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ABB 086318-002 086318-501

The ABB 086318-002 / 086318-501 is positioned as a controller memory expansion and data retention component within ABB industrial automation systems.

Unlike I/O modules that directly interface with field devices, this board works at the controller level, supporting:

• Program storage
• Configuration retention
• System parameter backup
• Runtime data preservation
• Controller reliability improvement

It is mainly used in ABB PLC/DCS control architectures where stable memory operation is essential for continuous industrial processes.

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2. Product Parameters

Parameter	Description
Manufacturer	ABB (Asea Brown Boveri)
Model	086318-002
Alternative Model	086318-501
Product Type	Memory Daughter Board / Memory PWA
Board Type	Printed Wiring Assembly (PWA)
Function	Controller memory expansion and backup storage
Application	ABB industrial control systems
Replacement Relationship	086318-002 supersedes earlier memory daughter board versions in some systems
Approx. Dimensions	208 × 120 × 15 mm
Weight	Approx. 0.13 kg
Installation	Internal controller/rack-mounted board
Operating Environment	Industrial automation environment

 

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3. Core Function

3.1 Memory Expansion

The primary function of the 086318 series is to provide additional memory capability for ABB control hardware.

It stores:

• Control application data
• Firmware-related information
• Configuration parameters
• System variables
• Historical or diagnostic information

This allows the controller to maintain critical information even during power interruptions.

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3.2 Data Retention

The board provides reliable retention of important controller information, reducing risks caused by:

• Unexpected shutdowns
• Power failures
• Controller replacement
• Maintenance operations

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3.3 Controller Performance Support

By separating memory resources from the main processor board, ABB improves:

• System flexibility
• Maintainability
• Controller lifecycle management

The memory daughterboard architecture allows easier replacement without replacing the complete controller assembly.

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4. Design Features

4.1 Modular Daughterboard Architecture

The board uses a plug-in daughterboard design:

• Installed onto the controller motherboard
• Easy replacement
• Reduced downtime during maintenance

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4.2 Industrial Reliability Design

Designed for industrial environments, the board emphasizes:

• Long-term operational stability
• Resistance to electrical interference
• Reliable memory access
• Continuous process availability

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4.3 Compact PCB Structure

The compact PCB layout provides:

• Efficient cabinet space utilization
• Low power consumption
• Easy integration into existing ABB systems

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4.4 Compatibility-Oriented Design

The 086318 family was designed for ABB legacy control platforms, allowing users to maintain existing automation systems without major hardware redesign.

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5. Hardware Composition

The ABB 086318-002 / 086318-501 typically consists of:

5.1 PCB Assembly

Main circuit board containing:

• Memory devices
• Address/control circuits
• Interface connectors
• Power conditioning components

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5.2 Memory Components

Depending on system generation, memory circuits may include:

• Battery-backed RAM (BRAM)
• Static RAM components
• Memory management circuitry

Some ABB documentation references the 086318 family as a BRAM/memory daughter PCB used with ABB control processors.

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5.3 Interface Connector

Provides communication between:

• Main controller board
• Processor subsystem
• Internal backplane

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5.4 Protection Components

Includes supporting circuits such as:

• Voltage regulation
• Signal conditioning
• Memory protection functions

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6. Application Scenarios

6.1 Power Generation

Used in:

• Turbine control systems
• Generator automation
• Auxiliary control systems

Purpose:

• Preserve control parameters
• Maintain controller configuration

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6.2 Process Industry

Applications include:

• Oil & gas
• Chemical plants
• Steel production
• Water treatment

Benefits:

• Stable process control data retention
• Reduced restart time after outages

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6.3 Manufacturing Automation

Used in:

• Production line controllers
• Industrial machinery
• Automated equipment

Provides:

• Program storage support
• Reliable machine configuration retention

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6.4 Legacy ABB Control Systems

The board is especially valuable for maintaining older ABB automation installations where controller replacement is costly or impractical.

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7. Maintenance Points

7.1 Visual Inspection

Regularly check:

• PCB contamination
• Connector oxidation
• Component damage
• Burn marks

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7.2 Memory Backup

Before replacement:

• Backup controller programs
• Save configuration files
• Record hardware settings

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7.3 Battery / Retention Check

For battery-backed memory versions:

• Monitor battery condition
• Replace aging batteries if applicable
• Avoid long-term power-off storage

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7.4 Environmental Control

Maintain:

• Stable cabinet temperature
• Low humidity
• Clean airflow
• Proper grounding

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7.5 Replacement Considerations

When replacing:

• Confirm exact ABB part number
• Verify firmware compatibility
• Check controller hardware revision
• Perform functional testing after installation

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8. Comprehensive Evaluation

The ABB 086318-002 / 086318-501 Memory Daughterboard is a specialized but important component in ABB industrial control systems.

Advantages

✔ Improves controller data reliability
✔ Supports legacy ABB system maintenance
✔ Compact modular design
✔ Reduces downtime during controller servicing
✔ Suitable for long-life industrial applications

Limitations

✘ Mainly applicable to specific ABB legacy platforms
✘ Availability may depend on surplus/repair markets
✘ Requires compatibility verification before replacement

Overall Assessment

The ABB 086318 series is a critical support component for ABB automation controllers, providing memory retention and system continuity rather than direct process control. For existing ABB installations, maintaining a reliable spare 086318-002/086318-501 board can significantly reduce downtime risk and extend the operational life of legacy control systems.