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- Emerson
- SP1403
- AC Drive
- USA
- 368 × 100 × 219 mm
- 1.4 kg
- Xiamen, China
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Product Overview
The Emerson SP1403 Unidrive SP Series AC Drive is a universal variable-speed drive for induction and supported servo motor applications. It is used in industrial machinery where motor speed, acceleration, deceleration and control response must be adjusted to match the process. Its configurable control functions make it suitable for systems ranging from general-purpose motor speed regulation to applications requiring more advanced motor control.
The SP1403 is a three-phase 380–480 V AC drive with a Heavy Duty continuous output current rating of 4.2 A and a Normal Duty rating of 5.0 A. These ratings distinguish the drive’s capabilities under different load conditions. The selected duty must be appropriate for the motor’s rated current, starting requirements and operating profile.
In a machine-control system, the SP1403 can receive run commands and speed references from a PLC or local control interface. Programmable parameters define motor behavior and operating limits, while compatible option modules can add communication or feedback capabilities when the application requires them. Drive status and diagnostic information also help maintenance personnel identify issues affecting motor operation.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Emerson / Control Techniques |
| Model | SP1403 |
| Product Series | Unidrive SP |
| Product Type | Universal Variable Speed AC Drive |
| Motor Compatibility | Induction and supported servo motors |
| Input Voltage | 380–480 V AC, three-phase |
| Input Frequency | 48–65 Hz |
| Heavy Duty Continuous Output Current | 4.2 A |
| Normal Duty Continuous Output Current | 5.0 A |
| Typical Heavy Duty Motor Power | 1.5 kW |
| Typical Normal Duty Motor Power | 2.2 kW |
| Drive Protection Rating | IP20 |
| Control Functions | Configurable motor-control modes and programmable parameters |
| Digital Inputs | 7 |
| Analog Inputs | 3 |
| Digital Outputs | 3 |
| Analog Outputs | 2 |
| Relay Outputs | 1 |
| Optional Expansion | Compatible Unidrive SP communication and feedback modules |
| Dimensions | 368 × 100 × 219 mm |
| Weight | 1.4 kg |
Product Features
- High-performance motor control: Supports induction and compatible servo motor applications with configurable control modes.
- Two continuous-current ratings: Provides 4.2 A Heavy Duty and 5.0 A Normal Duty ratings for matching the drive to the application.
- Three-phase supply: Operates from a 380–480 V AC input supply.
- Programmable speed control: Allows the motor response to be adjusted through the configured speed reference and drive parameters.
- Ramp adjustment: Supports acceleration and deceleration settings to suit the driven equipment and process cycle.
- Integrated I/O: Includes digital, analog and relay interfaces for compatible command signals, monitoring and control functions.
- Optional communication and feedback: Supports compatible expansion modules for applications requiring additional interfaces.
- Drive diagnostics: Supplies status and fault information for commissioning and maintenance.
- Machine-control integration: Can operate within PLC-based systems using supported command and feedback arrangements.
- Application flexibility: Allows control parameters to be configured for the connected motor and load.
Working Principle
The SP1403 converts its three-phase AC input into a controlled output for the connected motor. Its power electronics regulate the output according to the selected control mode, programmed motor data and incoming speed or operating commands. The drive adjusts motor operation to follow the requested reference within its configured limits.
The SP1403 has a Heavy Duty continuous output current rating of 4.2 A and a Normal Duty rating of 5.0 A. Heavy Duty operation is generally relevant to applications with greater overload demands, while Normal Duty is used when the load profile permits the higher current rating under its specified operating conditions. The selected mode must be checked against the motor and application requirements.
The drive’s control inputs and programmable parameters determine how it responds to run commands, reference changes and stop requests. Acceleration and deceleration settings influence how quickly the motor changes speed, so they should be configured according to the inertia and operating characteristics of the driven machine.
If the drive detects a fault or an operating condition outside its configured limits, it can indicate a fault state and respond according to its settings. Effective troubleshooting requires checking the recorded fault, supply conditions, motor connections, control signals and relevant parameters rather than changing settings without diagnosis.
Role in an Industrial Motor Control Architecture
The SP1403 acts as the motor-control layer between the three-phase supply, automation controller and connected motor. It executes the configured control strategy while allowing the wider machine system to coordinate operation, monitor status and respond to drive faults.
