SPECIFICATION Power requirements: DC4.5V - 5V, with inside positive, outside negative; or DC9-12V, First pin connectes to VDD, second pin connected to GND. PCB dimensions: 71mm X 47mm Master control chip STC15F104W Each channel is set from 1 to 255 seconds delay independently Simple to operate, most serial instruction are single byte instruction Onboard 2 relay (which can be accessed extended 2-way relay module) With absorption diode circuit Each relay has a LED indicator, LCD lights relay absorption With 1-channel power indicator With capacitor filter circuit, with improved stability Support for 5V or 9-12V input voltage The thickness of PCB is 1.6mm, made from military FR-4 board material,along with mounting holes Interface: J5: using 5V power supply input J6: using 9 ~ 12V power input, No.1 pin connects VCC, No.2 connects GND J3 ~ J4 blue terminal: connect user load, it can be used 220V AC, or less than 30V DC device, the device current can not exceed the relay standard load . Each relay has a normally open contact, a normally closed contact and a common contact. When relay absorps, the common contact and normally open contact conduct; when the relay releases, public contact and normally closed contact conduct. Serial communication in speed 9600bps, relay control command byte format 7 6 5 4 3 2 1 0 0 0 Command code CH4 CH3 CH2 CH1
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