Product Introduction

Model Explanation

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

• -002: Hardware revision 2, denoting the second iteration of the PCB layout and component configuration.

• Type: SRAM‑based memory expansion daughterboard.

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

Technical Parameters

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

• Capacity: 512 KB.

• Power: Supplied via PLC backplane, typical consumption ≤ 5 W.

• Dimensions: 75 mm × 30 mm × 10 mm.

• Weight: Approximately 20 g.

• Operating Temperature: -20 °C to +60 °C.

• Storage Temperature: -40 °C to +70 °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).

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 and access activity.

Core Functions

• Memory Expansion: Extends AC500 PLC program and data memory to support larger applications.

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

• Program Storage: Stores complex control logic, user programs, and configuration data.

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

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

Application Scenarios

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

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

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

• System Upgrades: Retrofitting existing AC500 installations to handle more complex control requirements.

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 and excessive vibration.

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

• Replacement: Use only ABB‑approved 086318‑002 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.

• Discontinuation: While not officially discontinued, it is considered a legacy component; consult ABB for modern memory module alternatives for new projects.