Cheap And Discounts 16 Channels 2NO 2NC Dual Group Relay Module 5A /24V DPDT Anti-interference Compatible with NPN/PNP for PLC Wholesale. Buy Directly From Merchant Foshan Aoshangming Technology Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.