FBs-CM22
2个RS232(Port3+Port4)之扩充通讯模组
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FBs-CM55
2个RS485(Port3+Port4)之扩充通讯模组
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FBs-CM25
1个RS232(Port3)+1个RS485(Port4)之扩充通讯模组
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FBs-CM25E
1个RS232(Port3)+1个RS485(Port4)+乙太(Ethernet)网络界面扩充通讯模组
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FBs-CM55E
1个RS485(Port3)+1个RS485(Port4)+乙太(Ethernet)网络界面扩充通讯模组
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FBs-CM25C
光隔离之泛用RS232←→RS485转换器(Converter)
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FBs-CM5R
光隔离之泛用RS485中继器(Repeater)
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FBs-CM5H
光隔离之泛用4个RS485集线器(HUB)
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