The Module front and back, both sides of the power supply is connected together, you can just take one side, both sides were two independent channels can be used, arrows indicate the signal flow, to explain where is the input, the outward description is output, near the end of RS232 RS232 character level character near the end TTL TTL level.
- A converter board for electrical levels
- Chip Model: MAX3232CSE
- Voltage Range: 3~5V
- Max. Baud Rate: No more than 120kbps
- Dimension: 9.4mm x 15.9mm