Description

The ABB MCB-01B is a modular contact block providing one normally closed (N.C.) contact for use with ABB’s M2 series modular operator components, representing the B-variant of the MCB-01 with specific dimensional or fixing characteristics suited to certain actuator types within the M2 range. Like the standard MCB-01, it attaches directly to the rear of compatible ABB M2 operator actuators and provides the electrical switching function for N.C. contact applications in control panels and machine operator interfaces. It is rated to IEC 60947-5-1 for reliable use in industrial control circuits.

The MCB-01B features screw terminal connections for secure wiring and is designed for use in control circuits classified under IEC 60947-5-1 utilisation categories AC-15 and DC-13. Its modular construction allows it to be combined with other contact block modules to create multi-contact assemblies on a single operator actuator, providing cost-effective and space-efficient contact expansion within the constraints of the operator component housing. The N.C. contact output is suitable for stop commands, safety interlocks, and fault indication signalling.

This contact block is used by panel builders, machine builders, and electrical installers as a core building block in ABB’s M2 operator component system, enabling the assembly of complete, functional operator devices from modular components. The MCB-01B is fully compatible with applicable ABB M2 actuator variants and is widely used in industrial control panel construction, machine operator interface design, motor control panel assembly, and process plant local control station equipment where reliable N.C. contact switching is a control circuit requirement.