RS485转以太网四路串口服务器RS422/232转10/100M网口RJ45通讯模块modbus网关电气隔离高防护TCP边缘采集MQTT
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¥99.6
24
¥117
22
¥24.6
37
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16
¥75
5
¥29
12
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¥83.3
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3