How do I connect this relay?

Hi all, This is probably a frequently asked question, but I don't know too much about electronics and I can't seem to find any info on this particular relay module. The one in question is a single relay module from DFRobot. Connecting to the Arduino is no problem, it just has 3 pins :- 5v VCC, GND & IO. I don't understand how to connect an appliance to it, I.E- A 240v 10A lamp with the regular active, neutral and earth wires. The relay module has a 4 pole screw connector marked as this :- IN, NC, OUT2, OUT1. Do I connect both active and neutral to this or just the active wire? I understand that NC probably means normally closed, but I'm not very clued up on the concept of it. I guess the earth wire will just bypass the relay, does the same apply for the neutral wire? Please help, This should be an easy one for the experts, I'm good at building things but not at this sort of thing, but I'll eventually learn.

index[1].php_title=Relay_Module_%28Arduino_Compatible%29_%28SKU__DFR0017%29 (19.5 KB)

The data sheet seems to ope (for me) as raw HTML code. Not useful.

Write a simple sketch to drive the relay line, just high/low for 1 second at a time.

Put a meter on the relay and see which pair contacts are opening/closing when the arduino control signal switches.

Your hot/active line will then come in and go out those 2 screw terminals. Earth & Neutral will not be connected.

Are you sure the relay is rated for 240VAC and 10A?

Thanks for the reply. I will try this. Sorry about the attachment, I tried to upload a link to the DFRobot page. I think it is rated as that, it has 5VDC, 10A 277VAC marked on it.

Pioneer:
I don’t understand how to connect an appliance to it, I.E- A 240v 10A lamp with the regular active, neutral and earth wires. The relay module has a 4 pole screw connector marked as this :- IN, NC, OUT2, OUT1. Do I connect both active and neutral to this or just the active wire?

Think of this like you would when adding a manual on/off switch to a bedside lamp - you leave the Earth and Neutral from the wall socket to the lamp untouched. The only wire that you ‘interrupt’ with the switch is the Active line. Same with a relay. You use the relay to interrupt ( control ) the Active line.