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4端口rs-232/422/485通讯模块 ◆通讯接口:com1, com2:rs-232/422/485 com3, com4:rs-232 ◆波特率:50 bps ~ 230.4 kbps ◆数据信号:rs-232:txd, rxd, rts, cts, dtr, dsr, dcd, ri, gnd rs-422:tx , tx-, rx , rx-,rs-485: data , data- ◆fifo:128 bytes ◆数据流控:rts/cts, xon/xoff ◆保护(for com1,com2):esd保护:15kv ◆eft保护:2,500vdc ◆隔离保护:2,500vdc ◆保护(for com3,com4):esd保护:15kv |
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