How to Choose a Switch or Pushbutton

UNDERSTAND THE ENTIRE SYSTEM

How does the switch or push button need to operate? Switch contacts are either normally open (N/O), commonly used with Fail Secure locking devices, or normally closed (N/C), typically used with Fail Safe locks. With N/O contacts, there is no power applied until the switch is activated by pushing the button; then the circuit is completed and the lock is released. With N/C contacts, there is constant power being applied. When the switch is activated by pushing the button, the circuit is broken, and the lock is released.

Alarm Controls push buttons feature N/O and N/C contact options

MULTI-FUNCTION OPERATION

Does the switch have to perform multiple functions beyond just lock control such as activation of an access control system’s Request to Exit (REX) input? Does the switch need to be illuminated or are there auxiliary LED’s on the plate that need to be activated?  Should the switch include a timer circuit and does that circuit require power to operate? With options like single pole/double throw (SPDT), double pole/double throw (DPDT), momentary or alternate action switches, you need to look at "the big picture" of the entire access control system, including desired operation and number of inputs, components, accessories needed. 

Alarm Controls offers SPDT & DPDT switch options

DETERMINE ENVIRONMENTAL FACTORS

Will the switch or push button be installed indoors or outdoors? Understand the environmental conditions of the application,  including the potential for dust and debris, rain or other fluids the switch will be subjected to, and operating temperature requirements.

Alarm Controls offers a variety of weatherproof solutions

KNOW WHICH CODES & LISTINGS APPLY

Do you know which building codes and standards are adopted in your area? Just like other access control hardware, switches and push buttons may need to follow the requirements of state and local jurisdictions based on International Building Codes (IBC) and the National Fire Protection Association (NFPA).

ICC & NFPA codes can be accessed online for free!

IDENTIFY HOW.. AND HOW OFTEN IT WILL BE USED

Will the switch or push button be used once a day or 1,000 times a day? Keep in mind the total cost of ownership: it’s not only the cost of the button that you’re paying for, but also the assurance that the button will continue to operate without issue for a long time. Additionally, UL 294 listings help establish a level of quality desired by end users, architects, and specifiers, even if UL listing is not required for a particular application by code.

Alarm Controls' wall plates are durable stainless steel