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CH1: 1 Signal to Trigger the end of the Relay Module (High Level Trigger Valid). (3.3-5V State High Relay OFF). (0-2.5V Low State Relays ON). DC -: Connect Power Negative.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.