NRI G-18.mft User manual

National Rejectors, Inc. GmbH • Zum Fruchthof 6 • D-2 6 4 Buxtehude
Phone: [phone] • Fax: [phone] • E-mail: [email protected] • Internet: www.nri.de
CRANE
Technical Documentation
0 .06 GS/Bur/WMe/ds
Edition .
BA.G 8MFTAS-GB
Electronic coin validator
G-18.mft
with vending machine control system for 1-5-chute machines
Operating instructions

G- 8.mft with vending machine control system TABLE OF CONTENTS
3
National Rejectors, Inc. GmbH, Buxtehude
Ta le of contents
1 General information 7
General information about these instructions 7
General information about the coin validator 8
Advantages 9
Scope of delivery 9
2 Safety instructions 10
Proper use 0
Protecting yourself and equipment
3 Other operating modes of the G-18.mft 12
Parallel operation 2
Coin validator operation 2
Totalizer operation 2
Serial operation 3
Slave coin validator operation 3
Master operation 3
4 Design 14
The coin validator 4
Return lever 5
Switching blocks (on coin validator) 6
Function assignment of the DIL switches 7
Light-emitting diode (on coin validator) 8
Interfaces (on coin validator) 9
Interfaces 8/6 – additional control PCB (6-/ 4-pole) 9
Interface 5 – MDB periphery ( 0-pole) 9
Interface 0 – configuration (WinEMP/PalmEMP) 9
Label 20
The additional control PCB 2
Interfaces (additional control PCB) 2
Button and switches (additional control PCB) 2
Pilot lights (vending machine door) 22

TABLE OF CONTENTS G- 8.mft with vending machine control system
4National Rejectors, Inc. GmbH, Buxtehude
5 Functions 23
Coin acceptance 23
Coin channels and memory blocks 24
Accepted coin sensors 25
Prices 25
Sale 25
"Battery empty" detection 26
Inhibiting of specific coin types 26
Teach mode (optional) 26
Communication with MDB periphery (optional) 26
6 Starting up 27
Starting up in the vending machine 27
Install coin validator and additional control PCB 27
Perform test run 30
Set the prices 3
Set exact price or overpay mode 32
Connecting the device environment of the
PC programming station (WinEMP) 33
Connecting the Palm handheld (PalmEMP) 33
7 Operation 34
Inhibiting coins 34
Selecting memory block 36
Disabling price and test switches/button 36
Teaching coin channels in teach mode (optional) 37
8 Maintenance and service 40
Cleaning coin validator 40
Displaying battery voltage 4
Testing escrow, selection buttons, product ejectors,
motorized return mechanism manually 42
Status and error messages of the pilot lights in the
machine door 43
Troubleshooting 44

G- 8.mft with vending machine control system TABLE OF CONTENTS
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National Rejectors, Inc. GmbH, Buxtehude
9 Which functions can e set using WinEMP/
PalmEMP? 46
10 Technical data 47
CE certification 48
Mounting dimensions 49
Front view 49
Rear view 49
Top view 49
Pin assignment and connection diagrams for ... 50
... Product ejectors –5 50
... Escrow 50
... Motorized return mechanism 50
... Battery 50
... Selection buttons, pilot lights, return button
(vending machine door) 5
... MDB periphery ( 0-pole) 5
Accessories 52
Configuration software 52
Update software 53
GeldKarte card reader and display 53
Index 54
Glossary 59

G- 8.mft with vending machine control system GENERAL INFORMATION
7
National Rejectors, Inc. GmbH, Buxtehude
1 General information
This chapter should provide a general overview of the advantages and
options regarding the coin validator G- 8.mft with a vending machine control
system for -5-chute machines. The first section, however, is designed to
help you navigate easily within these operating instructions.
General information a out these instructions
These operating instructions describe the design and operation of the
electronic coin validator G- 8.mft with a vending machine control system for
-5-chute machines. Chapters 6 und 7 explain the necessary steps for
starting up and operating the coin validator. Chapter 8 explains how to clean
the coin validator and remedy the cause of a malfunction.
The appended index and glossary reduce the search for specific explanations.
Since the G- 8.mft can be used not only as a vending machine control
system for -5-chute machines but also in other operating modes, these
operating modes have been briefly described in Chapter 3. You will find a
detailed description and instructions regarding the use of these operating
modes in the separate general operating instructions for the G- 8.mft.
To make it easier for you to navigate within these instructions and to operate
the device, the following accentuations were made in the text:
•Safety instructions that must be taken into account in order to
protect operators and equipment have been written in bold and
provided with the pictogram .
• Special notes, which are to facilitate the use of the coin validator, have
been written in italics and also been given a pictogram .
•Requests to perform an action are numbered in another typeface.
• At the beginning of a chapter you will find a short "guide", which
summarizes the content of the chapter.

