Standard 485 communication interface, built-in decoder board (pre-digital decoders optional) to support a variety of mainstream protocol, baud rate adjustable.
标准485通讯接口，内置解码板(预置位解码板选配)支持多种主流协议，波特率可调。
HART protocol which is the transitional protocol of field-bus allows transferring both digital signal and analog signal simultaneously in order to actualize bidirectional communication.
HART协议是现场总线的一种过渡性协议，可使数字与模拟信号同时传送且互不干扰，实现双向通讯。
Synchronous protocol and asynchronous protocol are in common use in digital communication.
数字通信中，常用的通信协议有同步协议和异步协议。
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