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OVERVIEW
Official designation: Allen-Bradley 1756-M1 (ControlLogix, Expansion Memory Module)
Role/Application: Expands volatile data storage for legacy Logix5550 processors to handle larger instruction sets and tags.
KEY SPECS SUMMARY
Power: From controller
Interfaces / Ports: Internal header
Indicators: N/A
Operating Temp: 0 degrees C to 60 degrees C
Platform / Compatibility: ControlLogix L1
Limit: 512 KB add-on
Lifecycle: End of Life
FREQUENTLY ASKED QUESTIONS
Technical Specifications:
Q: What is the exact memory size of the 1756-M1?
A: It provides 512 KB of additional SRAM for the processor.
Wiring & Installation:
Q: Does this module require an external power supply?
A: No, it draws power directly from the processor mainboard.
Troubleshooting & Compatibility:
Q: Can this be used with 1756-L7 series controllers?
A: No, it is designed only for early 1756-L1 series CPUs.
Replacement & Upgrades:
Q: What is the recommended upgrade path for this module?
A: Replace the entire CPU with a modern 1756-L8 series controller.
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| Country of Manufacture or Origin | See this page for details |
| Manufacturer | See this page for details |
| After-sales Service Contact or Customer Support Number | See this page for details |
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