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- SP1402
- AC Drive
- USA
- 368 × 100 × 219 mm
- 1.4 kg
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Product Overview
The Emerson SP1402 Unidrive SP Series AC Drive is a variable-speed drive for industrial AC motor applications that require adjustable speed, controlled acceleration and configurable motor response. It belongs to the Unidrive SP platform, which supports multiple motor-control modes and can be configured to suit different machine operating requirements.
The SP1402 has a Heavy Duty continuous output current rating of 3.0 A and a Normal Duty rating of 3.8 A. These ratings distinguish applications with higher overload demands from those operating under less demanding load conditions. Selection should be based on the motor’s rated current, the required overload performance and the actual load profile, rather than motor power alone.
In an automated machine, the drive receives run commands and speed references from local controls or a machine controller. Its configured parameters determine how the motor responds to changes in demand, including acceleration, deceleration and operating limits. Drive status and fault information can also be incorporated into maintenance procedures to help diagnose problems involving the motor, supply, control signals or driven equipment.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Emerson / Control Techniques |
| Model | SP1402 |
| Product Series | Unidrive SP |
| Product Type | AC Drive |
| Frame Size | Size 1 |
| Supply Voltage Class | 380–480 V AC |
| Supply Frequency | 48–65 Hz |
| Heavy Duty Continuous Output Current | 3.0 A |
| Normal Duty Continuous Output Current | 3.8 A |
| Typical Motor Power at 400 V, Heavy Duty | 1.1 kW |
| Typical Motor Power at 400 V, Normal Duty | 1.5 kW |
| Output Frequency | Configurable according to the operating mode and application settings |
| Motor Control | Configurable control modes supported by the Unidrive SP platform |
| Parameter Configuration | Programmable drive and motor parameters |
| Optional Expansion | Compatible Unidrive SP interface and feedback modules, subject to configuration |
| Dimensions | 368 × 100 × 219 mm |
| Weight | 1.4 kg |
Product Features
- Two duty ratings: Offers separate Heavy Duty and Normal Duty output-current ratings, allowing selection based on load characteristics and overload requirements.
- Adjustable motor speed: Regulates motor operation according to the configured speed reference and selected control mode.
- Programmable ramp control: Allows acceleration and deceleration settings to be adjusted to the driven machine.
- Configurable motor parameters: Supports entry of motor data and application-specific operating settings.
- Flexible command handling: Can receive compatible run, stop and speed commands from local controls or an external controller.
- Optional interface expansion: Supports compatible option modules where additional communication or feedback functions are required.
- Drive status monitoring: Supplies operating-state and fault information for machine supervision and troubleshooting.
- Application-specific configuration: Allows control behavior to be adapted to the needs of the connected motor and mechanical load.
- Industrial control integration: Fits into control panels where drive operation is coordinated with PLC logic, interlocks and machine sequences.
Working Principle
The SP1402 converts its AC input power into a controlled electrical output for the connected motor. The drive’s power electronics regulate the output according to the selected control mode, motor parameters and incoming operating commands. Changes to the speed reference affect motor operation within the configured limits.
The drive’s current rating depends on the selected duty. In Heavy Duty operation, the maximum continuous output-current rating is 3.0 A; in Normal Duty operation, it is 3.8 A. The application must be evaluated against the appropriate rating, including starting demand, overload requirements and the load’s behavior during normal operation.
Acceleration and deceleration parameters govern how the motor responds when the command changes. Ramp settings that are too aggressive can place unnecessary stress on connected machinery, while overly slow ramps may prevent the process from meeting its required cycle time. Appropriate settings depend on the driven load and the machine’s operating sequence.
The drive also monitors its internal operating conditions and can report faults that interrupt normal operation. Troubleshooting should consider the displayed fault information, motor wiring, input supply, parameter settings and external command signals before changing the configuration.
Role in an Industrial Motor Control Architecture
The SP1402 acts as the variable-speed control layer between the electrical supply, machine controller and motor. It executes the configured motor-control strategy while allowing the wider automation system to coordinate starts, stops, speed changes and fault responses.
| System Component | Function | Relationship to the Drive |
|---|---|---|
| AC Supply | Provides electrical input power | Feeds the drive through appropriately rated isolation and protection equipment |
| AC Motor | Converts electrical power into mechanical motion | Receives the controlled output from the drive |
| PLC or Machine Controller | Coordinates machine sequences | Sends compatible operating commands and speed references |
| Operator Control Station | Provides local operating commands | Interfaces through supported drive control connections |
| Speed Reference Source | Defines the requested motor speed | Supplies the configured reference signal or digital command |
| Motor Feedback Device | Provides speed or position feedback where required | Requires a compatible feedback interface and supported configuration |
| Protective Devices | Protect the supply circuit | Are selected according to the electrical design and installation requirements |
| Machine Interlocks | Prevent operation under prohibited conditions | Coordinate drive enable, stopping and restart logic |
| Supervisory Monitoring System | Displays machine and drive status | Uses supported communications or controller-mapped signals |
Industrial Applications
| Application | Operating Requirement | Role of the SP1402 |
|---|---|---|
| Conveyor Systems | Adjust conveying speed to match material flow | Regulates motor speed through the configured reference |
| Pumping Equipment | Match motor operation to process demand | Supports variable-speed operation when the motor and pump are appropriately selected |
| Fans and Blowers | Adjust airflow through speed control | Changes motor speed according to the control command |
| Packaging Machinery | Coordinate motor response with machine timing | Applies configured ramp settings and speed references |
| Material Handling Equipment | Control motion under changing load conditions | Provides adjustable-speed motor control within its ratings |
| General Industrial Machinery | Coordinate motor operation with automation logic | Executes drive commands and supplies status and fault information |
Installation and Maintenance
- Verify the model designation: Confirm that the installed unit is an SP1402 and that its rating matches the intended motor-control application.
