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- MicroLogix 1100 Memory Module
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Product Overview
The Allen-Bradley 1763-MM1 MicroLogix 1100 Memory Module is a removable EEPROM memory accessory designed for use with Allen-Bradley MicroLogix 1100 programmable logic controllers. Manufactured by Rockwell Automation, this module provides an additional storage medium for backing up controller programs and data and transferring application programs between compatible controllers.
In industrial automation systems, protecting PLC programs is essential for maintaining equipment availability and simplifying maintenance. Control programs contain the logic that coordinates motors, sensors, actuators, alarms, and production sequences. Losing access to the correct program can make troubleshooting and controller replacement more difficult.
The 1763-MM1 provides 128 KB of nonvolatile EEPROM storage. It allows users to keep a separate copy of program and data information rather than relying exclusively on the memory installed inside the controller. Since EEPROM retains stored information without continuous electrical power, the module can be stored separately as part of an equipment backup strategy.
One important distinction is that the 1763-MM1 is an accessory memory module, not a controller memory expansion. It does not increase the MicroLogix 1100 controller’s available internal memory. Instead, it provides an additional removable location for storing and transporting supported program and data information.
The module is designed specifically for the MicroLogix 1100 controller family. It should not be assumed to work with other MicroLogix controllers or unrelated Allen-Bradley PLC platforms simply because they use similar memory accessories.
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Allen-Bradley |
| Manufacturer | Rockwell Automation |
| Model | 1763-MM1 |
| Product Series | MicroLogix 1100 |
| Product Type | Removable Memory Module |
| Memory Capacity | 128 KB |
| Memory Technology | EEPROM |
| Storage Characteristic | Nonvolatile |
| Primary Function | User program and data backup |
| Additional Function | Program transfer between compatible controllers |
| Compatible Controller | MicroLogix 1100 |
| Installation | Dedicated memory module port |
| Operating Temperature | -20 to 60 °C |
| Dimensions Provided | 65 × 26 × 40 mm |
| Weight Provided | 0.15 kg |
| Product Lifecycle | Discontinued |
| Discontinuation Date | April 30, 2022 |
Note: Dimensions and weight are the supplied listing values. Confirm the physical product and packaging before using them for shipping or installation planning.
Function and Working Principle
The 1763-MM1 provides removable nonvolatile storage for supported MicroLogix 1100 controller information. Its main purpose is to help users preserve and transfer application data.
1. User Program Backup
A PLC program defines how an automated machine or process operates. It may contain logic for motor sequencing, input monitoring, output control, alarms, timers, counters, and interlocks.
The 1763-MM1 provides a separate storage location for backing up supported user program information. This can be useful when maintaining equipment that must retain its original control logic over an extended service life.
Keeping a separate program copy can reduce the time needed to restore an application after certain maintenance or controller replacement events.
2. Data Backup
In addition to user programs, the memory module supports backup of controller data. Depending on the application and the supported memory-module operations, this can help preserve relevant operating information for later restoration.
For industrial equipment, maintaining a reliable backup is especially important when controller settings and application data have been developed specifically for a machine.
Users should verify the contents of the stored backup and follow the controller’s instructions when performing backup or restoration operations.
3. Program Transfer Between Controllers
The 1763-MM1 can be used to transport supported programs between compatible MicroLogix 1100 controllers.
This is useful when replacing a controller or preparing another unit with the same application logic. Instead of rebuilding the program from the beginning, maintenance personnel can use a prepared memory-module backup as part of the transfer process.
Before transferring a program, verify the destination controller model, firmware compatibility, I/O configuration, and application requirements. A stored program should not be assumed to be suitable for every MicroLogix 1100 installation.
4. Nonvolatile EEPROM Storage
EEPROM is a type of nonvolatile memory that retains stored information without continuous power. This makes the 1763-MM1 suitable for keeping a separate copy of supported controller information.
Unlike temporary memory that depends on an active power supply, the contents of properly stored EEPROM memory are retained when the module is disconnected from the controller.
The module should still be handled and stored according to the manufacturer’s instructions to avoid physical damage or electrostatic discharge.
5. Controller Memory Separation
The 1763-MM1 provides additional backup storage, but it does not increase the controller’s internal program or data memory capacity.
This distinction is important when planning a MicroLogix 1100 application. The module should be treated as a backup and transfer accessory rather than a way to expand the controller’s operating memory.
Role in Industrial Control Systems
The 1763-MM1 supports the maintenance and lifecycle management of MicroLogix 1100-based automation systems. Although it does not directly control field devices, it can help preserve the software information required for machine operation.
PLC Program Protection
A PLC program may represent significant engineering work, including machine sequences, process logic, alarm handling, and equipment interlocks. Maintaining a separate backup helps protect this work against accidental loss or difficulties during maintenance.
The 1763-MM1 provides a removable storage option for supported controller information, allowing maintenance teams to maintain a separate copy of important application data.
Controller Replacement
When a MicroLogix 1100 controller requires replacement, restoring the correct application program is a key part of returning the equipment to service.
