✅ Basic Information

Full Name: 07KR51 – AC31 Basic Programmable Controller

Manufacturer: ABB (Sweden / France)

Weight: Approximately 0.5 kg

Dimensions (Width x Height x Depth): 152 x 127 x 152 mm (6" x 5" x 6")

Installation: DIN Rail

Protection: IP20

✅ Core Configuration (CPU + Integrated I/O)

Processor: 16-bit Microprocessor

User Memory: 2 KB EEPROM (Program/Data)

Digital Input DI: 8 channels, 24 VDC, 5 mA, Source/Drain Type Optional

Digital Output DO: 6 channels, Relay Contacts (NO/NC)

Contact Rating: 250 VAC / 2 A (Resistive Load)

Input Filtering: Hardware Anti-Shake, Configurable Delay

Isolation: Electrical Isolation Between Field Side and System Side

✅ Communication Interfaces

RS232: 1 Port (Programming / Host / ASCII/Modbus RTU)

RS485: 1 Port (Optional, Multi-Station Network)

Protocols: Modbus RTU, ASCII, ABB Private Protocol

✅ Electrical Specifications

Power Supply: 24 VDC (18–30 VDC)

Power Consumption: < 5 W

Current: < 200 mA @ 24 VDC

✅ Environment

Operating Temperature: 0 °C … +60 °C

Storage temperature: −40 °C … +70 °C

Certifications: CE, UL, RoHS

✅ Key Features

Integrated PLC: CPU + 8DI + 6DO (relays), no need for additional I/O modules

Compact Design: Small size, low power consumption, suitable for scenarios with limited cabinet space

Support for Modbus RTU: Can be networked with frequency converters, instruments, RTUs

LED Status Lights: Power, operation, fault, I/O status indication

Compatible Systems: ABB Advant Controller 31, Advant OCS, 800xA (as remote/local controller)

✅ Application Scenarios

Small and medium-sized equipment control, assembly lines, building automation

Process control for temperature / pressure / flow / level, etc.

Relay-level logic substitution, interlocks and alarm control

System upgrade for old systems (replacing the old AC31 controller)