Schneider Electric ATS48C25Q Soft Starter

Product Details

ATS48C25Q Product Description

The ATS48C25Q is engineered to function as a precision motor-control node within a fully integrated Schneider Electric automation architecture. Rather than operating as a standalone device, it is designed to be coordinated across multiple system layers — from the control layer down through the power and protection layers — ensuring consistent motor management, reduced mechanical stress, and predictable system behavior across the entire plant.

At the control layer, the ATS48C25Q interfaces directly with Schneider Electric Modicon M340 and Modicon M580 PLCs via Modbus RTU over RS-485, enabling real-time parameter monitoring, fault diagnostics, and remote start/stop commands without additional signal conditioning. In larger DCS environments, the soft starter integrates with EcoStruxure Process Expert and Foxboro DCS platforms through Profibus DP or DeviceNet communication gateways, maintaining consistent process loop integrity during motor start sequences.

At the I/O and signal layer, the ATS48C25Q accepts discrete control inputs from Schneider Electric TeSys D contactors and TeSys K motor starters, allowing coordinated sequencing in multi-motor applications such as pump stations, compressor banks, and conveyor systems. The internal bypass contactor eliminates SCR heat dissipation during steady-state operation, reducing thermal load on the control cabinet and extending the service life of adjacent components including Schneider Electric Acti9 circuit breakers and Compact NSX molded-case circuit breakers.

For communication and diagnostics, the ATS48C25Q supports Modbus RTU natively, and when paired with a Schneider Electric EGX300 Ethernet gateway or a Moxa NPort serial device server, it can be integrated into EtherNet/IP or PROFINET supervisory networks. This enables the SCADA layer — typically running on Schneider Electric Vijeo Citect or Wonderware InTouch — to receive live thermal state, current imbalance, and fault history data, supporting predictive maintenance workflows without requiring additional field instrumentation.

At the HMI layer, the ATS48C25Q parameters can be configured and monitored via Schneider Electric Magelis GTU HMI panels connected over Modbus TCP/IP, providing operators with real-time current curves, ramp profiles, and protection thresholds on a single touchscreen interface. This eliminates the need for dedicated handheld programming tools during commissioning and simplifies operator training in multi-drive environments.

In redundant architecture designs — common in water treatment, oil & gas, and power generation applications — the ATS48C25Q can be deployed in duty/standby motor configurations alongside Schneider Electric TeSys island distributed motor starters, with automatic changeover logic managed at the PLC level. This ensures uninterrupted process continuity even during scheduled maintenance or unexpected motor faults, without requiring manual intervention at the field level.

At the power layer, the ATS48C25Q is typically fed from Schneider Electric Masterpact NW or Compact NS air circuit breakers, with upstream harmonic filtering provided by Schneider Electric AccuSine PCS+ active harmonic filters where variable-frequency drive and soft starter loads coexist on the same MCC bus. This combination ensures power quality compliance with IEEE 519 and IEC 61000-3-12 standards across the full motor load spectrum.

Manufacturing & Packaging Lines: In automotive assembly and food & beverage packaging plants, the ATS48C25Q manages conveyor belt motors, mixer drives, and pump systems where controlled acceleration reduces product spillage, belt slippage, and mechanical coupling wear. Its torque-controlled ramp function is particularly effective in applications where load inertia varies between production runs, ensuring consistent start performance without manual parameter adjustment.

Water & Wastewater Treatment: Municipal water treatment facilities deploy the ATS48C25Q on centrifugal pump motors ranging from 75 kW to 132 kW, where soft starting eliminates water hammer effects in long pipeline systems. The built-in thermal protection and phase-loss detection reduce unplanned downtime in unmanned pump stations, while Modbus RTU connectivity allows remote monitoring from centralized SCADA systems without additional RTU hardware.

Power Generation & Utilities: In diesel generator auxiliary systems and power plant cooling water circuits, the ATS48C25Q provides controlled motor starting that prevents voltage dips on sensitive bus sections. Its compatibility with Schneider Electric Sepam protection relays and PM8000 power meters enables a fully coordinated protection and monitoring scheme within the same switchgear panel, reducing engineering integration time during project commissioning.

Oil, Gas & Petrochemical: Offshore platforms and onshore processing facilities use the ATS48C25Q in compressor pre-lube pump systems, seawater lift pumps, and gas injection motor applications. The device's wide supply voltage range (208–690 V AC) and robust thermal management make it suitable for both 400 V European and 480 V North American electrical systems within the same product family, simplifying global project standardization.

Mining & Metallurgy: In ore processing plants and smelting facilities, the ATS48C25Q controls ball mill auxiliary drives, slurry pump motors, and ventilation fan systems. Its internal bypass contactor ensures that SCR thermal losses do not accumulate during extended continuous-duty cycles, maintaining cabinet temperature within safe operating limits even in high-ambient underground environments.

Q1: Is the ATS48C25Q compatible with Modicon M580 PLCs for integrated motor control in a Modbus RTU network? Yes. The ATS48C25Q supports Modbus RTU over RS-485 natively, and Schneider Electric provides pre-built function blocks for Modicon M340 and M580 PLCs in Unity Pro / EcoStruxure Control Expert. These function blocks expose all soft starter parameters — including ramp time, current limit, thermal state, and fault codes — as structured PLC variables, enabling seamless integration into existing automation programs without custom protocol mapping. For EtherNet/IP or PROFINET networks, an EGX300 or third-party serial gateway bridges the RS-485 segment to the supervisory network.

Q2: What is the recommended cabinet layout when installing the ATS48C25Q alongside Compact NSX circuit breakers and TeSys D contactors? Schneider Electric recommends mounting the ATS48C25Q in a vertical orientation with a minimum 50 mm clearance on all sides for natural convection cooling. The upstream Compact NSX circuit breaker should be sized at 1.0× the soft starter's rated current (250 A) for normal-duty applications, or 1.25× for high-inertia loads. TeSys D contactors used for bypass or isolation duties should be wired in series with the soft starter output, not in parallel, to avoid SCR bypass conflicts. All control wiring should be routed in separate cable ducts from power wiring to prevent EMI-induced false triggering of the control inputs.

Q3: What does the 12-Month Warranty cover, and what pre-shipment testing is performed on the ATS48C25Q? Every ATS48C25Q unit supplied by NANKMOS undergoes pre-shipment functional testing that includes power-on verification, control input/output continuity checks, Modbus RTU communication validation, and thermal protection trip-point verification. The 12-Month Warranty covers manufacturing defects, component failures under normal operating conditions, and firmware-related malfunctions. Units are shipped with original Schneider Electric packaging and documentation. For long-term maintenance planning, NANKMOS maintains in-stock inventory of ATS48C25Q and related Altistart 48 series components, ensuring rapid replacement supply for critical process applications without extended lead times.