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OVERVIEW
Official designation: Allen-Bradley 1756-M23 (ControlLogix, Expansion Memory Module)
Role/Application: Provides additional volatile storage for Logix5555 controllers to support extensive tags and complex logic execution in industrial systems.
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 L55
Limit: 750 KB total
Lifecycle: End of Life
FREQUENTLY ASKED QUESTIONS
Technical Specifications:
Q: What is the specific memory capacity added by the 1756-M23?
A: It adds 750 KB of SRAM to the host controller.
Wiring & Installation:
Q: How is the 1756-M23 installed in the ControlLogix system?
A: Plug it directly into the memory slot of the controller.
Troubleshooting & Compatibility:
Q: Which controllers are compatible with this memory module?
A: It works exclusively with early 1756-L55 series processors.
Replacement & Upgrades:
Q: What is the modern replacement for a 1756-M23 system?
A: Upgrade to 1756-L7 or L8 controllers with built-in memory.
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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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