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6ES7478-2CA00-0AC0

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Siemens 6ES7478-2CA00-0AC0 is the SIMATIC M7-400 ATM478 expansion module for one short AT-format card. It supplies and monitors the AT rails while passing the M7 backplane through paired 120-pin connectors.
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Technical specifications for 6ES7478-2CA00-0AC0

  • Manufacturer:
    Siemens
  • Part Number:
    6ES7478-2CA00-0AC0
  • Product Family:
    Siemens Simatic S7-400
  • Product Type:
    ATM478 Expansion Module
  • Stock:
    1
  • Module designation:
    ATM478
  • Supported expansion:
    One short AT card
  • Backplane connectors:
    120-pin left, 120-pin right and 98-pin AT connector
  • Supply:
    5 V DC
  • Current consumption:
    Approximately 0.12 A
  • Power dissipation:
    Approximately 0.6 W
  • Mass:
    Approximately 0.74 kg
  • Maximum AT-card size:
    164 x 106.5 x 14 mm
  • AT-card +5 V capacity:
    4 A
  • AT-card +12 V capacity:
    500 mA
  • Voltage monitoring:
    -5 V, +12 V and -12 V with INTF indication
  • Loss budget without forced ventilation:
    10 W including the AT card
  • Loss budget with forced ventilation:
    12 W including the AT card
  • Weight:
    1.631 lbs (0.74 kg)
  • Tariff Code:
    8537101190
  • 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 Applications Installation & Integration Performance & Efficiency Configuration

Features:

  • One short AT card is accommodated through a dedicated 98-pin interface.
  • The module supplies +5 V, -5 V, +12 V and -12 V rails with current limits.
  • INTF monitoring covers the -5 V, +12 V and -12 V auxiliary supplies.
This order number maps to ATM478, the M7-400 carrier used to add one legacy AT peripheral.

Backplane signals pass through the twin 120-pin connectors while local conversion distributes and supervises the AT supply rails.

Match the card dimensions, rail demand, driver and cooling method before reinstalling the peripheral in the expanded station.

Apter Power can support exact-model configuration review and quotation for Siemens 6ES7478-2CA00-0AC0.
Verified resources for Siemens 6ES7478-2CA00-0AC0: 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.
  • M7-400 stations can host a supported communication or peripheral interface supplied as a short AT card.
  • Legacy automation computers can retain application-specific AT hardware while the carrier preserves the M7 bus chain.
  • Service teams can isolate an INTF condition by checking the monitored auxiliary rails and the inserted peripheral load.
  • The AT card plugs into the 98-pin connector while paired 120-pin interfaces continue the M7 backplane path.
  • One short AT card can be installed, provided its electrical load and mechanical envelope remain within the module limits.
  • The assembly combines left and right 120-pin backplane connectors with a dedicated 98-pin AT-card interface.
  • A regulated 5 V DC backplane supply powers the interface and the installed short AT expansion card.
  • Typical current consumption is approximately 0.12 A before any separately specified load from the fitted AT card.
  • Approximate dissipation of 0.6 W keeps the base module's thermal contribution low inside the M7 station.
  • The ATM478 configuration provides the mechanical and electrical carrier for one approved short-format AT card.
  • A 25 x 290 x 230 mm module envelope must be accommodated without obstructing adjacent M7 components or airflow.
  • Card function, resource allocation and connector assignment must be confirmed for the target M7 station before installation.
Description
6ES7478-2CA00-0AC0 The ATM478 extends a SIMATIC M7-400 automation computer with one approved short AT card. A 98-pin AT connector accepts the peripheral, while left and right 120-pin interfaces continue the M7 module chain through the station.

The base module draws about 0.12 A from 5 V and supplies the inserted card with +5 V, -5 V, +12 V and -12 V rails within defined current limits. Monitoring of the three auxiliary rails raises the INTF indication when a required AT supply is not within the expected condition.

The peripheral card's 164 x 106.5 x 14 mm envelope and power loss determine whether the assembly can operate with or without forced ventilation. Driver support, slot resources and the total thermal budget must be verified before an AT card is transferred to a spare ATM478.
Alternative Names
6ES7478-2CA00-0AC0 6ES7478 2CA00 0AC0 6ES74782CA000AC0 Siemens 6ES7478-2CA00-0AC0 Siemens 6ES7478 2CA00 0AC0 6ES7478-2CA00-0AC0 ATM478 Expansion Module Siemens 6ES7478-2CA00-0AC0 SIMATIC M7-400 6ES7478-2CA00-0AC0 Catalog Number
Technical notes
Before fitting an AT card to 6ES7478-2CA00-0AC0, calculate the card's rail currents and loss power; the ATM478 permits 10 W without forced air and 12 W with forced ventilation.
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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 card format fits 6ES7478-2CA00-0AC0?
ATM478 accepts one short AT card within the maximum envelope of 164 x 106.5 x 14 mm.
Which voltages are monitored by 6ES7478-2CA00-0AC0?
The module monitors -5 V, +12 V and -12 V and indicates an internal fault when those rails are not valid.
How much +5 V current can the AT card draw from 6ES7478-2CA00-0AC0?
The +5 V AT supply provides up to 4 A, subject to the overall thermal limit.
When is forced ventilation needed with 6ES7478-2CA00-0AC0?
It depends on combined loss power; the limit rises from 10 W without forced air to 12 W with forced ventilation.
What software check belongs to a 6ES7478-2CA00-0AC0 exchange?
Confirm that the operating image contains the correct driver and resource settings for the exact installed AT peripheral.
How can the installed AT peripheral be matched to a 6ES7478-2CA00-0AC0 carrier?
Provide the ATM478 label, AT-card manufacturer and model, rail load, M7 station details, photographs and required quantity.