| 摘要 |
An audit monitoring system ( 10 ) is provided for use with any of a multiplicity of different coin operated vending machines ( 300 ). The audit monitoring system includes an interface assembly ( 102 ) for use in replacing an existing data link ( 330 ) within vending machine ( 300 ). The interface assembly ( 102 ) is coupled to an audit monitoring assembly ( 100 ) which interprets the communications signals transferred between a controller ( 310 ), coin changer ( 322 ) and bill validator ( 324 ) of vending machine ( 300 ). Audit monitoring assembly ( 100 ) is powered from a power supply ( 302 ) of vending machine ( 300 ) and includes interface circuitry ( 110,120,130 ) for receipt of digital logic level signals, serial data or relay logic signals from vending machine ( 300 ). Additionally, the data retrieval terminal ( 20 ) may be removably coupled to the audit monitoring assembly ( 100 ) through either a hard wired coupling ( 254 ) through a serial interface ( 250 ) or alternately by means of infrared optical signals ( 12, 22 ) through an infrared interface circuit ( 260 ).
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