Current : 3A Material : STAINLESS STEEL Certification : CCC,ce Switch Type : Push Button Switch Item Type : SWITCHES Brand Name : CKCTINNER Is Smart Device : no Origin : Mainland China Certification : CE Features : Self-recovery and Self-lock Type Opening Diameter : 12mm/16mm/19mm/22mm Waterproof grade : IP65 Rating Switch : 3A / 250VAC Switch Type : NO (Normally Open) ; NC ((Normally Closed Using : Car PC Machine Device Buttons Difference between auto-recovery button and auto-lock button: 1. Self-recovery button: press this button to turn on the power (light on), Release your hand, the power will appear and turn off automatically (the light goes out) 2. Self-locking button: press the power button, release your hand, and keep the button stationary (lit), Press the button again to display and turn off the power (the light goes out). 1.What does the signal "NC" and "NO" means? "A" "+": positive pole of the led "LED" " - ": negative pole of the led " NC ": Normal Close " NO ": Normal Open " C ": Common 2.How to connect? 1.Connect " NO " and " C ": The circuit is Alway open unless press the button. 2.Connect " NC " and " C ": The circuit is Alway close unless press the button. Wiring Instructions "NO": Normally open "NC": Normally close "C": Common terminal 16/19MM Wiring Diagram 1 Self-locking Type with Light: Press the Switch, the Button is Recessed, the Button Light is On, and the Equipment is Powered On; Press the Switch Again, Reset the Button, Turn off the Button Light, and Power off the Equipment. Self-reset Type with Light: Press the Switch, the Button is Recessed, the Button Light is On, and the Equipment is Powered On; Finger Release, Button Reset, Button Light Off, Equipment Power Off. Wiring Mode: the Positive Pole of the Power Supply is Connected to the Normal Opening (no) of the Switch Common Terminal (c) and the Led - Only Pin, Which is Connected to the Positive Pole of the Equipment; the Negative Pole of the Power Supply is Connected to the Other Pin of the Led and Connected to the Negative Pole of the Equipment. 16/19MM Wiring Diagram 2 Self-locking with Light: the Button Light is Always on when Powered On; Press the Switch, the Key is Recessed, and the Equipment is Powered On; Press the Switch Again, Reset the Key, and Power off the Equipment. Self-recovery with Light: Power On, Button Light On; Press the Switch to Power on the Equipment; Finger Release, Key Reset, Equipment Power Off. Wiring Mode: the Positive Pole of the Power Supply is Connected to the Common Terminal (c) of the Switch and One of the Pins of the Led Lamp is Connected to the Normal Terminal (no) of the Switch and Connected to the Positive Pole of the Equipment; the Negative Pole of the Power Supply is Connected to the Other Pin of the Led and Connected to the Negative Pole of the Equipment. 22MM Wiring Diagram 1 Self-locking Type with Light: Press the Switch, the Button is Recessed, the Button Light is On, and the Equipment is Powered On; Press the Switch