15 April 2021
Two lock elements come with LAD311. The first one, already mounted on LAD311 when delivered is suitable for almost all cases of LC1D contactor. However, depending on the type of coil of the contactor (DC or AC), this element shall be mounted in one position for DC or turned by 180° around an horizontal axis for AC coil contactor. Note that on the lateral face of this elements the markings “DC” or “AC” mounted upwards indicates the right position to be used. The second LAD311 lock element shall be used when mounting contactors LC1D09 to LC1D18 with screw clamp. In this case, this element shall be mounted on LAD311 instead of the first one which can be scrapped away.
See attached document for reference.