利用双向串行端口，可在软件中进行输入通道选择、增益设置和信号极性配置。
Input channel selection, gain Settings and signal polarity can be configured in software using the bidirectional serial port.
有四个逻辑输入口和四个继电器，使界面连接闭包和RS - 232、RS - 485串行端口。
It offers four logical inputs and four relays for interfacing to contact closures and RS-232 and RS-485 serial ports.
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