1通道RS-232端口扩展板(用于I-7188XA,I-7188XC) RS-232端口:1个 COM :TxD, RxD, RTS, CTS, DSR, DTR, DCD, RI, GND ( without case, for I-7188XA / I-7188XC ) COM : TxD, RxD, GND ( with case, for I-7188XC ) 兼容16550 内部FIFO : 16 bytes 传输速率:最大115.2K bps Modem控制 隔离:无 尺寸:64mm * 32mm 功耗:0.4W X500 1-Port RS-232 ( 9-Pin )