Overview
The Allen-Bradley 1785-MR is a CMOS RAM storage module designed for PLC-5 series systems. It provides volatile memory support for data handling, program execution buffering, and temporary storage of critical control information within industrial automation applications.
General Information
Part Number: 1785-MR
Manufacturer: Allen-Bradley
Country of Origin: United States
Type: CMOS RAM Storage Module
Series Compatibility: PLC-5 systems
Function: Temporary data storage and program execution support
Installation: Plug-in module for PLC processor memory slot
Memory Type: CMOS RAM (volatile memory)
Backup Requirement: Battery-backed operation required for data retention
Power Specifications
Operating Power: Supplied via PLC processor backplane
Power Consumption: Low-power CMOS design
Backup Power: Battery-supported memory retention required
Data Retention: Volatile memory (data lost without backup power)
Interface Power: Provided through controller memory interface
Communication & Interface
Interface Type: PLC memory slot interface
Data Access: Direct processor read/write access
System Role: Temporary storage for runtime data and program operations
Compatibility: PLC-5 processor memory expansion support
Diagnostics: Memory and battery status monitored via system diagnostics
Environmental
Operating Temperature: Industrial control cabinet environment
Humidity: Up to 95% RH, non-condensing
Vibration Resistance: Suitable for PLC rack-mounted industrial systems
Storage Conditions: Anti-static handling recommended
Dimensions & Weight
Dimensions (L × W × H): 100 × 30 × 85 mm
Weight: 0.15 kg
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