5 16 Oper ating Instr u ctions CM Synchronous Ser v omotors Electrical Inst allation 53 C onnecting the motor via terminal box Connecting the motor via terminal box A ccording to the enclosed wiring diagram Connection wiring diagrams in the section Appendix C heck the cross sections of cables T ighten connections and pr otective earth conductors I n terminal boxes Check winding c onnections and tighten if necessary In case of operation with electronic contro l units it is essential to adhere to the corresponding operating inst ructionswiring diagrams The core colors listed in the following ta bles correspond to the color code for SEW EURODRIVE cables 50988AXX Cont act Core identification Connection U1 Black with white lettering U V W U V1 V W1 W PE Greenyellow P rotective earth WV U