As described in the Hardware Guide of SoMachine Basic, the PLC TM221xx RJ-45 connector with RS485 has some pins that MUST not be connected: Pins 1,2,3 and 6.
Please do not use 8 wires cables, use the cable reference XBTZ9980 (4 wires cable).
Please do not use 8 wires cables, use the cable reference XBTZ9980 (4 wires cable).