MEI CASHFLOW 2612, Инженерный справочник

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Cashflow
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2612 Engineers Handbook
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MEI 2009 Page 27 G1
Interfaces
General
The interface of a note acceptor refers to the transfer of electronic data to and from the note
acceptor and the controlling device. The controlling device in a vending machine is either the
machine controller or the coin mechanism (single or four price machines). The signals
transferred to the note acceptor are control signals which may include:
•
the control system is ready to accept money
•
the denomination of note to accept
•
whether or not notes should be returned from escrow
The following interfaces are available with the Cashflow
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2612 (24vAC).
IHLP - Isolated High Level Pulse
IHLP is also known as AC/High Level interface. Refer to diagram for switch settings.
This interface uses the application of AC voltages for enabling and inhibiting a note
acceptor. Credit is established through single 150 ms "switch" closures (pulses).
Note escrow is not supported. IHLP only supports €5 notes.
A single coin tube is monitored for the presence of change in order to determine if
an exact change condition exists. If such a condition exists, the exact change light
will be turned ON and the note acceptor will be inhibited; it will not pull the note in.
ILLP - Isolated Low Level Pulse
ILLP is also known as Low Level interface. Refer to diagram for switch settings.
This interface uses the application of isolated DC voltages for enabling and
inhibiting a note acceptor. Credit is established through
short or long "switch"
closures (pulses).
Note escrow is supported. ILLP supports €5 and €10.
All coin tubes are monitored to determine if an exact change condition exists. If
an exact change condition exists, the exact change light will be turned ON after a
note has been inserted.
MDB - Multi-Drop Bus (24VAC units only)
Refer to diagram for switch settings.
This interface uses the application of a specific bi-directional serial interface protocol for
communication between a controller and a note acceptor.
MDB supports €5 and €10.
All coin tubes are monitored for the presence of change in order to determine if an
exact change condition exists. If an exact change condition exists, the exact change
light will be turned ON after a note has been inserted.