Auxiliary contact block Noark 108143 1NO+1NC AX51 11

The auxiliary contact block Noark 108143 1NO+1NC AX51 11 is an add-on component designed for use with AX51 series contactors and motor starters. It provides one normally open (NO) and one normally closed (NC) contact to extend signaling and control capabilities in industrial electrical panels. The unit mounts directly onto compatible contactors to give reliable feedback and auxiliary switching functions without modifying the primary device.

Advantages

This auxiliary contact block delivers compact, space-saving auxiliary contacts engineered for straightforward mechanical mounting on matching contactors. The 1NO+1NC configuration enables flexible control logic and status indication while maintaining clear separation between switching circuits. The block is built to consistent electrical contact performance and provides a plain interface for interlocking, signaling, and automation tasks.

Suitable for

• Adding feedback contacts to motor starters and contactors
• Implementing electrical interlocks and safety logic
• Signal transmission to control relays, PLC inputs, or indicator lamps
• Small to medium industrial control panels and automation cabinets

Key specifications

• Contact configuration: one normally open (NO) and one normally closed (NC)
• Intended mounting: add-on mounting to compatible contactors in the AX51 family
• Function: auxiliary switching for signaling, interlocking and control circuits
• Design: compact block for direct attachment to main switching device

How to use

Mount the auxiliary contact block onto the matching AX51 contactor according to the contactor manufacturer’s mechanical guidance, ensuring secure engagement and correct orientation. Connect control or signal wires to the designated auxiliary terminals using appropriate ferrules or crimped connectors, observing safe wiring practices and rated conductor sizes. Use the NO and NC contacts in the control circuit as required for status feedback, interlock logic, or lamp/PLC input signals. Verify correct operation by actuating the main contactor and checking the auxiliary contact change-over behavior.

Usage recommendations

Install, wire and commission the auxiliary contact block in compliance with applicable electrical standards and local regulations. Ensure contact ratings match the control circuit requirements and perform regular inspections for secure mounting and cable connections. When integrating with automation systems, confirm compatibility with input types and consider contact protection if switching inductive loads.