Siemens SIMATIC S7-400 Power Supply PS407 6ES7407-0DA02-0AA0

Overview

The Siemens SIMATIC S7-400 power supply PS407 with MLFB 6ES7407-0DA02-0AA0 supplies the S7-400 rack with 5 V DC at 4 A from a wide-range input of 120/230 V AC/DC. The PS407 is the standard power supply module of the S7-400 family, powering the CPU, interface modules and all other modules in the central rack and expansion racks, and it is approved for use in hazardous locations.

Engineering and Design

The PS407 6ES7407-0DA02-0AA0 converts the incoming 120 V or 230 V supply, AC or DC, into the regulated 5 V DC logic supply of the S7-400 backplane. The wide-range input compensates for site supply variations, and the module provides the control and diagnostic functions that report supply status to the S7-400 system. The 4 A output covers typical rack configurations with a CPU, two interface modules and a full set of I/O and function modules.

The Siemens PS407 power supply is inserted in slot one of the S7-400 rack or in the dedicated power supply slot of an expansion rack, and the total 5 V consumption of the rack determines whether the 4 A capacity is sufficient. A standard configuration with one CPU, one or two interface modules and a complement of I/O modules fits within the PS407 capacity, and the module status is shown by the front indicators and read through the S7-400 diagnostics. Hot swapping is supported by the S7-400 backplane design.

Key Features

• 5 V DC output with 4 A current capacity
• Wide-range input 120/230 V UC (AC/DC)
• Standard S7-400 power supply for central and expansion racks
• Integrated status and diagnostics signalling
• Approved for hazardous-location installation
• MLFB 6ES7407-0DA02-0AA0 for direct ordering

Applications

The SIMATIC PS407 is used in S7-400 based PLC systems for process control, power generation, water treatment, oil and gas and manufacturing automation. When the 4 A capacity is insufficient, the S7-400 range offers higher-current PS variants; for most standard racks the 6ES7407-0DA02-0AA0 is the planned spare kept by plants across Oman and the GCC.

When the S7-400 system is extended with additional modules, the 5 V load budget should be recalculated before the extension is ordered, and the next PS variant provides the higher output if required. The wide-range input of the 6ES7407-0DA02-0AA0 accepts both 120 V and 230 V supplies, which simplifies the spare stock for plants with mixed site supplies. The hazardous-location approval covers installation in classified areas where the S7-400 rack is permitted.

Rack loading is covered in the S7-400 system manual, which lists the 5 V consumption of each module type; the sum is checked against the 4 A capacity of the PS407 before new modules are added to the rack.

The schedule of the rack is printed on the system documentation of the plant and checked at each maintenance window.

The supply cable of the rack is fused at the panel distribution board.

Specifications

Siemens supplies the Siemens PS407 power supply with the S7-400 documentation set, and the MLFB number is printed on the module front for identification during maintenance. The module exports its diagnostics to the S7-400 CPU, which reports the supply status in the plant alarm list.

Siemens PS407 power supply modules of the same MLFB can be swapped between racks of the same dumping group during maintenance, and the spare can be shared across several S7-400 systems in one plant. This keeps the spare holding small.

Why Seven Star LLC

Seven Star LLC supplies genuine Siemens SIMATIC S7-400 modules, including the PS407 power supply 6ES7407-0DA02-0AA0, to process and factory automation plants across the Gulf. We verify the MLFB number, supply voltage and output current against your rack configuration before release, and we support the full S7-400 module range.

Call To Action

Submit a formal inquiry through our RFQ page with your S7-400 rack configuration and the modules you plan to power. Our team will confirm the correct PS407 supply and provide a detailed quotation.