Technical Specifications
- Product Model: SCH24-40A
- Brand: SCH
- Warranty: One Year
- Input Voltage: 3-phase AC 380–480 V, 50/60 Hz
- Operating Temperature: -25°C ~ +60°C (derating above 60°C)
- Storage Temperature: -40°C ~ +70°C
- Response Time: ≤ 20 ms load transient recovery
- Protection Class: IP20, DIN rail cabinet mounting
- Accuracy Class: ±1% output voltage regulation
- Output Frequency: N/A
- Rated Current Range: 40 A continuous @ 24 VDC (960 W nominal)
- Communication Interface: Relay DC-OK status contact
- Supported Protocols: N/A
- Overload Capacity: 150% peak overload for 4 seconds; auto-recovery short-circuit protection
- Dimensions (W×H×D): 110 mm × 124 mm × 128 mm
Product Overview
The SCH24-40A is a high-power three-phase DIN rail switching mode power supply delivering regulated 24 VDC output for heavy-duty industrial automation loads. This AC-DC conversion unit stabilises DC power for high-current field equipment, mitigating mains voltage fluctuations and transient surges that cause unstable sensor readings, PLC reset or actuator malfunctions. Control panel builders, system integrators and plant maintenance teams utilising SCH power hardware rely on this unit to deliver consistent power to distributed I/O modules, solenoid banks, valve actuators and HMI infrastructure. High conversion efficiency reduces cabinet thermal load, and integrated fault protection ensures reliable 24/7 continuous operation within manufacturing, marine and process control environments. (Word count: 169)
Key Functions
- High-Current Regulated 24 VDC Output: Delivers steady 24 VDC power up to 40 A continuous capacity, supporting large groups of field instruments and electromechanical loads. Fine adjustable output voltage compensates voltage drop on long field wiring runs.
- Multi-Stage Electronic Fault Protection: Built-in overvoltage, overcurrent and short-circuit protection with automatic restart after fault clearance. Fault isolation prevents damage propagation to connected PLCs, sensors and valve drive hardware.
- DC-OK Status Monitoring Relay: Potential-free relay contact signals stable output voltage to supervisory systems. Operators can implement remote power supply health monitoring and trigger alarm logic in SCADA or PLC programs.
- Optimised Thermal & DIN Rail Layout: Compact standard DIN rail form factor simplifies integration inside motor control centres and main automation cabinets. Efficient power topology lowers heat generation and extends service life in enclosed panel installations.
Application Scenarios
- Heavy Industry Automated Assembly Lines: Powers large banks of pneumatic solenoids, proportional valves and remote I/O racks. The SCH24-40A supplies stable DC power during frequent cyclic load changes for metal forming and robotic handling equipment.
- Water & Wastewater Pumping Station Control Cabinets: Feeds valve positioners, level transmitters and frequency converter auxiliary control circuits. Reliable three-phase input capability suits industrial sites with 400 VAC three-phase distribution networks.
- Marine Onboard Auxiliary Automation Panels: Used to power ship valve control systems, monitoring sensors and local operator panels. Stable output regulation resists voltage distortion common on vessel power grids.
- Legacy Automation Spare Replacement & Panel Retrofit: Drop-in high-power PSU upgrade for control cabinet refurbishments. Standard mechanical dimensions reduce modification work when replacing older 24 V industrial power supplies during planned shutdowns.
