ABB Auxiliary Contact Block, AUX-C 2 CO/2 CO/1 CO, 250V, 1SDA066438R1

This auxiliary contact Block provides additional changeover and make contacts to extend the signalling and interlock capabilities of circuit breakers in industrial electrical distributions. Designed for integration with compatible SACE Tmax XT breaker systems, it fits control panels and switchgear where auxiliary feedback or auxiliary switching is required, and operates within low-voltage control circuits.

• Two changeover contacts available for expanded signalling
• Single changeover contact option for simplified feedback
• Rated for operation up to 250V for control-circuit compatibility
• Conforms to IEC 60947-2 to meet recognised modular standards
• Configurable contact arrangements to suit retrofit needs

• Suitable for adding status feedback to SACE Tmax XT breakers
• Ideal for interlock schemes in motor-control panels
• Used with auxiliary trip and alarm circuits in switchgear
• Can be used for control-circuit switching in automation racks

It mounts to compatible breaker interfaces and provides dedicated auxiliary contacts that couple mechanically and electrically to the host breaker accessory points.

The device is available with combinations that include two changeover contacts or a single changeover contact, allowing designers to choose the number of selectable circuits and simplify Terminal wiring accordingly.

It is designed in accordance with IEC 60947-2, which specifies requirements for low-voltage switchgear and associated switching devices to ensure consistent performance in control applications.