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The Allen Bradley 1747-M11 is a memory module designed for use within the SLC 500 programmable logic controller system. It is used to provide non-volatile program and data storage for SLC controllers, ensuring that automation programs are retained even when power is removed or during system maintenance.
This module plays a supporting role in industrial automation systems by protecting control logic and reducing downtime during controller replacement or system recovery.
The 1747-M11 is commonly used in legacy SLC 500 installations where reliable program storage and system stability are required over long operational periods.
| Item | Details |
|---|---|
| Brand | Allen Bradley |
| Product Model | 1747-M11 |
| Product Type | EEPROM Memory Module |
| Product Family | SLC 500 Series |
| Series | SLC Memory Expansion / Backup Modules |
| Main Function | Program and Data Storage |
| Memory Type | EEPROM |
| Installation Type | Plug-in module |
The SLC 500 system is a modular PLC platform designed for industrial automation applications.
It supports a flexible structure with CPU modules, I/O modules, communication modules, and memory modules integrated into a rack-based or fixed controller system.
The system is widely used in manufacturing, process industries, packaging systems, and material handling applications due to its reliability and long lifecycle.
The 1747-M11 belongs to the SLC memory module family, designed to extend or support program storage functions for compatible controllers.
| Parameter | Specification |
|---|---|
| Model | 1747-M11 |
| Product Type | EEPROM Memory Module |
| Memory Capacity | ~1K to 4K words (configuration dependent) |
| Storage Type | Non-volatile EEPROM |
| Function | Program and data table backup |
| Compatible Controllers | SLC 5/01, SLC 5/02 |
| System Compatibility | SLC 500 fixed and modular systems |
| Backup Function | Power-loss program retention |
| Data Retention | Long-term non-volatile storage |
| Programming Function | Program upload/download storage |
| Installation Method | Plug-in memory slot |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity Range | 5%–95% non-condensing |
| Shock Resistance | Industrial standard |
| Vibration Resistance | IEC industrial level |
| Dimensions | ~5.1 × 2.5 × 2.5 cm |
| Weight (kg) | ~0.10 kg |
The 1747-M11 uses EEPROM technology, which retains stored data without requiring battery power.
This ensures that PLC programs remain intact even during complete power loss.
The module provides stable backup storage for control logic and system configuration.
It allows fast recovery after system failure or controller replacement.
Designed for integration with SLC 5/01 and SLC 5/02 controllers.
It ensures seamless communication with SLC 500 fixed and modular systems.
The module features a compact plug-in structure for easy installation.
No complex configuration or setup is required for operation.
Built for industrial environments with resistance to vibration, temperature variation, and long-term operation.
Used to store automation programs and protect control logic from loss.
Ensures stable program retention in machine-based automation systems.
Supports fast recovery during equipment replacement or system failure.
Used in production machines requiring reliable control logic storage.
Common in older SLC 500 installations still operating in industrial facilities.
| Advantage | Description |
|---|---|
| Non-Volatile Memory | No battery required for data retention |
| Stable Backup Function | Prevents program loss |
| Simple Installation | Plug-in module design |
| High Compatibility | Works with SLC 5/01 and 5/02 |
| Industrial Reliability | Stable in harsh environments |
| Fast Recovery Support | Reduces downtime |
| Compact Structure | Easy integration into PLC systems |
| Long Service Life | Designed for industrial longevity |
| Model | Product Type | Main Function | Application | Dimensions | Weight (kg) |
|---|---|---|---|---|---|
| 1747-M0 | Memory Module | Basic EEPROM storage | Small PLC systems | 5 × 2.5 × 2.5 cm | 0.09 kg |
| 1747-M1 | EEPROM Module | Program backup | SLC 5/01–5/02 | 5 × 2.5 × 2.5 cm | 0.11 kg |
| 1747-M11 | EEPROM Module | Enhanced backup storage | SLC systems | 5 × 2.5 × 2.5 cm | 0.10 kg |
| 1747-M2 | EEPROM Module | Expanded memory backup | Industrial PLC systems | 5 × 2.5 × 2.5 cm | 0.11 kg |
| 1747-M13 | Flash Module | Advanced memory support | SLC 5/04 systems | 6 × 3 × 2 cm | 0.15 kg |
| Model | Product Category | Main Features | Application Area | Dimensions | Weight (kg) |
|---|---|---|---|---|---|
| 1747-L541 | CPU Module | SLC 5/04 processor | Large automation systems | 25 × 17 × 6 cm | 0.45 kg |
| 1747-L542 | CPU Module | High-performance CPU | Distributed control systems | 25 × 16.6 × 5.9 cm | 0.40 kg |
| 1747-L551 | CPU Module | Ethernet-enabled CPU | Networked automation | 25 × 16.5 × 5.6 cm | 0.42 kg |
| 1756-EN2TR | Ethernet Module | Dual Ethernet/IP ports | Industrial networking | 14 × 11 × 8 cm | 0.45 kg |
| 1769-L33ER | Compact PLC | Built-in Ethernet/IP | Machine automation | 18 × 12 × 9 cm | 0.92 kg |
The 1747-M11 functions as a memory backup module within SLC 500 systems.
It ensures that PLC programs and configuration data are safely stored and can be recovered after system shutdown or failure.
It plays a critical role in maintaining continuity in industrial automation systems.
The module is installed directly into the controller or memory slot.
It requires no programming configuration for basic operation.
Maintenance is minimal, with replacement only required in case of failure or system upgrade.
Its solid-state EEPROM design reduces maintenance needs compared to battery-based storage solutions.
The 1747-M11 is widely used in industrial environments due to its simplicity and stable memory retention capability.
It continues to be used in legacy SLC 500 systems across manufacturing plants worldwide.
Its reliability and long lifecycle make it suitable for continuous industrial operation.
The Allen Bradley 1747-M11 is an EEPROM memory module designed for SLC 500 PLC systems.
It provides stable non-volatile program storage, ensuring reliable backup and recovery of automation logic.
Its simplicity, durability, and compatibility make it a key component in legacy industrial control systems requiring dependable memory retention.