- Check the electrical supply: Verify the supply voltage and frequency against the drive nameplate and applicable installation documentation before connecting power.
- Inspect the drive and terminals: Look for physical damage, contamination, loose connections or signs of overheating before installation.
- Provide suitable ventilation: Follow the required panel clearances and cooling instructions to prevent excessive operating temperature.
- Verify protective grounding: Ensure that protective earth connections comply with the installation design and applicable electrical regulations.
- Match the motor rating: Compare the motor’s nameplate current with the SP1402’s 3.0 A Heavy Duty and 3.8 A Normal Duty ratings, selecting the appropriate duty for the application.
- Inspect motor output wiring: Check conductor sizing, terminal connections, insulation and cable routing before energizing the drive.
- Review control connections: Confirm the wiring of run commands, stop signals, speed references and machine interlocks against the control drawings.
- Enter motor data: Configure the required motor parameters and verify that the selected control mode is appropriate for the application.
- Set acceleration and deceleration: Adjust ramp parameters to suit the mechanical load, process cycle and stopping requirements.
- Perform a controlled functional test: Check motor direction, speed response, stopping behavior and fault indication before returning the machine to production.
- Document service changes: Record the drive configuration, motor data, fault history, wiring checks and any parameter changes made during maintenance.
Compatible System Components
| Component | Function | Compatibility Consideration |
|---|---|---|
| Compatible AC Motor | Produces mechanical output | Verify rated current, voltage and control requirements against the drive |
| PLC or Machine Controller | Executes machine logic | Confirm the supported command interface and signal arrangement |
| Operator Control Station | Provides local start, stop and operating commands | Check the control wiring and stop-circuit design |
| Speed Reference Device | Supplies the desired speed command | Match the signal type and scaling to the configured drive input |
| Motor Feedback Device | Supplies speed or position information | Requires a compatible feedback option and supported device |
| Communication Option Module | Adds a supported network interface | Verify the exact module, protocol and drive configuration |
| Upstream Protective Device | Protects the input supply circuit | Select according to the electrical design and applicable requirements |
| Motor Isolation Device | Allows safe isolation during service | Coordinate with the machine’s isolation and safety procedures |
| Panel Ventilation Equipment | Removes heat from the enclosure | Size according to the enclosure’s thermal load and installation conditions |
Recommended Related Models
| Model | Product Type | Relationship | Selection Consideration |
|---|---|---|---|
| Emerson SP1401 | Unidrive SP AC Drive | Lower-rated model in the same product group | Compare its 2.1 A Heavy Duty and 2.8 A Normal Duty ratings with the application |
| Emerson SP1403 | Unidrive SP AC Drive | Higher-rated model in the same product group | Evaluate when the required motor current exceeds the SP1402’s suitable rating |
| Emerson SP1404 | Unidrive SP AC Drive | Higher-current model in the SP1400 range | Verify the required duty rating and supply configuration before selecting |
| Emerson SP1405 | Unidrive SP AC Drive | Higher-rated model in the same series | Compare its electrical ratings and application requirements before considering substitution |
Key Advantages
- Offers 3.0 A Heavy Duty and 3.8 A Normal Duty continuous output-current ratings.
- Supports adjustable-speed operation for compatible AC motor applications.
- Provides programmable acceleration, deceleration and operating parameters.
- Integrates with compatible machine controllers and external command sources.
- Supports optional expansion for applications requiring additional feedback or communications.
- Supplies status and fault information to assist maintenance and troubleshooting.
Technical FAQs
How should the SP1402 duty rating be selected for a machine with variable loads?
Compare the motor’s rated current with the drive’s continuous output-current rating for the intended duty. Heavy Duty operation is rated at 3.0 A, while Normal Duty operation is rated at 3.8 A. The required overload performance and the machine’s actual load profile should guide selection.
What should be checked if the SP1402 trips when the machine accelerates?
Review the recorded fault, acceleration ramp, motor nameplate parameters, load condition and supply stability. Also verify that the motor’s current demand is suitable for the selected duty rating before changing protection or control settings.
Can an SP1402 be integrated with a PLC for automatic speed control?
Yes, where the PLC and drive use a compatible control interface. The run command, speed reference, enable conditions and fault response should be mapped and tested as part of the machine’s control sequence.
What information should be retained before replacing an SP1402?
Record the motor data, duty selection, control mode, speed limits, acceleration and deceleration settings, command assignments and any installed option modules. These details help reproduce the previous operating behavior and reduce commissioning time after replacement.