FIELD: card reading equipment. SUBSTANCE: electric circuit of device has unit for testing card insertion into card reader and its removal from reader. Second given potential level is applied to one brush contact member, which is shifted with respect to other brush contact members, so that when a card is inserted into slot in correct way, then one event is realized. When card is removed and prior to disconnection of other brush members from conducting contact plates of card they are in contact with. This means that either brush contact member under given potential and brush contact member under zero potential are short-circuited, or second potential is altered by value, which is not less than given threshold value. EFFECT: increased reliability. 10 cl, 14 dwg, 1 tbl
