A classic switch has one input and one output. It can be NO (normally open) or NC (normally closed). A NC/NO switch has one input and two outputs and consequently 2 possible actions.

photo describing how NC/NO works

ONE SINGLE SWITCH FOR TWO OPERATIONS

A HIGH SAFETY LEVEL

photo of a man holding a switch

DIFFERENT APPLICATIONS OF NC/NO PUSH BUTTONS

NC/NO buttons are essential in various devices for safety and operational efficiency. NC buttons ensure machines stop or remain inactive when triggered (e.g., emergency stops, safety interlocks). NO buttons allow operations to start or continue when pressed (e.g., machine start buttons, elevator call buttons). Their correct application is crucial for ensuring device safety and functionality across industries. 

APEM offers a wide range of touch buttons and touch switches with NC/NO functionality:

Photo of the APEM Multimec 5G series
Multimec™ 5G for high performance tactile switches   
photo of the APEM Multimec 5E series
Multimec™ 5E only available in high temperature material, NO or NCNO functions.  
Photo of the APEM WP series
WP large pushbutton switch for military application and harsh environments 
Photo of the APEM AV 30 mm series
AV 30 mm NC/NO security pushbuttons  switches with illuminated ring, easy to operate  
photo of the APEM AV 19-22 mm series
AV 19-22 mm robust and durable switches with illuminated ring and momentary NC/NO function 
photo of the APEM AV 19 series
AV – 19 – NC-NO – not illuminated  

NO/NC MOMENTARY PUSH BUTTON: DYNAMIC CONTROL AND EFFICIENCY

An NC/NO momentary push button combines Normally Closed (NC) and Normally Open (NO) functions in one device, reverting to its original state after release. It controls two circuits: it conducts electricity when unpressed (NC) and interrupts the flow when pressed (NO). These buttons are perfect for applications that need fast response times, like in industrial machinery and safety systems. They provide precise control, strong performance, and improved safety features. 

Find more about the NO/NC momentary push button switch 

LATCHING NC/NO PUSH BUTTONS: MAINTAINED FUNCTIONALITY ACROSS APPLICATIONS

Some push buttons stay in place until switched again, allowing continuous use without holding them down. The “set and forget” feature is useful when a consistent state is necessary. This feature can be helpful in lighting controls, security systems, and equipment with a steady output. 

Latching NC/NO push buttons differ from momentary types as they do not revert to their initial state upon release. Instead of changing constantly, they stay in one state when activated. This feature simplifies operations and enhances safety by preventing accidental changes in critical settings. Latching NC/NO push buttons are versatile and ideal for many different uses. They are reliable and easy to use, making them perfect for situations where continuous control is needed. 

Get in touch with an APEM expert to find the best pushbutton for your needs. You can also chat with us to learn how NC/NO switches can enhance your setups and functionality. 

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