ABB 07CR41 Replacement AC31 Basic Unit for ABB Control Systems

The ABB 07CR41 Replacement AC31 Basic Unit for ABB Control Systems is a central processing unit from the ABB Advant Controller 31 (AC31) PLC family, confirmed as a 40-series central unit in ABB’s AC31 documentation. It integrates a CPU with 8 digital inputs (24 V DC) and 6 relay outputs for direct control of contactor, valve and signal circuits, and can be extended with up to 6 extension units for more distributed I/O. A compact, DIN-rail-mountable PLC basic unit, it brings dependable logic control to machines and small process installations under tough site conditions.

Key Specifications:

• Brand: ABB
• Model: 07CR41 (AC31, 40-series central unit)
• Type: PLC Basic Unit / Central Processing Unit
• System: Advant Controller 31 (AC31)
• Digital Inputs: 8 (24 V DC)
• Relay Outputs: 6
• Program Memory: 17/32/34 KB per variant (sources differ)
• Extensions: Up to 6 extension units, up to ~110 binary I/O centralized (per ABB documentation)
• Mounting: 35 mm DIN rail

ABB 07CR41 Replacement AC31 Basic Unit for ABB Control Systems is the logic brain of a small automation cell: eight 24 V DC inputs read sensors and pushbuttons while six relay outputs switch loads directly, without extra interposing relays. When the application grows, extension units plug in to add I/O while the same CPU keeps running the program. A proven, economical choice for machine control and small-process applications where ABB AC31 compatibility matters.