This store is committed to bring you the high quality goods from China. It is a professional wholesaler.
If you have any questions, please feel free to contact us, we hope to establish long-term relations of cooperation with you, thank you!
Instructions before buy
When you select "Sellers Shipping Method" or "China Post Ordinary Small Packet Plus " as the shipping way, that would be no tracking number. But the shipping time is the same as usual.
If you want a tracking number. Please choose the "China Post Registered Air Mail".
Some product have battery or magnetism, it will be send by "singapore post" only.
Shipping time:According To Your Country, 10-90 Days.
OUR module or send data only describe the introduction, there is no technical advisory support, please carefully shot beginners.
1, the module complies with international safety standards, the control area and a load region isolation trench;
2, Song Music authentic relay;
3, with the power and relay instructions, pull off, disconnect does not shine;
4, when the signal input signal, and the common terminal and the normally open will be turned on;
5, can be used microcontroller development board module can be used as appliance control;
6, the control of DC or AC signal, you can control 220V AC load;
7, there is a normally-open and one normally closed contact;
8, blue KF301 terminals to the control line is more convenient.
About the high and low trigger mode of explanation, friends do not understand a look:
High voltage trigger finger is triggered, it can be understood as a mode signal input terminal and VCC between positive short trigger signal input terminal and ground;
It refers to a low-voltage trigger signal input terminal and the ground is OV trigger modes, can be understood as a way to signal input terminal and GND negative short-circuit triggered
1 relay module wiring
Please feel free contact us if you have any problems. We are pleasure to help you.
Your Satisfied let us do better!!!
IF YOU ARE SATISFIED WITH OUR SERVICE AND PRODUCT
PLEASE WITH 5 STARS
About Customer service
1. Please forgive we cant keep a 24hours online service because of time lag, if you have any questions, order inquiry, product model, color, shipment tracking etc. please leave us message, we will reply on 24h.
2. If you have quality problem of the goods, please contact us asap. We will try our best to solve your problem. Please dont leave any negative feedback before you gave us this opportunity.
3. Customer Satisfaction our prime concern, your support is our greatest encouragement.
About Return & Refund
1. You have 7 days to contact us and 30 days to return it from the date it was received. If this item is in your possession more than 7 days, it is considered used and WE WILL NOT ISSUE YOU A REFUND OR REPLACEMENT. There are NO EXCEPTIONS! Shipping cost is bear by both seller and buyer in half.
2. All returned items MUST BE in the original packaging and you MUST PROVIDE us with the shipping tracking number, specific reason for the return, and your po#.
3. We will refund YOUR FULL WINNING BID AMOUNT, upon receipt of the item in its original condition and packaging with all components and accessories included, AFTER BOTH Buyer and Seller cancel the transaction from aliexpress. OR, you may choose to have a replacement.
4. We will bear all the shipping cost if the product(s) is (are) not as advertised.