Relay Module Series Relay digits: 02-2 03-3 Bit Bit Bit ...... 32-32 N-NPN common cathode P-PNP common anode common anode common cathode D- DT- external power supply current: D DC 12V DC DC12- DC24- DC 24V DC48- AC DC 48V A A220- AC 110V AC 220V A110- contact structure: 10-1NO / 1NC 20-2NO / 2NC 11-1NO (NC) 12-SSR (solid state relay R- RC-D - F- fuse Z- diode varistors Note: NC normally open, NO normally closed, relays KA, the customary law cases D: LIM-1610-N-DC24V-D, said: Relay 16 digits bit, Contact Type: A normally open a normally closed, NPN common cathode input diode current DC 24V optional relay module relay module absorption principle: Power Relay Module Relay Module bright, IN input high and relay (relays will hear the sound) lights. The light bulb is connected to 220V control circuit is lit. order to achieve low-voltage (5V, 9V, 12V, 24V) to control the high-voltage power-on and off through the relay module. Relay Module a group of normally open (OFF and COM) a group of normally open (ON and COM) switching state the contrary, normally open relay action when it is not broken, and the normally closed is turned on after the relay, normally open connected to the normally closed off.