Reliance Electric 57C423 Common Memory Module
The 57C423 is a Common Memory Module created by Reliance Electric. Depending on the production years, it may have also been manufactured by Asea Brown Boveri or Baldor Reliance.
The technical details:
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Memory Capacity:
- Stores configuration data that must be shared among processors, such as definitions of physical I/O.
- Can store 256K bytes of memory.
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Capacity Expansion:
- The super-capacitor can be charged to more than 90% of its rated capacity in approximately 8 minutes.
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Software Compatibility:
- Supported by Program Executive software versions 2.1E, 3.1C, and later versions.
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Functionality:
- Facilitates communication between processors on the same rack using a Multibus P1 bus.
- Stores system configuration tasks and acts as a backup for RAM in case of system failure.
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Indicators:
- LED indicators for BAT.OK (battery backup status) and SYSTEM WATCHDOG (processor module failure).
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Manual:
- The manual for the 57C423 is the Common Memory Module Manual - Manual J-3636.
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