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SKU: 1785-ME16

Allen-Bradley 1785-ME16 PLC-5 EEPROM Memory Module

The Allen-Bradley 1785-ME16 is a 16K Word EEPROM memory module designed for the PLC-5 series. It provides non-volatile program backup and features a hardware write-protection jumper to ensure data integrity and automatic system recovery for enhanced and Ethernet PLC-5 processors.

Product Overview

The Allen-Bradley 1785-ME16 serves as a critical data backup and storage solution for the legacy PLC-5 processor family. This Electrically Erasable Programmable Read-Only Memory (EEPROM) module provides a non-volatile environment to safeguard user programs and system configurations. By storing a master copy of the controller’s logic, the module ensures that the automation system can automatically recover and resume operations following a power loss or memory corruption event.

Technical Capabilities and Performance

  • Manufacturer: Allen-Bradley / Rockwell Automation
  • Memory Type: EEPROM (Non-volatile)
  • Storage Capacity: 16K Words
  • Series Compatibility: PLC-5 Enhanced and Ethernet Processors
  • Write Protection: Integrated physical jumper for data security
  • Operating Temperature: 0° to 60° C (32° to 140° F)
  • Shock Resistance: 15 g (Operational peak acceleration)
  • Vibration Tolerance: 1 g at 10 to 500 Hz
  • Physical Weight: 0.08 kg
  • Dimensions: 13.5 x 7.1 x 1 cm

Operational Applications

Maintenance teams install the 1785-ME16 in PLC-5 systems to eliminate the risk of extended downtime. In facilities where battery failure might result in the loss of volatile RAM, this EEPROM module acts as the definitive secondary storage. It is particularly valuable in remote or unmanned stations, such as water pumping facilities or oil pipelines, where an automatic program reload is necessary to restore the system without manual intervention from a technician.

Core Features

  • The non-volatile storage retains the control logic indefinitely without the need for battery power.
  • An onboard hardware jumper allows users to lock the memory, preventing unauthorized or accidental program modifications.
  • The module supports a wide range of processors, including the PLC-5/11, 5/20, 5/40, and high-capacity 5/80 variants.
  • Automatic load-on-boot functionality enables the PLC to transfer the EEPROM contents to RAM immediately upon power-up.
  • The ruggedized design meets industrial standards for humidity (5-95%) and vibration resistance in manufacturing environments.
  • Installation is straightforward via the dedicated memory slot located on the front or side of the PLC-5 processor housing.