Db9 rs232 pinout rs422 rs485 connector male diagram rs length dfrobot maximum cable Db9 male connector for rs232/rs422/rs485 Db9 9-pin female adapter rs-232 serial port interface breakout board
DB9 Male Connector For RS232/RS422/RS485 - DFRobot
Number wiring pinout serial z4000 voltage float tips port pinouts db connected ground earth house