Product Analysis: Nidec Control Techniques SM-APS-LITE
The SM-APS-LITE is an essential auxiliary power supply module designed for the Unidrive SP and Digitax ST series by Nidec Control Techniques. The primary function of this «Solutions Module» is to provide a secondary 24V DC input to the drive’s control circuitry. This ensures that the control logic, communication modules, and encoder feedback remain active even if the main AC power supply is disconnected. This is a critical requirement for networked automation systems that must maintain communication with the PLC during power-down cycles.
High-Availability Automation and Safety
The SM-APS-LITE is the «lite» version of the auxiliary power modules, optimized for cost-effective 24V backup. By keeping the drive’s internal processor «alive,» the module prevents the loss of fieldbus communication and eliminates the need for long homing routines when the main power is restored. It allows for parameter uploading/downloading and diagnostic monitoring without having to energize the high-voltage power stage, significantly improving safety for maintenance technicians and commissioning engineers.
Key Technical Characteristics
- Part Number: SM-APS-LITE.
- Input Voltage: +24V DC (±10%).
- Module Type: Auxiliary Power Supply (Lite version).
- Compatibility: Unidrive SP (Frames 0 to 6), Digitax ST.
- Slot Usage: Fits into any standard Solutions Module slot.
- Function: Keeps control logic and communications active.
- Isolation: Electrical isolation between 24V input and drive power.
- Safety: Simplifies troubleshooting in high-voltage cabinets.
Industrial Application and Integration
In large-scale manufacturing plants using Profibus, EtherCAT, or CANopen, a lost drive on the network can trip the entire line. The SM-APS-LITE prevents this by ensuring the network node remains active regardless of the AC line status. The module is ruggedly built to withstand industrial noise and vibration. Its low power consumption makes it easy to power from a central 24V DC supply within the control cabinet. Its slim-line design does not interfere with the installation of other I/O or communication modules.
| Feature | Value |
| Input Current | Max 500mA |
| Mounting | Drive internal SM slot |
| Reliability | Industrial grade semiconductors |
Technical Note
When using the SM-APS-LITE, ensure the external 24V DC supply is regulated and adequately fused. This module is specifically useful for applications requiring absolute encoders, as it helps maintain position data (if the encoder is powered via the drive) during brief power interruptions. It is an «install and forget» component that adds a vital layer of system resilience.
¿Necesita más referencias de esta marca? Explore nuestro catálogo completo de Nidec aquí.
