Front auxiliary contacts for contactors 1xNO 1xNC AU-2M 1a1b AU-2M 1A1B

Construction and compatibility

The device has been specifically designed for front-mounting on LS series GMC and GMD contactors. The terminals are implemented in the form of robust screw clamps, which ensure a secure connection for wires of various cross-sections. This type of solution eliminates the need for additional intermediate elements or adapters.

The compact design allows for installation in limited spaces within switchboards and control cabinets. The contacts are made of materials resistant to electrical wear, which translates into long-term and reliable operation in industrial conditions.

Practical application

AU-2M 1A1B auxiliary contacts are a practical addition to LS contactors, enabling the expansion of the functionality of basic controlling devices. The combination of one normally open (NO) contact and one normally closed (NC) contact allows for the implementation of various signaling and control functions in automation installations.

The NO (normally open) contact is ideal for use in status signaling circuits—it activates when the contactor is active. On the other hand, the NC (normally closed) contact can be used to monitor the de-energized state or as a safety interlocking element. This combination enables the creation of simple control logic circuits without the need for additional relays.

The solution finds application in building automation, lighting control, ventilation systems, and small industrial installations. It is particularly useful where feedback on the operating status of the main device is required.

Installation and operation

Installation is carried out by sliding the module into the dedicated slot on the front of the contactor and mechanically locking it. The screw terminals allow for wire connection without the use of specialized tools. Only proper tightening of the pressure screws with a flat or socket wrench is required.

The module maintains its electrical parameters across a wide range of operating temperatures typical for electrical switchboards. The design ensures connection stability even in the presence of mechanical vibrations during the operation of the main device.

Performance parameters and safety

Each of the contacts can operate at loads characteristic of signaling and low-power control applications. The module maintains full functionality through thousands of switching cycles typical for building automation applications. Insulation between the contacts and the housing ensures safe operation in single-phase installations.

The module dimensions are optimized for dense component packing in modular switchboards, allowing for maximum utilization of the available mounting space.