A prepared memory-module backup can support program transfer to a compatible controller. The maintenance team must still verify the controller configuration, connected I/O, firmware, and operating conditions before restarting the machine.
Maintenance Planning
The module can be included in a maintenance inventory for equipment that relies on MicroLogix 1100 controllers. Keeping a verified backup with the machine’s documentation can make future troubleshooting and restoration more organized.
Production Continuity
A separate program backup can reduce dependence on reconstructing application logic during an equipment failure. It does not guarantee uninterrupted production, but it provides an additional recovery resource for maintenance personnel.
Industrial Applications
The 1763-MM1 is used in installations built around the MicroLogix 1100 PLC. Its applications are related primarily to program backup, data preservation, and controller maintenance.
1. Packaging Machinery
Packaging machines often use PLC logic to coordinate conveyors, product sensors, filling operations, sealing mechanisms, and counting functions.
A memory-module backup can help preserve the supported application program used by the MicroLogix 1100 controller. This can be useful when maintaining machines with established operating sequences.
2. Conveyor Control Systems
Small conveyor systems may use MicroLogix 1100 controllers to coordinate motors, photoelectric sensors, limit switches, and transfer points.
Keeping a separate copy of the controller program helps maintenance personnel prepare for controller replacement or program restoration.
3. Pump and Auxiliary Equipment
Industrial pump systems may use PLC logic for start-stop sequences, level monitoring, pressure-related interlocks, and alarm handling.
The 1763-MM1 can support backup of the controller information associated with these functions, helping preserve the application during maintenance activities.
4. Material Handling Equipment
Material-handling systems often rely on PLC programs to coordinate motors, actuators, sensors, and safety-related machine interlocks.
A removable program backup can be useful when maintaining older installations where the original application logic must be preserved.
5. Small Manufacturing Machines
Compact manufacturing equipment may use MicroLogix 1100 controllers for machine sequencing, process timing, and basic automation.
The 1763-MM1 provides a convenient storage accessory for maintaining a separate copy of supported program and data information.
6. Legacy Automation Installations
Many industrial facilities continue to operate equipment built around established PLC platforms. For these installations, preserving the original application program can be important when replacement hardware is difficult to source.
The 1763-MM1 can form part of a legacy-controller backup strategy, provided the module and controller are compatible and the stored information has been verified.
Installation and System Integration
The 1763-MM1 is designed for the dedicated memory-module connection on a MicroLogix 1100 controller. Correct handling and use are important for protecting stored program information.
1. Verify Controller Compatibility
Before installation, confirm that the controller is an Allen-Bradley MicroLogix 1100 from the 1763 family.
The 1763-MM1 is the specified memory module for this controller family. Do not assume that it is interchangeable with memory modules designed for other PLC platforms.
2. Locate the Memory Module Port
The MicroLogix 1100 controller has a dedicated memory-module port. The controller is supplied with a port cover in place when the memory module is not installed.
Follow the controller user manual when removing the cover and installing the module. Do not force the connector or attempt to insert the module in an incorrect orientation.
3. Follow the Backup Procedure
Use the controller’s supported memory-module functions to perform the required backup or transfer operation.
Before relying on a backup, verify that the intended program and data have been stored correctly. A module that has not been properly programmed should not be treated as a verified recovery copy.
4. Handle the Module Carefully
EEPROM storage is nonvolatile, but the module remains an electronic component that can be damaged by physical impact, contamination, or electrostatic discharge.
Use appropriate electrostatic precautions when handling the module. Keep its connector clean and protect it from moisture and conductive debris.
5. Verify Data Before Restoration
Before using the module to restore a controller, confirm that the stored program is the correct version for the target machine.
Check the controller model, I/O configuration, firmware requirements, and application settings. After transferring the program, inspect the controller status and verify machine operation before returning the equipment to production.
Compatible System Components
The 1763-MM1 is part of a MicroLogix 1100 controller installation. The following components may be relevant to a typical system using this memory accessory.
| Component | Function | Compatibility Considerations |
|---|---|---|
| MicroLogix 1100 PLC | Executes the machine-control program | The 1763-MM1 is designed for this controller family |
| 1763-MM1 Memory Module | Stores supported program and data backups | Dedicated memory accessory for MicroLogix 1100 |
| 1762 Expansion I/O Modules | Extend controller input and output capabilities | Select according to controller specifications and system loading |
| 24 V DC Power Supply | Provides power for compatible control circuits | Match voltage, current capacity, and grounding requirements |
| HMI Panel | Provides operator monitoring and control | Configure communication and data exchange with the PLC |
| Ethernet Network | Supports communication with compatible devices | Verify network configuration and controller capabilities |
| RS-232 / RS-485 Devices | Support serial communication applications | Confirm port configuration and communication protocol |
| Programming Software | Used to create and maintain controller programs | Confirm software and project compatibility with the installed controller |
The 1763-MM1 is an accessory rather than a field I/O module. It does not replace the PLC, power supply, communication interface, or expansion I/O equipment.
