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.