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1771-HMA

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The 1771-HMA memory cartridge is a PLC 5 series memory cartridge that is manufactured by Allen-Bradley. It is a plug-in type of module with 96K of user memory. The 1771-HMA memory cartridge is backed up by a lithium ion battery. It is usually used in various industrial memory applications. The 1771-HMA memory module is meant to operate at ambient temperatures of 32 to 140 degrees Fahrenheit or 0 to 60 degrees Celsius.

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Technical specifications for 1771-HMA

Manufacturer	Rockwell Automation
Brand	Allen-Bradley
Part Number/Catalog No.	1771-HMA
Module Type	96K CMO Memory Module
Fuse Voltage	120 Volts
Max Input Frequency	250 Kilohertz Differential Input
Outputs	+/- 10 Volt DC Analog Command
Slots	2 Slots Per ES
Module Update Period	2 ms/axis
Backplane Current	1.7 Amperes
Wiring Arm	1771-WA
Pulse Capture Time	50-9.999 Microseconds
Dimensions	3.5 x 6.5 x 2.0 in (89 x 165 x 51 mm)

Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

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The Allen-Bradley 1771-HMA memory cartridge is a CMOS memory cartridge. It is mainly used with IMC 120 systems. It is a lithium-ion battery-backed memory module from Allen-Bradley/Rockwell Automation. This memory cartridge has a memory capacity of 96 KB. The battery produces a current of 1700 mAh and it has a voltage rating of 3.6 Volts DC. The main function of this memory cartridge is to provide a backup source of power. It is mainly used for industrial memory applications. It uses a 3-pin connector terminal to connect to devices. The 1771-HMA memory cartridge is also used for storing the MML programs and the AMP parameters.

The Allen-Bradley 1771-HMA memory cartridge operates within a temperature range of 0 to 60 degrees Celsius and it can be stored at 0 to 60 degrees Celsius. The required humidity level for operation should be maintained between 5 and 95% without condensation. The 1771-HMA memory cartridge comes with a MARINE certification. The cartridge should not be used in or near places where there is a high amount of electrostatic discharge. This discharge is known to damage or degrade the performance of the module. The CMOS memory cartridge has a maximum lifespan of 10 years. It is possible to use the low self-discharge feature of the battery. During the installation of the memory cartridge, the battery should be turned ON by changing the rocker switch SW1 to the BAT ON position. The 1771-HMA memory cartridge has a red “system” LED which alerts the users in the case of a failure so they can enable the battery. If the “motion controller” LED does not power up (the green LED) when power is applied or when the “memory” LED turns on, the connector pin should be checked.