ABB 07KR51-W3.6 CPU Module for AC31 PLC Systems

Product Description
The ABB 07KR51-W3.6 is a CPU module for the Advant Controller 31 (AC31) PLC family, designed for small to medium industrial automation tasks. It provides integrated control logic execution and I/O management, including 8 digital inputs and 6 relay outputs. Moreover, the module supports local expansion and distributed I/O via the CS31 bus, enabling scalable solutions up to ~1000 I/O points. With an integrated real-time clock and non-volatile memory, the CPU ensures continuous operation and reliable program retention. Its compact, rugged design allows deployment in various industrial environments, supporting both process control and distributed automation systems.

Technical Specifications

Model Number: 07KR51-W3.6
Order Code: 1SBP260011R1001 W3.9
Manufacturer: ABB (Sweden)
Type: PLC CPU Module
Integrated I/O: 8 digital inputs (24 VDC, PNP/NPN configurable), 6 relay outputs (250 VAC/2 A)
Program Memory: ~34 KB user program memory
Data Memory: Non-volatile RAM
Communication Interfaces: RS232 (programming, ASCII, Modbus), CS31 bus (up to 31 nodes)
Expansion Capacity: Up to 6 local I/O modules (~110 digital or 36 analog I/O)
Distributed I/O Capacity: Up to ~1000 I/O points via CS31 bus
Programming Software: AC31GRAF or 907AC1131 (Windows compatible)
Real-Time Clock: Integrated
Output Current: 2 A
Output Voltage (Uout): 24 V DC
Dimensions (W × H × D): 120 × 93 × 84 mm
Weight: 0.8 kg
Operating Temperature: 0 °C to +55 °C (horizontal), 0 °C to +40 °C (vertical)
Storage Temperature: –40 °C to +75 °C
Humidity: Max 75% average, 95% occasional 
Applications: Industrial automation, process control, distributed I/O systems

FAQ

Q: How many I/O points can the 07KR51 CPU module manage?
It supports up to ~1000 distributed I/O points via CS31 bus and 6 local expansion modules.

Q: What programming software is compatible with this module?
AC31GRAF and 907AC1131 software on Windows platforms are fully supported.

Q: Does the CPU module include a real-time clock?
Yes, it has an integrated real-time clock for accurate scheduling and timestamping.

Q: Can it be used in harsh industrial environments?
Yes, the module is designed for rugged industrial conditions with a wide operating temperature range.

Q: What communication protocols does it support?
RS232, Modbus, ASCII, and CS31 bus communication are all supported for flexibility.