Siemens Auxiliary Contact Block 1NO/1NC

The Siemens auxiliary contact block (also called an auxiliary contact or aux contact module) adds extra switching contacts to a Siemens SIRIUS contactor. Each block provides one normally open (1NO) and one normally closed (1NC) contact. These contacts are used for control circuit functions such as status feedback, interlocking, and signaling in industrial motor control and electrical systems.

Key Features:

• 1NO/1NC contact configuration for flexible control and signaling circuits
• Snaps onto the contactor as an add-on module, so no rewiring of the main contactor is needed
• Available in different mounting styles within the product line
• Designed for use with Siemens SIRIUS 3RH control relays and 3RT contactors
• Industrial-grade construction from Siemens Industrial Controls

Siemens is a long-established name in industrial automation and electrical controls. Adding an auxiliary contact block lets you expand a contactor's control functions without replacing the contactor itself.