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The default delivery 5v relay relay - 8 road relay module 1. relay using pine le relay and contact output capacity of 10 a 250 vac, 10 a 125 vac, can replace the 5 v, 12 v, 24 v relay 2. 8 input signals are low level effectively. 3. the optical coupling isolation, input power and relay power can be separated from the power supply. Can also be a total of a power supply, safe and reliable, strong compatibility, anti-interference. The relay power supply and system power supply can be separated A jump cap set. Jump hat off. Can separate the power supply