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1, the onboard MAX485 chip, is a for RS - 485 communication of low power consumption, limit rate transceiver
2, the onboard 5.08 (mm) spacing 2 p terminal, convenience of RS - 485 communication connection
All three, chip pins has led, can be operated by single chip microcomputer control
4, working voltage: 5 v
5, the board size: 44 (mm) x14 (mm)