| 摘要 |
An access control apparatus has a blocking element ( 1 ) which is moved by a motor ( 2 ) or similar actuator controlled via a control means. Provided are a first access authorization reader ( 12, 14 ), a second access authorization reader ( 13, 15 ) after the first access authorization reader ( 12, 14 ) in the area of the blocking element ( 1 ) as well as a people sensor ( 16 ) before the blocking element ( 1 ). The motor ( 2 ) can be driven by the first access authorization reader ( 12, 14 ) in the normal case, that is, upon valid reading of access authorization by the first access authorization reader ( 12, 14 ), by the second access authorization reader ( 13, 15 ) upon detection of a person and invalid reading of access authorization by the first access authorization reader ( 12, 14 ), and by the first access authorization reader again upon valid reading of access authorization of the detected person by the second access authorization reader ( 13, 15 ).
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