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6ES7407-0RA02-0AA0

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Siemens 6ES7407-0RA02-0AA0 is a SIMATIC S7-400 PS 407 power supply module that feeds the rack backplane and provides a 24 V DC auxiliary output.
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Technical specifications for 6ES7407-0RA02-0AA0

  • Manufacturer:
    Siemens
  • Part Number:
    6ES7407-0RA02-0AA0
  • Product Family:
    Siemens Simatic S7-400
  • Product Type:
    SIMATIC S7-400 PS 407 20 A Power Supply Module
  • Stock:
    1
  • Input Voltage Range:
    85 to 264 V AC or 88 to 300 V DC
  • Supply Frequency:
    47 to 63 Hz
  • Backplane Output:
    5 V DC at 20 A
  • Auxiliary Output:
    24 V DC at 1 A
  • Required Rack Width:
    2 slots
  • Power-Failure Buffer:
    20 ms
  • Typical Power Loss:
    35 W
  • Backup Battery:
    Optional
  • Operating Temperature:
    0 to 60 °C
  • Protection Rating:
    IP20
  • Weight:
    2.866 lbs (1.3 kg)
  • Estimated shipping dimensions:
    5x29x21.7cm
  • Tariff Code:
    85044095
  • Country of origin:
    Germany
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Rack Power Path Auxiliary Output Buffer and Battery Status Indication

Features:

  • A wide-range AC or DC input feeds the SIMATIC S7-400 rack supply.
  • The 5 V backplane output delivers up to 20 A to installed rack modules.
  • A separate 24 V DC output serves the documented auxiliary circuit.
Input conversion and rack distribution remain inside the two-slot power-supply module.

The backplane carries the regulated 5 V supply to the CPU and other S7-400 modules.

Status indicators and the optional battery path expose different supply and backup conditions.

The Siemens 6ES7407-0RA02-0AA0 SIMATIC S7-400 PS 407 20 A Power Supply Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Siemens 6ES7407-0RA02-0AA0 PS 407 Power Supply Module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Following energy from the supply terminals to the S7-400 backplane

  • Input stage: The documented AC or DC source enters through the front supply terminals.
  • Conversion stage: Internal conversion produces the regulated rack voltage.
  • Backplane feed: The 5 V output is distributed to modules through the rack connector.
  • Load total: The sum of installed module currents must remain within the 20 A output.

Keeping the 24 V auxiliary circuit separate from the rack feed

  • Output purpose: The front 24 V terminal serves its documented auxiliary load.
  • Current limit: The connected circuit must remain within the 1 A rating.
  • Reference path: Return wiring belongs to the assigned auxiliary-output terminals.
  • Rack distinction: The auxiliary output does not replace the 5 V backplane supply.

Relating brief input loss to rack backup behavior

  • Input buffering: Stored energy maintains the rack output for the documented interruption time.
  • Battery option: Installed backup batteries support the defined S7-400 backup function.
  • Polarity check: Battery orientation must match the marked holder.
  • Service boundary: Battery condition and external input faults produce different indications.

Using front LEDs to separate supply conditions

  • Rack output: The output indicator confirms the regulated backplane supply state.
  • Input fault: Loss of the incoming source changes the associated status.
  • Battery status: A separate indication identifies a missing or depleted backup battery.
  • Fault response: The LED pattern should be compared with the rack diagnostic condition before modules are removed.
Description
Designed for the SIMATIC S7-400 rack, Siemens 6ES7407-0RA02-0AA0 is a PS 407 power supply module that converts the incoming plant supply into the regulated voltage used by installed modules. Its 20 A backplane capacity serves larger rack configurations while the separate auxiliary output supplies the documented 24 V circuit.

Within the central rack, 6ES7407-0RA02-0AA0 sends 5 V DC through the backplane rather than through front field terminals. Every installed CPU, communication processor and signal module contributes to that shared load, so the rack calculation must remain below the power-supply capacity.

Input power for 6ES7407-0RA02-0AA0 can come from the documented AC or DC range, with the protective conductor and input selection completed before startup. The internal buffering keeps the rack supply present through a brief input interruption, after which the module reports the loss to the connected rack.

Front indicators on 6ES7407-0RA02-0AA0 distinguish normal output operation from battery, internal or external supply conditions. The optional backup batteries serve the S7-400 backup path and must be installed with the specified polarity rather than treated as a substitute for the rack input.
Alternative Names
6ES74070RA020AA0 6ES7 407-0RA02-0AA0 6ES7407 0RA02 0AA0 Siemens 6ES7407-0RA02-0AA0 6ES7-407-0RA02-0AA0 6ES7407-0RA02-0AAO 6ES74O7-0RA02-0AA0 6ES7407 0RA02 0AAO
Technical notes
Power for Siemens 6ES7407-0RA02-0AA0 enters through its wide-range supply terminals; verify the selector, protective conductor and rack load before energizing the S7-400 station.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What should be calculated before adding modules behind Siemens 6ES7407-0RA02-0AA0?
Add the 5 V backplane current of every installed module and keep the total below the 20 A capacity of Siemens 6ES7407-0RA02-0AA0.
Can 6ES7407-0RA02-0AA0 accept both AC and DC plant supplies?
Yes. 6ES7407-0RA02-0AA0 accepts the documented AC or DC input range, but the front input selection and wiring must match the actual source.
Why does the rack shut down although 24 V is present at 6ES7407-0RA02-0AA0?
The auxiliary 24 V output and the 5 V rack output of 6ES7407-0RA02-0AA0 are separate; check the input, rack connector, total load and output status.
Which part of 6ES7407-0RA02-0AA0 bridges a short power interruption?
Stored energy inside 6ES7407-0RA02-0AA0 maintains the regulated rack output for the documented buffering time.
How should a battery warning on 6ES7407-0RA02-0AA0 be investigated?
Inspect the 6ES7407-0RA02-0AA0 battery presence, polarity and condition while keeping the rack input and output indications separate.
Does a PS 407 label alone identify 6ES7407-0RA02-0AA0?
No. Match the complete 6ES7407-0RA02-0AA0 order number because PS 407 versions differ in rack-output capacity and configuration.