[Indicator Optimization] On-board five LED indicators, used to indicate the circuit signal sending and receiving status, the indicator corresponds to the status of the four interface signals and module power supply.
[Optimized for use] Aluminum alloy shell, oxidation frosted treatment, with mounting holes, long-distance transmission 422/485 end with lightning gas discharge protection circuit, baud
rate support range: TTL
(UART): 2M bps; RS 232: 256 K bps; RS422/RS 485: 1 M bps