Alternative Models and Replacement Considerations
The 1763-MM1 is a dedicated MicroLogix 1100 memory accessory. There is no reason to assume that a memory module from another PLC family can serve as a direct substitute.
| Alternative or Related Option | Consideration |
|---|---|
| Another Allen-Bradley 1763-MM1 | The direct like-for-like option for a compatible MicroLogix 1100 controller |
| MicroLogix 1100 program backup using programming software | An alternative backup approach, depending on the available software, connection, and project files |
| MicroLogix 1400 controller platform | A different controller family; its memory and backup arrangements are not interchangeable by default |
| Micro800 controller platform | A possible modernization direction for selected applications, requiring program redevelopment and system evaluation |
| Current-generation PLC platform | May be considered for a broader control-system upgrade rather than a simple memory-module replacement |
Before selecting an alternative, compare:
- PLC model and controller family.
- Memory-module compatibility.
- Program and data backup requirements.
- Firmware and software versions.
- Communication interfaces.
- I/O configuration and addressing.
- Machine operating sequence.
- Restoration and commissioning procedures.
A different PLC platform may require program conversion or redevelopment, hardware changes, and complete system testing. It should not be treated as a direct replacement for the 1763-MM1.
Key Advantages
128 KB EEPROM Capacity
The module provides 128 KB of nonvolatile storage for supported MicroLogix 1100 backup and transfer functions.
Removable Storage
Its removable design allows supported program information to be stored separately from the controller and transported between compatible controllers.
Program Backup
The module provides an additional way to preserve user program information, supporting maintenance and recovery planning.
Data Backup Support
It can store supported controller data as part of a separate backup, helping maintenance teams preserve relevant application information.
Controller-to-Controller Program Transfer
The module can be used to transport programs between compatible MicroLogix 1100 controllers, which may simplify certain replacement and maintenance tasks.
Dedicated MicroLogix 1100 Compatibility
The 1763-MM1 is designed for the MicroLogix 1100 platform and its dedicated memory-module interface.
Nonvolatile Data Retention
EEPROM technology retains stored information without continuous power, making the module suitable for separate storage when handled correctly.
Technical FAQs
1. What is the Allen-Bradley 1763-MM1 used for?
The 1763-MM1 is a removable memory accessory for MicroLogix 1100 controllers. It provides additional storage for supported user program and data backups and can be used to transfer programs between compatible controllers.
2. How much memory does the 1763-MM1 provide?
It provides 128 KB of EEPROM memory.
3. Which PLC is compatible with this module?
The 1763-MM1 is designed for the Allen-Bradley MicroLogix 1100 controller family, identified by catalog family 1763.
4. Does the 1763-MM1 increase the PLC’s internal memory?
No. It provides separate removable backup storage. It does not increase the available internal memory of the MicroLogix 1100 controller.
5. Can the module retain data when disconnected from the PLC?
Yes. The module uses nonvolatile EEPROM memory, which retains stored information without continuous electrical power.
6. Can it transfer programs between controllers?
Yes. It can be used to transport supported application programs between compatible MicroLogix 1100 controllers. The destination controller and stored program should be checked before transfer.
7. Is the 1763-MM1 still manufactured?
Rockwell Automation lists the module as discontinued, effective April 30, 2022. Availability may depend on remaining inventory, surplus stock, and specialist automation suppliers.
8. Can I use another MicroLogix memory module instead?
Do not assume compatibility. The 1763-MM1 is the specified memory module for MicroLogix 1100 controllers. Check the controller manual and exact catalog number before using another accessory.
9. What should I check before purchasing a replacement?
Confirm the complete 1763-MM1 catalog number, physical condition, connector condition, and whether the module is new, used, or refurbished. If the stored program is important, verify the backup contents and its compatibility with the target controller.
10. Does the memory module replace a complete PLC backup strategy?
No. It is one backup option for supported MicroLogix 1100 program and data information. Maintaining separate project files, documentation, version records, and verified recovery procedures remains important.
Procurement and Maintenance Recommendations
The 1763-MM1 is a discontinued accessory, so buyers should confirm its exact catalog number and condition before placing an order. A similar-looking memory module from another Allen-Bradley controller family should not be assumed to be compatible.
For used or surplus units, request clear photographs of the label and connector. Confirm whether the module is supplied blank or contains previously stored information. If the module is intended for an existing machine, verify that its contents are appropriate for the target controller and application.
For maintenance purposes, keep a verified copy of the PLC program in a separate engineering backup location as well as on the memory module. Record the project version, controller model, firmware information, and date of the latest backup.
Before restoring a controller, verify the program and data, check the connected I/O configuration, and test the machine’s operating sequence. This helps reduce the risk of loading an outdated or incompatible application.
Conclusion
The Allen-Bradley 1763-MM1 MicroLogix 1100 Memory Module is a 128 KB EEPROM accessory designed to provide removable backup storage and program-transfer capability for MicroLogix 1100 controllers. It supports the preservation of user programs and data and can help maintenance teams prepare for controller replacement or application restoration.
The module does not increase the controller’s internal memory capacity and is not a universal memory accessory for other PLC families. Since Rockwell Automation has discontinued the product, accurate catalog identification and compatibility verification are important when sourcing this component for legacy automation systems.