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Technical Description
Validator
Central to the operation of the validator is a microprocessor and associated RAM. The programmes running in the microprocessor control not only the note recognition but are also closely linked to the note transport system. Programme and note validation data is held in Flash EEPROM while the unit is powered down and immediately loads the RAM with all required data once the power is applied. It is useful to examine the memory structure of the validator. There is 64K Bytes of memory inside the Smiley Validator, 32K Bytes of Static RAM for normal operation, and 32K Bytes of 'Flash' Memory used to store taught note data and validation and control programmes.
 
RAM Usage:
256 Bytes are used to save note data whenever a note is read in. During manual teaching each note read in is saved temporarily in RAM. In this way a table is built up in memory. This table can contain a maximum of fifty note reads. If a fifty first note is entered into the Smiley, this data over writes the previous note that was read. When the Red Select Button is pressed OR the Teach/Run switch is slid to the Run position the table of notes is analysed to determine a definition of the note face. This definition is then saved in Flash memory for future validation tests. Further faces can then be taught, processed, and stored, either in the same channel if the value of the note is similar, or in a different channel for different values of note.
FLASH Usage:
The Smiley has four note channels. Each channel will normally store a different denomination note.
Each channel may contain up to ten faces.
Each note to be validated has four faces.
One face requires 512 Bytes of memory. In this way up to forty different faces may be recognised, split into four denominations.

Channel 5 is an emergency channel that may be programmed with up to 6 faces of unacceptable or false notes that will always be rejected.
There is also a small general data table that is saved in Flash memory that maintains a record of how many faces there are in each channel, what is the next available face in a channel for note storage and other set up information about the condition of the light sources. This table is updated automatically whenever a new face is taught.
It is not recommended that the power supply be removed whilst note teaching is in progress. If power is lost during a Teaching session the note data currently being 'learned' will be lost.

 

 

Environment and Power Requirements

 

 

 

 

Environment Minimum Maximum
Temperature +5oC +35oC
Humidity 5% 95% Non condensing

 

 

Do not use in Direct Sunlight

 

 

 

 

 

Electrical Supply
Minimum
Maximum
Supply Voltage (V dc) Absolute Limits
11V
15V
Supply Ripple Voltage
0
0.25V @100Hz
VCOM (Host logic high)
4V
30V
Supply Currents
 
 
Standby
 
120mA
Validating
 
300mA
Stalled
 
350mA
Peak (Motor start or stall)
 
800mA
The connection of a stacker unit will add a negligible standby current, and the total peak current of the combined validator and stacker will not exceed the figures given above for the validator alone. (The stacker motor is only activated when the validator motor has stopped).
 
It is essential that the dc supply is sufficiently well regulated to cope with an 800mA surge and still remain at all times above 11V. If the voltage drops below 10V the outputs will be disabled, and there will be a 100ms delay before they are re-enabled after the power supply voltage is restored to specification.

 

 

Installation and Interfaces

 

Interface Logic levels Logic Low Logic High
Inputs 0V < Low < 1.35V +3.7V < High <(+VCOM+0.5V)
Outputs with 10KW pull up 0.8V pull up voltage of host interface

 

 

Note that the output low signal depends on the impedance of the pull up resistor on the host interface.

 

All outputs are open collector transistors with 120W in series.

All Inputs are held high to +VCOM via 10KW

 

Pin
Name:
Description:
1
Vend 1
Note accepted on Channel 1 pulse output (100milli secs)
Also the serial Output Pin in Serial Mode
2
Vend 2
Note accepted on Channel 2 pulse output
3
Vend 3
Note accepted on Channel 3 pulse output
4
Vend 4
Note accepted on Channel 4 pulse output
5
Inhibit 1
Inhibit channel 1 by holding this pin HIGH. To Enable a channel the inhibit must be held LOW.
6
Inhibit 2
Inhibit channel 2 by holding this pin HIGH
7
Inhibit 3
Inhibit channel 3 by holding this pin HIGH
8
Inhibit 4
Inhibit channel 4 by holding this pin HIGH
9
Escrow
Operate Escrow function by holding LOW, refer to Escrow section for full details
10
Alarm
Problem indication Output
11
Supply Voltage
 
12
0V Supply
 
13
+VCOM
Must be connected to the host machine interface supply voltage. See Circuit Outlines
14
Parallel /Serial Select
Hold this pin HIGH for Parallel Pulse output. Connect this pin LOW for Serial Outputs.
15
Factory Test Pin
FACTORY USE ONLY - DO NOT CONNECT

Input and Output Circuits:

The Smiley provides either parallel or serial output if greater system security is required. All the inputs are always parallel. At present there is no facility for serial input.
 
Parallel Outputs:
To use parallel outputs pin 14 must be held high or left unconnected.
 
Vend Signals ( Pins 1 to 4). The four channels have their own individual outputs. If a note is recognised then the relevant channel line is pulled low for 100 + 5 milliseconds. It is recommended that pulses outside these limits are rejected as a precaution against false triggering due to noise.
 
Alarm Output: (Pin 10). This is a general purpose problem indication line. If a problem occurs then this signal will go low for 100milliseconds. The alarm signal will operate whenever one of the following conditions occurs:-
1) If the rear flag is raised when a note is not present                                     
2) If a note is being returned to the customer and some how the note has become longer - i.e. strimming is  being attempted.
3) If the stacker is full or a note is jammed in the validator.
 

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