered.

Drive powers up but display is blank or shows no response

Check the 24 V DC control supply if an external supply is used. Inspect internal fuses and verify that the input supply voltage is within the rated range of 380–480 V AC.

Replace any blown input fuses with correctly rated replacements. If the control board supply is confirmed present but the display remains inactive, the control board or display assembly may require replacement.

Motor runs but speed is unstable or hunting in closed-loop mode

Check encoder wiring for loose connections, shielding continuity, and correct signal levels. Verify encoder pulses per revolution parameter matches the actual encoder specification.

Re-terminate encoder cable connections ensuring the shield is grounded at one end only. Correct the encoder PPR parameter. Adjust the speed loop proportional and integral gains to stabilize the response.

EEF fault appears after power cycling

This indicates corrupted EEPROM data, which can result from a power interruption during a parameter save operation or a failing non-volatile memory device on the control board.

Perform a factory parameter reset using the drive's reset procedure, then reprogram all application-specific parameters. If the EEF fault recurs consistently, the control board requires repair or replacement.

Condition	Repair, Used, Refurbished, New in box (sealed)