It is possible to use MBKT connectors and 990NAD23000 T junctions on the same Modbus Plus network. The only restriction is that the continuity of the data signals is maintained. This simply means that pin 1 of the MBKT connectors (white wire) must be connected to the white terminals of the T junctions and that pin 3 of the MBKT connectors (black wire) must be connected to the black terminals of the T junctions.