Product Overview

• Part Number: 07KT97H3
• Brand: ABB
• Origin: Sweden
• Series: AC31 programmable logic controller core basic CPU unit

• FunctionServe as the central processing core of the AC31 PLC system. Execute user ladder logic, FBD and structured program; collect signals from field DI/DO, AI/AO expansion modules via CS31 bus; output control commands to valves, contactors and motors. Support data exchange with upper computer, DCS and touch screen through serial ports, realizing full automatic closed-loop control of production lines, pumps, fans and heating equipment.

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Core Features

1. Abundant storage capacity480kB user program memory + 256kB data storage memory, supporting complex multi-segment process programs and recipe data storage.
2. Multiple communication portsBuilt-in CS31 system bus for connection with remote I/O modules; dual serial COM ports (COM1/COM2) supporting Modbus RTU, serial programming and HMI connection; convenient networking with inverters, instruments and upper monitoring system.
3. Complete hardware protectionEquipped with overvoltage, overcurrent and short-circuit protection circuits; front panel LED indicators display running status, communication faults and hardware alarms for rapid troubleshooting.
4. Industrial adaptabilityPCB with conformal coating, anti-dust, anti-humidity and anti-electromagnetic interference; DIN rail mounting compatible, also supporting screw fixed installation inside cabinets.

5. Expandable configurationCan be matched with AC31 full series I/O modules, expandable to maximum 256 I/O points to meet medium-scale automation transformation demands.

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Technical Specifications

• Power Supply: DC 24V (input range 18~26VDC)
• Operating Temperature: 0℃ ~ +55℃; storage temperature: -25℃ ~ +75℃
• Protection Grade: IP20 (cabinet installation only)
• Installation: DIN rail TH35 standard mounting or screw fixing
• Weight: Around 0.8kg
• HS Code: 85389091

• Supply: Brand new original and fully tested refurbished modules available

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Compatibility

• Exclusive match with ABB AC31 series PLC system
• Compatible with all AC31 digital/analog expansion modules, remote I/O stations

• Widely matched with old water treatment, chemical, metallurgy, food processing automation equipment; direct replacement for all 07KT97 series compatible models

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Application

• Daily maintenance replacement for old AC31 PLC main controller failures
• Water plant pump group control, heating furnace temperature linkage control
• Chemical pipeline valve interlock, packaging production line logic overhaul
• Spare backup for factory legacy automation system long-term operation