Prepared by the back mounting method of the operation unit, the panel emergency stop push buttons switch that adopts the standard accessory trigger action mechanism to realize the charging unit protective cover the depth of possible industry shortest wiring from unnecessary two-way adjustment due to the thickness (IEC, has a certified CE mark display the UL / CSA standards and TUV (EN standard) in the EN standard) possible standard also used to panel cut dimensions Φ25.5mm