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6ES7478-2BA00-0AC0

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Siemens 6ES7478-2BA00-0AC0 is the SIMATIC M7-400 MSM478 mass-storage module with a 3.5-inch 1.44 MB floppy drive, hard disk and LPT1 interface. It supports program and operating-system storage in legacy M7 stations.
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Technical specifications for 6ES7478-2BA00-0AC0

  • Manufacturer:
    Siemens
  • Part Number:
    6ES7478-2BA00-0AC0
  • Product Family:
    Siemens Simatic S7-400
  • Product Type:
    MSM478 Mass-Storage Module
  • Stock:
    1
  • Module designation:
    MSM478
  • Parallel interface:
    LPT1
  • Floppy drive:
    3.5 inch, 1.44 MB
  • Hard-disk capacity:
    At least 516 MB in the documented execution
  • Backplane connector:
    120-pin
  • External connector:
    25-pin sub-D for LPT1
  • I/O address:
    03BC to 03BE
  • Interrupt:
    IRQ 7
  • Maximum printer cable:
    3 m
  • Supply:
    5 V DC, approximately 1 A
  • Power dissipation:
    Approximately 5 W
  • Mass:
    Approximately 1.08 kg
  • Operating temperature without forced ventilation:
    0 to +40 deg C
  • Operating temperature with forced ventilation:
    0 to +55 deg C without disk; 0 to +40 deg C with disk
  • Operating temperature change:
    Maximum 10 K/h
  • Relative humidity:
    8 to 80% at 25 deg C, non-condensing
  • Operating altitude:
    -50 to 2000 m
  • Storage temperature:
    -10 to +60 deg C
  • Storage temperature change:
    Maximum 20 K/h
  • Weight:
    2.381 lbs (1.08 kg)
  • Tariff Code:
    84717050
  • 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 Compatibility Installation & Integration Communication & Connectivity

Features:

  • The module combines a 3.5-inch 1.44 MB floppy drive with a hard disk of at least 516 MB.
  • An AT-compatible bidirectional LPT1 port is exposed through a 25-pin sub-D connector.
  • The 5 V assembly draws about 1 A and has a stated power loss of approximately 5 W.
The full order number identifies MSM478, the storage and parallel-interface module for SIMATIC M7-400.

Backplane access links the drives and LPT controller to the automation computer's legacy PC-compatible resources.

Create verified media images and document BIOS, address and interrupt settings before swapping the 1.08 kg module.

Apter Power can support exact-model configuration review and quotation for Siemens 6ES7478-2BA00-0AC0.
Verified resources for Siemens 6ES7478-2BA00-0AC0: 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 programs and operating-system files can reside on the internal hard disk for local autonomous operation.
  • Legacy transfer or maintenance procedures can use the 1.44 MB floppy drive where the application still depends on it.
  • A compatible printer or parallel peripheral can be attached to the LPT1 interface with a cable up to 3 m.
  • Disk contents, BIOS LPT1 settings, IRQ allocation and operating-system drivers must be preserved before replacement.
  • Program, operating-system and archive storage are supported in M7 installations that depend on the integrated drives.
  • The MSM478 execution must match the host station's backplane, peripheral and software-resource requirements.
  • The integrated 3.5-inch floppy drive accepts 1.44 MB media for supported service and data-transfer workflows.
  • A 120-pin backplane connector provides the mechanical and electrical interface to the assigned M7 station slot.
  • Drive fit, cable routing and retained BIOS settings must be checked before the storage module is returned to service.
  • The LPT1 parallel interface provides an external connection for compatible legacy printers or service peripherals.
  • A 25-pin sub-D connector carries the parallel port signals and must use the prescribed cable and pin assignment.
  • Backplane communication passes through the 120-pin station connector to the host M7 system resources.
Description
6ES7478-2BA00-0AC0 MSM478 adds local mass storage and a bidirectional parallel port to the M7-400 computer platform. The execution contains a 1.44 MB floppy drive, a hard disk of at least 516 MB and a 25-pin sub-D connector for LPT1.

The module occupies the I/O address range 03BC–03BE hex and uses IRQ 7 for the parallel interface. It draws about 1 A from the 5 V supply and dissipates approximately 5 W, while the installed disk constrains the permissible operating temperature even when forced ventilation is available.

Storage content is often more important than the removable hardware itself. A sector-level backup, BIOS and LPT resource record, operating-system driver inventory and application recovery test should be completed before the original MSM478 is disturbed.
Alternative Names
6ES7478-2BA00-0AC0 6ES7478 2BA00 0AC0 6ES74782BA000AC0 Siemens 6ES7478-2BA00-0AC0 Siemens 6ES7478 2BA00 0AC0 6ES7478-2BA00-0AC0 MSM478 Mass-Storage Module Siemens 6ES7478-2BA00-0AC0 SIMATIC M7-400 6ES7478-2BA00-0AC0 Catalog Number
Technical notes
Back up the hard disk of 6ES7478-2BA00-0AC0 before power-down and preserve LPT1 address 03BC–03BE hex with IRQ 7; replacement hardware alone does not restore the M7 application.
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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 storage devices are included in 6ES7478-2BA00-0AC0?
The MSM478 execution includes a 3.5-inch 1.44 MB floppy drive and a hard disk of at least 516 MB.
Which resources does the LPT1 port of 6ES7478-2BA00-0AC0 use?
It occupies I/O addresses 03BC–03BE hex and uses interrupt IRQ 7.
How does the installed disk affect 6ES7478-2BA00-0AC0 temperature limits?
With disk operation the upper temperature remains 40 °C, even where forced ventilation is provided.
Why is a disk image essential before replacing 6ES7478-2BA00-0AC0?
The application, operating system and site data may exist only on the installed hard disk and are not supplied with a spare module.
What external peripheral can use 6ES7478-2BA00-0AC0?
The bidirectional 25-pin LPT1 interface supports a compatible parallel device within the 3 m cable limit.
Which storage-recovery facts should accompany a 6ES7478-2BA00-0AC0 order?
Include the MSM478 label, disk and floppy details, M7 CPU, operating system, backup status, LPT use and destination.