[Discontinued] RS232 Serial Control for DC 5V 2-Channel Relays
£6.30
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101-70-166
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Description
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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