The A3PLE1-6L4R-91 is an Allen-Bradley illuminated pushbutton from the 800T/H family, configured as a 2-position momentary, extended operator, 120V red LED, with 1NO+1NC contacts.
The extended operator projects further from the panel face than a flush operator, suited for gloved-hand or thick-panel applications where reach is a factor. Wiring the 1NO+1NC contact block follows standard pushbutton practice: the NO leg closes on actuation for a start signal, the NC leg opens for a stop or interlock. The 120V red LED circuit is separate from the contact block; verify polarity if the LED is DC-rated.