Product DescriptionThe relay contact capacity is 250V10A.The relay output is normally open and normally closed; Active low. Relay signal input voltage range: 0-5V;VCC system power supply.JD-VCC relay power supply.Just short JD-VCC and VCC.1. There are 4 fixing screw holes around the boardwith a diameter of 3.1mm, which is convenient for installation And fixed2.The relay uses high-quality relays, single poledouble throw. A public terminal,One normally open end,one normally closed end.3.Optocoupler isolation,good anti-interference.4.Low level pulls in and high level releases.The statusindicator is on when it is closed,and when it is released Status indicator off.5. VCC is the system power supply,and JD_VCC is therelay power supply. Plug in the jumper cap can.6. Module size: 50.5 x 38.5mm.Colour: BlackMaterial: PC+MetalPackage Contents:5 x 2 channel relayOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.