APPARATUS FOR PREVENTING ERROR WHEN INSERTING UNIT INTO SHELF BOARD

摘要

PURPOSE: An apparatus for preventing an error when inserting a unit into a shelf board is provided to be incapable of a physical insertion when inserting an other unit by manufacturing holes at an other location of each unit in the case of inserting a unit into a shelf using a slot. CONSTITUTION: A conductive surface(21) is formed on an upper surface of a hole connect(20) for passing a current. Two holes(22) are holed at any position of the conductive surface(21). The current does not flow in a space in which the two holes(22) are holed because the conductive surface(21) does not exist. Two holes(22) are arranged at an other position according to the number of unit. If 10 holes are holed in the hole connect(20), a pair of 5 holes are formed.