Product Introduction

Model Explanation

• 086318: Base part number for the AC500 memory daughterboard assembly.

• -501: Hardware revision 501, signifying an enhanced version with larger memory capacity and improved component reliability compared to -002.

• Type: SRAM‑based memory expansion daughterboard.

• Series: ABB AC500 PLC system, S‑series memory modules.

Technical Parameters

• Memory Type: SRAM (non‑volatile with battery backup).

• Capacity: 16 MB (expanded from 512 KB in -002).

• Power: Supplied via PLC backplane, typical consumption ≤ 3 W.

• Dimensions: 75 mm × 30 mm × 10 mm.

• Weight: Approximately 20 g.

• Operating Temperature: -20 °C to +70 °C.

• Storage Temperature: -40 °C to +85 °C.

• Humidity: 5%–95% non‑condensing.

• Protection Class: IP20 (for indoor cabinet use).

• Compatibility: ABB AC500 PLC CPU slots.

• Hot‑Swap: Supported (insert/remove without powering down the PLC).

• Data Integrity: Integrated error correction mechanism (ECC).

Interface and Communication Configuration

• Host Interface: Direct plug‑in to the AC500 PLC CPU’s dedicated memory slot via edge connector.

• Internal Bus: High‑speed parallel bus for data exchange between CPU and SRAM.

• External Communication: No independent communication ports; data accessed through the PLC’s standard communication interfaces (Ethernet, Profibus DP, Modbus RTU).

• Diagnostics: On‑board status LED for power, access activity, and fault indication.

Core Functions

• High‑Capacity Memory Expansion: Extends AC500 PLC program and data memory to support large‑scale applications with complex control logic and extensive data logging.

• Data Retention: SRAM maintains critical data during power outages with PLC battery backup.

• Program and Recipe Storage: Stores large user programs, production recipes, and configuration data.

• High‑Speed Access: Enables fast read/write operations for real‑time control tasks and data processing.

• Hot‑Swap Support: Allows replacement or upgrade without system shutdown, maximizing operational availability.

• Enhanced Reliability: ECC mechanism ensures data integrity in harsh industrial environments.

Application Scenarios

• Process Automation: Chemical, pharmaceutical, and food & beverage lines requiring extensive recipe storage and high‑volume data logging.

• Manufacturing: Packaging, assembly, and material handling machines with large control programs and complex motion control.

• Infrastructure: Water treatment, HVAC, and building automation systems needing expanded data capacity and reliable operation.

• System Upgrades: Retrofitting existing AC500 installations to handle more complex control requirements and larger data sets.

• Legacy System Support: Serving as a high‑capacity replacement for older memory modules in long‑term deployed AC500 systems.

Usage and Maintenance Instructions

• Installation: Power down the PLC (unless hot‑swapping), insert the board into the dedicated CPU memory slot, and ensure the edge connector is fully seated.

• Environment: Operate in a clean, dry, dust‑controlled cabinet; avoid corrosive gases, excessive vibration, and extreme temperatures.

• Inspection: Periodically check the status LED and connector integrity; verify data retention after power cycles.

• Replacement: Use only ABB‑approved 086318‑501 units; ensure compatibility with the specific AC500 CPU model.

• Battery Care: Monitor the PLC’s backup battery to prevent SRAM data loss during extended power outages.

• Compatibility Note: Backward compatible with AC500 CPUs supporting S‑series memory modules; verify firmware compatibility before installation.