Atlas Copco SAM-PA-400-30-E Power Supply Module – Industrial Power Solution
The Atlas Copco SAM-PA-400-30-E power supply module, also known as Socapel SAM, is a high-performance AC-to-DC power supply designed for industrial automation and control systems. It provides a regulated 30 V DC output with a capacity of 400 W, making it suitable for powering controllers, I/O modules, sensors, and other electronic devices in machine cabinets. The module features a compact, DIN-rail-mountable design and is built for reliable operation in harsh factory environments.
Electrical Specifications
The power supply accepts a wide input voltage range (typically 85–264 V AC) with active power factor correction, ensuring compatibility with global electrical grids. The output voltage is adjustable within a limited range to accommodate specific load requirements. The unit delivers a continuous current of approximately 13.3 A at 30 V DC. Efficiency exceeds 90% at full load, reducing heat generation and energy costs. Ripple and noise are kept low to avoid interference with sensitive electronics.
Protection and Safety Features
The SAM-PA-400-30-E incorporates comprehensive protection mechanisms: overcurrent protection with automatic recovery, overvoltage crowbar, short-circuit protection, and overtemperature shutdown. The output is electronically isolated from the input for safety. The module also includes a DC OK relay contact for remote status monitoring, enabling the control system to detect power failures. Compliance with EN 60950 and UL standards ensures safe installation.
Design and Construction
The power supply is housed in a ventilated metal enclosure with a built-in cooling fan (thermostatically controlled) to maintain optimal temperature. Input and output terminals are clearly marked and designed for secure wire connections. The unit is suitable for horizontal mounting on standard 35 mm DIN rails. The front panel includes LED indicators for input presence, output active, and fault conditions.
Installation and Wiring
Installation requires mounting the module in a well-ventilated control cabinet, with sufficient clearance around the unit for airflow. Input wiring must be sized appropriately for the current rating, and a fuse or circuit breaker is recommended on the AC side. Grounding is essential for safety and EMI reduction. Output wiring should be routed separately from high-voltage cables to minimise noise coupling.
Application Areas
This power supply module is commonly used in Atlas Copco control systems, but it is also suitable for general industrial automation. It powers PLCs, operator panels, communication devices, and solenoid valves. Its 30 V output is particularly useful for systems that require a slightly higher voltage than standard 24 V to compensate for voltage drops over long cable runs.
Efficiency and Thermal Management
High efficiency means less power is dissipated as heat, which extends the life of internal components and reduces the need for additional cooling. The temperature-controlled fan only operates when needed, minimising noise and energy consumption. The module is rated for continuous operation in ambient temperatures up to 60°C with derating.
Maintenance and Reliability
Maintenance is limited to periodic cleaning of ventilation openings and checking fan operation. The power supply is designed for long-term reliability with typical MTBF exceeding 100,000 hours. In case of failure, the module can be quickly replaced without special tools. Spare units are readily available through Atlas Copco distribution channels.
Compliance and Certifications
The SAM-PA-400-30-E carries CE marking and is certified to UL 508 and CSA standards. It also meets RoHS and REACH requirements for environmental compliance. These certifications facilitate its use in equipment destined for global markets.
Integration with Automation Systems
The DC OK signal can be connected to a PLC input to trigger alarms or system shutdown in case of supply failure. This integration enhances system reliability by enabling proactive response to power issues. The module’s output can be paralleled with another identical unit for redundancy, using appropriate isolation diodes.
Conclusion
The Atlas Copco SAM-PA-400-30-E power supply module is a reliable and efficient power source for industrial automation. Its robust design, comprehensive protections, and high efficiency make it a solid choice for powering critical control equipment in demanding environments.
