RS232 Serial Control for DC 5V 2-Channel Relays

brand: SainSmart SKU: 101-70-166
$10.99
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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