The ABB 07KR51 230VAC AC31 Central Processing Unit 8 Digital Inputs 6 Relay Outputs is a 40-series central processing unit of the ABB Advant Controller 31 (AC31) PLC family, confirmed by ABB’s official product documentation. It combines a CPU, 8 digital inputs (24 V DC) and 6 relay outputs in one DIN-rail basic unit, and communicates with extension I/O over the CS31 fieldbus at 187.5 kbaud .
Key Specifications:
- Brand: ABB
- Model: 07KR51
- Order Number: 1SBP260511R1001
- Type: PLC Central Processing Unit / Basic Unit
- System: Advant Controller 31 (AC31), 40-series central unit
- Digital Inputs: 8 (24 V DC)
- Relay Outputs: 6
- Supply Voltage: 230 V AC 50/60 Hz
- Fieldbus: CS31, RS-485, 187.5 kbaud, up to 31 interfaces / 500 m
- Ambient Temperature: 0°C to +55°C
- Country of Origin: France
ABB 07KR51 230VAC AC31 Central Processing Unit 8 Digital Inputs 6 Relay Outputs is the mains-powered control unit for AC31 applications: it runs the user program, reads eight 24 V DC inputs from sensors and switches six relay outputs for loads up to 2 A, all while talking to remote I/O over the CS31 bus. Because it accepts 230 V AC directly, it eliminates a separate 24 V power supply in cabinets where mains is the only available feed.
















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