6ES7405-0DA01-0AA0 - Power Supply Module - SIEMENS

Siemens Power Supply 6ES7405-0DA01-0AA0 - SIMATIC S7-400

The power supply with reference 6ES7405-0DA01-0AA0 belongs to the SIMATIC S7-400 series from SIEMENS. Designed for high-availability PLC architectures, it delivers a regulated 24 V DC output with a nominal current of 4 A to feed CPUs, I/O modules and peripheral devices connected to the S7-400 chassis. This unit targets industrial environments where supply-voltage stability affects process availability and measurement reliability. It integrates directly into existing systems based on SIMATIC S7-400 without modifying the control architecture. With dimensions of 200 x 100 x 50 mm and a weight of 1.5 kg, its form factor simplifies preventive or corrective replacements, reducing plant downtime. This reference meets the maintenance and modernization requirements of production lines, utilities and PLC-controlled infrastructures by ensuring stable power distribution across the SIMATIC rack. The 2-year warranty provides additional security for operators seeking a durable and traceable solution within their operational maintenance policy.

Technical specifications

• Manufacturer reference: 6ES7405-0DA01-0AA0
• Range: SIMATIC S7-400
• Manufacturer: SIEMENS
• Category: Power supply module for programmable controller
• Output voltage: 24 V DC regulated
• Nominal output current: 4 A
• Compatibility: chassis and controllers SIMATIC S7-400
• Integration: direct mounting on S7-400 chassis, connection to the backplane
• Dimensions: 200 x 100 x 50 mm
• Weight: 1.5 kg
• Use: powering CPUs, I/O modules and associated peripherals
• Warranty: 2 years

Overview of the SIMATIC S7-400 range

The SIMATIC S7-400 series is an automation platform designed for process control systems and installations with high I/O density. The modular architecture is based on chassis that house power supplies, CPUs, input/output modules, communication interfaces and technology cards. Power supply modules play a central role by ensuring the energy stability required for the reliability of the PLC and its subsystems. This electrical coherence directly contributes to measurement quality, service continuity and component lifespan.

• SIMATIC power supplies: provide regulated 24 V DC to the S7-400 backplane for CPUs and modules, supporting high availability of automation systems.
• Expansion modules and interfaces: complete the S7-400 ecosystem by providing connectivity to I/Os and industrial networks, following SIMATIC native integration principles.

The model 6ES7405-0DA01-0AA0 fits within this system logic, sized for S7-400 chassis and ensuring compatibility for straightforward replacement during planned or corrective maintenance.

Industrial applications

This power supply module is intended for automation systems that require a stable 24 V DC distribution to drive CPUs and I/O modules. Its 4 A capacity covers the common operational needs of S7-400 chassis across multiple industry sectors.

• Industrial processes: supervision of reactors, dosing lines, weighing and continuous control where 24 V DC stability is essential for control accuracy.
• Intralogistics and conveying: powering controllers coordinating sensors, emergency stops and actuators on transfer lines and carousels.
• Assembly and packaging: assembly cells, bagging and bundling machines controlled by S7-400 with distributed I/O.
• Industrial utilities: control of auxiliary units, HVAC, process or service pumps instrumented by a PLC.
• Infrastructure: water treatment stations, technical substations and transport installations equipped with SIMATIC.

Integration and communication

The 6ES7405-0DA01-0AA0 power supply integrates via connection to the S7-400 chassis backplane. This approach avoids major electrical reconfiguration and simplifies replacement by maintenance teams. The stated mechanical size, 200 x 100 x 50 mm, allows tool-free insertion into existing racks. The 1.5 kg weight permits straightforward handling during scheduled interventions. The supply provides the 24 V DC required by modules connected to the rack, in line with SIMATIC topology.

The power supply does not require a dedicated communication protocol. Functional integration is based on electrical distribution via the backplane, following the native logic of the SIMATIC S7-400 system. This design supports consistent commissioning, fast electrical diagnostics and improved service continuity when the load stays within the nominal current range.

Availability and warranty

The SIEMENS power supply 6ES7405-0DA01-0AA0 is offered by Standard Exchange Industry as new supply and as exchange units, with repair options depending on the condition of your equipment. Units are bench-tested before dispatch, and the 2-year warranty reflects the quality-control standards applied. Shipping is arranged within 24 to 72 hours to many destinations to minimize plant downtime. To confirm compatibility of the reference with your SIMATIC S7-400 chassis, our technical team assists with precise configuration identification and recommends the most suitable solution between replacement, exchange unit or repair.