CI873 ABB CI873K01 [caption id="attachment_1519" align="aligncenter" width="600"] CI873K01[/caption] CI873 is an AC 800M communication interface that connects to an external Ethernet device using Ethernet /IP protocol. The TP867 substrate has two RJ45 Ethernet connectors, but only uses the CH1 connector that supports 100Mbps. The CI873 extension unit contains the CEX bus logic, the
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