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Why did ZB4AS84430 replace ZB4AS5430

Trigger action has replaced standard action for better safety in emergency applications. 

Issue:
Difference between trigger action and non-trigger action pushbuttons

Product Line:
Harmony XB4/XB5

Environment:
US product

Cause:
What is the difference in size and actuation of trigger action pushbuttons

Resolution:
Trigger action pushbuttons are impossible to partially engage the contacts.  The trigger action causes the operator to snap over from one state to the other once engaged past a point of no return.  For safety applications and emergency off/stop applications, this is the preferred method.  In general, trigger actuated pushbuttons are 5mm longer than the non-trigger action counterparts. PDF copy of original letter sent to customer base attached.

 
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