This video explains how a Ly2n type relay with 8 pins works. Where the relay has 2 common, namely Pin 5 and Pin 6, Pin 5 to Pin 1, contact NC Pin 5 to Pin 3 contact NO Pin 6 to Pin 2 contact NC Pin 6 to Pin 4 contact NO, therefore this relay has 2 NC contacts and 2 NO contacts. For how the Relay works with the LY2N typr, watch the video... #relay