5 Installation Procedure16 YASKAWA ELECTRIC SIEP C730600 91C YASKAWA AC Drive Option SI-EM3 Technical Manual3. Insert the option card (B) into the CN5-A (L) connector on the drive and fasten it into place using one of theincluded screws (H). Tighten the screw to 0.5 to 0.6 Nm (4.4 to 5.3 inlb).Figure 6Figure 6 Insert the Option4. Connect one end of the ground wire (I) to the ground terminal (K) using one of the remaining provided screws(H). Connect the other end of the ground wire (I) to the remaining ground terminal and installation hole on theoption (B) using the last remaining provided screw (H). Tighten both screws to 0.5 to 0.6 Nm (4.4 to 5.3 inlb).Figure 7Figure 7 Connect the Ground WireNote: The drive has only two ground terminal screw holes (K). Two ground wires should share the same ground terminal whenconnecting three options.LHBA1000HIKBA1000