The Allen Bradley 1785-MR PLC-5 Memory Module is a compact, high-reliability memory cartridge designed to support PLC-5/15 and PLC-5/25 processor systems in industrial automation environments. It provides stable RAM-based program storage to ensure consistent controller operation and reliable execution of automation logic in mission-critical applications.
Engineered for legacy PLC-5 architectures, the 1785-MR is commonly used to maintain system integrity, support program retention, and enhance memory capability in existing installations. Despite being an older-generation component, it remains valuable in maintenance, repair, and spare-part strategies for long-running industrial systems.
Technical Specifications
| Specification | Details |
|---|---|
| Manufacturer | Allen Bradley |
| Model Number | 1785-MR |
| Product Family | PLC-5 |
| Module Type | Memory Module |
| Memory Type | CMOS / SRAM RAM Cartridge |
| Memory Capacity | Approx. 4K Words |
| Compatible Processors | PLC-5/15, PLC-5/25 |
| Function | Program Memory Expansion / Backup |
| Installation Method | Plug-in Cartridge (PLC-5 System) |
| System Role | Controller Memory Support |
| Operating Environment | Industrial Automation Systems |
| Lifecycle Status | Obsolete (Legacy Support Use) |
Physical Dimensions & Weight
| Mechanical Property | Specification |
|---|---|
| Dimensions (L × W × H) | Approx. 60 × 50 × 20 mm |
| Weight | Approx. 0.10 kg |
Recommended Related Models
The 1785-MR is typically used alongside PLC-5 processors and memory/communication modules in legacy Allen Bradley systems.
| Related Model | Description |
|---|---|
| 1785-L20B | PLC-5 Processor Module |
| 1785-L40B | Enhanced PLC-5 Controller |
| 1785-L60B | Advanced PLC-5 Processor |
| 1785-ME16 | EEPROM Memory Module |
| 1785-ME32 | Expanded EEPROM Memory Module |
| 1785-ME64 | High-Capacity EEPROM Module |
| 1771-ASB | Remote I/O Adapter Module |
| 1771-IFE | Analog Input Module |
| 1771-OBD | Digital Output Module |
| 1785-ENET | Ethernet Communication Module |
Common Allen Bradley PLC Ecosystem Models
Allen Bradley automation systems are widely recognized for robust industrial performance and long lifecycle support in critical control applications.
| Popular Model | Product Category |
|---|---|
| 1756-L81E | ControlLogix Controller |
| 1769-L33ER | CompactLogix Controller |
| 5069-IF8 | Compact I/O Module |
| 2711P-T10C4D8 | PanelView HMI |
| 20G11NC072JA0NNNNN | PowerFlex 755 Drive |
| 1734-AENTR | POINT I/O Adapter |
| 1606-XLS240E | Power Supply Module |
| 1756-EN2TR | Ethernet Communication Module |
| 1794-IE8 | FLEX I/O Analog Module |
| 25B-D013N114 | PowerFlex 525 Drive |
