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0-54339-39

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0-54339-39
May 27, 2026

0-54339-39

0-54339-39（Reliance Electric / ABB） Product Overview 0-54339-39 is a specialized high-density memory board (non-standard revision) for Reliance Electric AutoMax/MaxPak drives and Automate 31 PLC racks. Unlike standard revisions (-1/-10/-14/-17) with 16 KB SRAM, the -39 variant provides 64 KB battery-backed SRAM, designed for larger user programs and complex automation tasks. It is a rare, late-production OEM part, now discontinued and only available as NOS, refurbished, or used.

Description

Model Definition

  • 0-54339: Basic memory board family

  • -39: Special high-density revision (64 KB, non-standard)

  • Status: Discontinued OEM; extremely rare in stock

  • Cross-References: Standard revisions (-1/-10/-14/-17, 16 KB); no direct equivalent, closest alternative is 57C423 (128 KB)

Technical Specifications

  • Power: 5 VDC from backplane, ~8 W (higher than 16 KB models)

  • Form Factor: 3U PCB (248 × 171 × 25 mm), same as standard revisions

  • Weight: ~0.7 kg

  • Operating Temp: 0 °C to +55 °C

  • Memory: 64 KB SRAM (volatile, battery-backed)

  • Battery: 3.6 V lithium (data retention ~5 years, same as standard)

  • Components: 80+ ICs (higher density), resistor arrays, capacitors

  • Diagnostics: Dual LED (power/memory status); enhanced test points

Interfaces & Communication

  • Backplane: 3U edge connector (compatible with all AutoMax/Automate 31 racks)

  • Memory Bus: 32-bit parallel interface (vs 16-bit on standard revisions)

  • Battery Connector: Onboard socket for backup battery

  • No External Ports: All I/O via backplane

Key Features

  1. 64 KB Battery-Backed SRAM: 4× the memory of standard revisions, supports larger programs

  2. High-Density Hardware: 32-bit bus, more ICs, improved thermal design

  3. Backward Compatible: Fits all Automate 31 CPUs and backplanes (same form factor)

  4. Industrial Durability: Built for harsh environments (steel, paper, mining)

  5. Legacy Upgrade: Ideal for retrofitting older systems needing more memory

Application

  • PLC Systems: Automate 31 PLC racks (high-density primary memory)

  • Drive Systems: AutoMax/MaxPak AC/DC drives (large parameter sets, complex control)

  • Industries: Heavy machinery, process control, manufacturing lines

  • Use Cases: System upgrades, legacy modernization, large program storage

Compatibility

  • Compatible Systems: AutoMax/MaxPak Drives, Automate 31 PLC

  • Compatible CPUs: 0-53107, 57C430, 57C431, 57C435

  • Backplane: 3U slot in standard Reliance rack

  • Note: Software must support 64 KB memory (some older firmware may not)

Critical Notes

  • Rarity: 0-54339-39 is far less common than -1/-10/-14/-17; sourcing is difficult

  • Replacement: If -39 is unavailable, use 57C423 (128 KB) as a higher-capacity alternative

  • Software Check: Verify PLC/drive firmware supports 64 KB memory before installation


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