[Discontinued] RS232 Serial Control for DC 5V 2-Channel Relays

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