Description

Product Description

The Allen-Bradley 1785-ME32 functions as a high-reliability Electrically Erasable Programmable Read-Only Memory (EEPROM) module specifically for the PLC-5 processor family. This specialized storage component provides 32K words of non-volatile memory, acting as a critical failsafe for industrial control programs. By utilizing this module, engineers ensure that essential logic, calibration tables, and device configurations remain intact even during total power loss or backplane battery failure.

Because the 1785-ME32 is user-modifiable, maintenance teams can reprogram the module multiple times to accommodate logic updates or system expansions. It effectively serves as a secondary backup, allowing the processor to automatically reload the control program into RAM upon power-up if a memory error is detected. This functionality significantly reduces system downtime in remote or mission-critical installations where manual program reloading is impractical.

Furthermore, Rockwell Automation designed this module to withstand the rigorous electromagnetic and mechanical interference common in factory environments. It offers robust ESD immunity and high-level RF protection, ensuring data integrity across a broad frequency spectrum. The module integrates directly into the processor’s expansion port, requiring minimal setup while providing a scalable solution for managing up to 3072 analog I/O points across complex remote I/O link configurations.

Technical Characteristics

• Memory Capacity: 32K Words
• Memory Type: EEPROM (Non-volatile, Electrically Erasable)
• Compatibility: Allen-Bradley PLC-5 Processor Series
• Backplane Current Load: 2.5A @ 5V DC
• I/O Capacity: Supports up to 3072 Analog I/O points
• Remote Expansion: Manages up to 32 remote I/O chassis per link
• Operating Temperature: 0°C to 60°C (32°F to 140°F)
• Shock Resistance: 30g (Operating); 50g (Non-operating)
• ESD Immunity: 6 kV (Contact); 8 kV (Air)
• RF Immunity: 30 MHz to 2700 MHz protection range