This Datasheet is for the IC695NKT001 The IC695NKT001 for the Rx3i is an Ethernet NIU Kit includes NIU (IC695NIU001) and Ethernet Module (IC695ETM001). The IC695NKT001 ENIU supports two serial ports and 20k of local logic. The ENIU must be installed in a IC695CHSxxx base. http://www.qualitrol.com/shop/p-16043-ic695nkt001.aspx For further information, please contact Qualitrol Technical Support at 1-800-784-9385 [email protected]