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1771-HMA Wiring

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  • 1771-HMA
  • 1771-HMA Wiring
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The Allen Bradley 1771-HMA is a 96K CMOS memory cartridge which is used with the IMC 120 system and is MARINE certified. The 1771-HMA is a lithium battery backed memory module; the IMC 120 system must have this memory module for it to function as required. This memory module has 70.5 K available user memory; the battery used to back the 1771-HMA memory module has a maximum lifespan of 10 years, which is made possible by the low self-discharge nature of the battery. This battery is made up of a 1/6 D size lithium wafer cell fixed on the board or has a connector that goes into a socket.


The lithium battery provides a current of 1700 mAh and has a voltage of 3.6 Volts DC. Its capacity provides the perfect back-up source of power for the 1771-HMA CMOS memory cartridge. The 1771-HMA has an approximate weight of 2 pounds and operates optimally at temperatures of between 0 and 60 degrees Celsius. The memory module has a storage temperature rating of between -40 and +85 degrees Celsius and must be operated at humidity levels between 5 and 95 percent without condensation. The battery used to back up the 1771-HMA memory cartridge is mostly used for industrial memory applications. To connect it to the board for the battery to provide the back-up power to the memory module, it uses a 3 Pin connector terminal. The 1771-HMA is used for the storage of MML programs and the AMP parameters. It’s also the overall memory module for the entire IMC 120 servo controller module.

Other Automation PLC-5

SKU 2175010  UPC 0799705798182

AB 96K Memory Cartridge 1771H 1771HM

Troubleshooting and Product Information for 1771-HMA

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PLC-5 1771-HMA
Weight: 2 Lbs
Dimensions: 10"x12"x2"In
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Weight: 2 Lbs
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