| System Component | Function | Relationship to the Drive |
|---|---|---|
| Three-Phase AC Supply | Provides input power | Feeds the drive through suitable isolation and protection equipment |
| AC Motor | Converts electrical power into mechanical motion | Receives the drive’s controlled output |
| PLC or Machine Controller | Coordinates the operating sequence | Sends compatible run commands and speed references |
| Operator Control Station | Provides local start, stop and adjustment commands | Interfaces through supported control connections |
| Speed Reference Source | Defines requested motor speed | Supplies a configured analog or digital reference |
| Motor Feedback Device | Supplies speed or position information where required | Connects through a compatible feedback interface or option module |
| Protective Devices | Provide upstream circuit protection | Are selected according to the installation design |
| Machine Interlocks | Prevent operation under prohibited conditions | Coordinate enable, stopping and restart logic |
| Supervisory Monitoring System | Displays drive and machine status | Uses supported communications or controller-mapped signals |
Industrial Applications
| Application | Operating Requirement | Role of the SP1403 |
|---|---|---|
| Conveyor Systems | Adjust motor speed to match material flow | Regulates motor operation through the configured speed reference |
| Pumping Equipment | Match motor operation to process demand | Supports variable-speed control when the motor and pump are correctly selected |
| Fans and Blowers | Adjust airflow through motor-speed control | Changes motor speed in response to control commands |
| Packaging Machinery | Coordinate motor response with machine timing | Applies configured speed and ramp parameters |
| Material Handling Systems | Control motor response under changing loads | Provides adjustable-speed operation within the drive’s ratings |
| General Industrial Machinery | Integrate motor control with automated sequences | Executes drive commands and supplies status and fault information |
Installation and Maintenance
- Verify the model designation: Confirm that the unit is an SP1403 and that its supply and output ratings suit the intended application.
- Check the electrical supply: Verify the available three-phase supply against the drive’s 380–480 V AC rating and the applicable installation documentation.
- Inspect the unit and terminals: Check for visible damage, contamination, loose connections and signs of overheating before installation.
- Provide adequate ventilation: Follow the required installation clearances and cooling instructions to manage operating temperature.
- Verify protective grounding: Ensure that the protective-earth connection follows the installation design and applicable electrical regulations.
- Match the drive to the motor: Compare motor rated current and overload requirements with the 4.2 A Heavy Duty and 5.0 A Normal Duty ratings.
- Inspect motor output wiring: Confirm conductor sizing, terminal connections, cable insulation and routing before energizing the drive.
- Review control I/O wiring: Verify run commands, stop signals, reference inputs, digital outputs and interlocks against the machine drawings.
- Enter motor data: Configure the required motor nameplate parameters and confirm the selected control mode is appropriate for the application.
- Set speed and ramp parameters: Configure operating limits, acceleration and deceleration to suit the machine’s load and process requirements.
- Perform a controlled functional test: Verify motor direction, speed response, stopping behavior, I/O operation and fault indication before production use.
- Document the final settings: Record motor data, duty selection, control parameters, installed option modules, fault history and commissioning results.
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 supported command signals and interface arrangements |
| Operator Control Station | Provides local operating commands | Verify the control wiring and stop-circuit design |
| Speed Reference Device | Supplies the requested motor speed | Match signal type and scaling to the configured input |
| Motor Feedback Device | Supplies speed or position feedback | Requires a compatible feedback interface and supported configuration |
| Communication Option Module | Adds a supported network interface | Confirm the exact module, protocol and drive compatibility |
| Upstream Protective Device | Protects the input supply circuit | Select according to the electrical installation requirements |
| Motor Isolation Device | Allows safe isolation during service | Coordinate with the machine’s isolation and safety procedures |
| Panel Ventilation Equipment | Manages heat within the enclosure | Select according to the panel’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 series | Compare the 2.1 A Heavy Duty and 2.8 A Normal Duty ratings with the motor requirement |
| Emerson SP1402 | Unidrive SP AC Drive | Lower-current model in the same product group | Compare its 3.0 A Heavy Duty and 3.8 A Normal Duty ratings with the load |
| Emerson SP1404 | Unidrive SP AC Drive | Higher-current model in the SP1400 group | Evaluate if the required current exceeds the SP1403’s suitable rating |
| Emerson SP1405 | Unidrive SP AC Drive | Higher-rated model in the same series | Check output current, duty requirements and supply configuration before selection |
Key Advantages
- Provides 4.2 A Heavy Duty and 5.0 A Normal Duty continuous output-current ratings.
- Supports induction and compatible servo motor control.
- Operates from a three-phase 380–480 V AC supply.
- Includes digital, analog and relay I/O for control and monitoring.
- Supports compatible communication and feedback expansion.
- Provides status and fault information to assist commissioning and maintenance.
Technical FAQs
How do the SP1403 current ratings affect motor selection?
The drive is rated at 4.2 A for Heavy Duty operation and 5.0 A for Normal Duty operation. The motor’s rated current must be compatible with the selected duty, and the application must also meet the drive’s overload and operating requirements.
What should be checked if the motor speed fluctuates around the commanded reference?
Check the reference signal stability, configured control mode, motor data, feedback settings where applicable, and any active current or torque limits. Also inspect the mechanical load for changing resistance or irregular operation.
How can the SP1403’s integrated I/O be used in a PLC-controlled machine?
The drive’s digital and analog inputs can receive supported control signals, while its digital, analog and relay outputs can provide configured status or measurement signals. Confirm the signal type, scaling and I/O assignments in the control design before commissioning.
What should be recorded before replacing an SP1403?
Record the motor nameplate data, selected duty, control mode, speed limits, ramp settings, I/O assignments and installed option modules. This information helps reproduce the previous configuration and verify operation after replacement.