

6 analog IO port and power

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Operation/programming mode switch

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Automatic/manual transceiver mode switch (When in manual transceiver mode, the enable end is

the 2nd digital IO port)



Transceiver indicating LED



Standard RS485 interface, mini RS485 interface(PH2.0) and RS485 pins



Weldable area



Reset button

Pin Definition

Operation and programming mode switch: To OFF, you can download the program for the

Arduino controller. To ON , the shield will convert the UART to the RS485.

Transceiver mode switch: To AUTO, the shield is automatically sending and receiving data, so you

do not care about operation timing; To MANU, the shield is in manual transceiver status, and the

enable end is the 2nd digital IO port. Enabling high-side power Ping to sending state while the low

level of the receiving state.