Schneider Electric (Square D) LADN04 4N/C Auxiliary Contact Block TeSys

The Schneider Electric (Square D) LADN04 8-Pole Auxiliary Contact Block TESYS 690 VAC 10 Amp is a control circuit that provides four normally closed auxiliary contacts for monitoring and switching electrical control operation. When the associated contactor changes state, the auxiliary contacts respond simultaneously to open or close connected control circuits, enabling coordinated control and status feedback. Additional points to support accurate control sequencing, simplify circuit integration, and dependable operation of connected control equipment in HVAC applications. The contact block is attached directly to the front of a compatible unit to extend its control capabilities without modifying the main power circuit.