NC (Normally Closed) Contact Module

Features

    Extended Electrical Durability: Engineered for superior operational longevity, delivering an electrical life of 100,000 cycles with custom scalability reaching up to 1 million cycles.

    Streamlined Screw Terminal Assembly: Features a pragmatic screw terminal wiring architecture paired with a modular plug-and-play design for seamless control panel expansion.

Advantage: Built with high-conductivity contacts and a modular, tool-free snap-on configuration. This failsafe construction ensures instantaneous and dependable circuit opening for maximum operational safety in any demanding industrial environment.

Technical Parameters

    Industry Classification: Normally Closed Auxiliary Contact / 22mm Push Button Contact Block

    Operating Environment: Temperature: -25℃ to +70℃; Humidity: 95% (at 25℃, non-condensing)

    Safety Certification: Complies with IEC60947-5-1 / GB14048.5 standards; CCC and CE certified

    Supply Readiness: Dispatched in certified anti-static industrial bulk packaging, optimized for seamless integration on automated assembly lines.

FAQ

Q1: Why would a panel designer choose a NC contact module over a NO contact module for a STOP button?

A STOP button wired through a NC contact follows the fail-safe principle — if the contact module fails, the wire breaks, or the button is physically damaged, the circuit opens and the machine stops. A NO contact wired for STOP would leave the machine running if the contact fails open. For any function where the safe state is “off,” NC is the correct contact type.

Q2: Can a NC contact module be used alongside a NO module on the same push button switch?

Yes. A 1NO1NC configuration — one normally open and one normally closed contact on the same button — is the most common arrangement in industrial control panels. The NO contact handles the activation function and the NC contact handles the interlock or safety function simultaneously with a single button press.

Q3: If I replace a NO contact module with a NC module on an existing switch, do I need to rewire the panel?

Yes. Swapping contact type changes the circuit behavior at rest — what was previously an open circuit becomes a closed one. The wiring itself may physically fit, but the circuit logic will be reversed. Confirm with your wiring diagram before swapping contact modules in a live panel.