Product Overview

• Part Number: 086329-003, alias ECS BOARD
• Brand: ABB, Origin: Switzerland
• Matching System: ABB AC31 classic PLC series, perfectly paired with 07KT97H3, 07KT98 CPUs and AC31 I/O modules including 086349-002 DO board
• Type: PLC memory & logic auxiliary control circuit board

• FunctionActs as extended program and data storage carrier for AC31 PLC CPU. Stores ladder diagrams, FBD user programs, process recipe parameters, alarm logs and equipment operation records. Realizes data caching during program operation; equipped with backup lithium battery to retain all stored data after complete power failure, avoiding repeated program downloading and parameter reset. Transmits data interaction with CPU via CS31 bus to ensure stable execution of automatic control logic for pumps, valves and conveyor lines.

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Core Features

• Built-in multiple high-capacity memory chips for large program and parameter storage
• External replaceable lithium backup battery prevents data loss during power outage
• PCB conformal coating, dust-proof, moisture-proof, anti-oil mist and anti-electromagnetic interference, adapts to chemical, metallurgy and humid workshop environments
• Standard rack plug-in structure, backplane bus connection, easy disassembly and maintenance without rewiring
• Hardware self-check circuit; LED indicators display power status, communication state and battery low voltage alarm for quick troubleshooting
• Supports long-term offline data preservation, battery low voltage reminder to remind regular replacement

• Fully matched AC31 bus communication protocol with good compatibility with all AC31 rack hardware

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Technical Specifications

• Working Voltage: DC 24V
• Operating Temperature: 0℃ ~ +60℃
• Storage Temperature: -40℃ ~ +85℃
• Humidity Range: 5%~95% non-condensing
• Net Weight: 0.8kg
• Dimension: 254mm × 127mm × 152mm
• Protection Grade: IP20 (cabinet internal installation only)
• HS Code: 85389091

• Supply: Brand new old stock and fully tested refurbished boards available

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Compatibility

• Universal for all ABB AC31 series CPUs (07KT97, 07KT97H3, 07KT98 etc.)
• Matches all AC31 DI/DO/AI/AO expansion modules including 086349-002 digital output module
• Widely applied in old water treatment plants, heating furnaces, chemical pipelines, packaging machinery automation cabinets

• Direct one-to-one interchange for all batches of 086329-003

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Application

• Maintenance replacement for AC31 PLC frequent program loss, parameter random reset caused by aging memory board or dead backup battery
• Fault repair of PLC communication instability, program running abnormality and random halt
• Renovation upgrade of old factory AC31 automation cabinets
• Long-term spare backup for legacy AC31 control systems to guarantee continuous production