GENERAL INFORMATION G- 8.mft with vending machine control system
8National Rejectors, Inc. GmbH, Buxtehude
To configure and test the coin validator reference is made to the separate
documentation of the NRI PC software "WinEMP", of the NRI Palm handheld
software "PalmEMP" and of the NRI testers (refer also to Chap. 9 "Which
functions can be set using WinEMP/PalmEMP?"):
• WinEMP – The configuration and diagnostics program for NRI coin
validators, operating instructions for the G- 8
• PalmEMP – Operating instructions for configuration of the coin
validator G- 8.mft
• Tester G- 9.0594/4
If this documentation is not available to you, it can be downloaded
at any time from the NRI homepage (www.nri.de) in the compressed
PD format.
General information a out the coin validator
The battery-operated and microcomputer-controlled electronic coin validator
G- 8.mft (multi-frequency technology) is the successor model of the
G- 8.2900, whose reliable measuring sensor system and rejection of false
coins system were taken over and which has been designed in accordance
with the BDTA standard (Bundesverband Deutscher Tabakwaren-Groß-
händler und Automatenaufsteller) (federal association of German tobacco
product wholesalers and vending machine installers).
Because of its printed circuit board, which is protected against moisture and
high temperature variations, this is the ideal coin validator for power-supply-
independent vending machines in outdoor service use.
To be able to react as quickly as possible to new false coins and to enable
you to make your individual adjustments, this coin validator can be connected
to (cp. also section "Accessories" in Chap. 0 "Technical data"):
• a PC programming station, which consists of the configuration and
diagnostics software "WinEMP" (including card reader and chip card)
and an NRI tester.
• a mobile Palm handheld, on which the NRI program "PalmEMP" has
been installed, if the coin validator is to be configured on site in the
vending machine.
Old coins and new coins being added to a currency that have not been taken
into consideration at the manufacturer can be programmed on the coin
validator (optional teach mode).

G- 8.mft with vending machine control system GENERAL INFORMATION
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National Rejectors, Inc. GmbH, Buxtehude
Advantages
• Low current consumption
• Minimum operating voltage of less than 8 V
• Operating reliability even under extreme environmental conditions
such as minus temperatures and moisture
• Acceptance speed of three coins per second
• Multi-frequency technology for multiple scanning of inserted coins and
for evaluation of 6 measuring parameters for reliable coin recognition
• Quick reaction to changing market situations or to new false coins
ensured by simplified configuration with the help of
– the PC programming station "WinEMP" for the workshop
– the Palm handheld software "PalmEMP" directly on the vending
machine
• 2 coin channels which can be inhibited individually
• Integrated wake-up sensor
• Optional MDB periphery
• Optional teach mode for teaching up to six different tokens or coin
types
• Flash technology for uncomplicated and time-saving coin validator
operating software updates
Scope of delivery
In addition to the coin validator G- 8.mft, the following items are delivered to
you:
• Additional control PCB for connecting the vending machine
components such as the battery, escrow, selection buttons, pilot
lights, product ejectors, and motorized return mechanism
• 6-pole and 0-pole ribbon cable for connecting the additional control
PCB to the coin validator

SAFETY INSTRUCTIONS G- 8.mft with vending machine control system
0 National Rejectors, Inc. GmbH, Buxtehude
2 Safety instructions
Before operating the device for the first time, please read these operating
instructions carefully at least once, and most importantly the safety
instructions. This is to ensure you have understood the contents of this
manual as well as how to operate the coin validator.
Proper use
The battery-operated coin validators of the G- 8.mft series are intended to
be used in mains-independent power supply -5-chute machines for pre-
packed products of uniform shape, such as, e.g., tobacco and telephone
cards, and are supposed to check the coins inserted into the vending
machine for specific coin properties as well as control the vending machine
functions of the escrow, selection buttons, pilot lights, product ejectors and
coin return. Only use the coin validator for this purpose. Under no
circumstances can the manufacturer be held liable for any damage or loss
resulting from improper use of the device.
These coin validators have been constructed in compliance with the state
of the art and recognized safety regulations. Nevertheless this equipment
can be a source of danger. Therefore please observe the following safety
regulations.

G- 8.mft with vending machine control system SAFETY INSTRUCTIONS
National Rejectors, Inc. GmbH, Buxtehude
Protecting yourself and equipment
The coin validator may only e connected y a qualified
electrician.
Only use the coin validator according to proper use. Under no
circumstances can the manufacturer e held lia le for any
damage or loss resulting from improper use of the device.
The coin validator PCB is fitted with components that could e
damaged eyond repair y electrostatic discharge. Please
o serve the handling instructions for components exposed to
the risk of electrostatic discharge.
Apply the correct supply voltage to the coin validator (see
la el).
Ensure the correct potential equalization in the vending
machine.
Never pull the connecting ca le of the coin validator from the
additional control PCB when a voltage is applied.
De-energize the vending machine and coin validator efore
you install, clean or remove the device.
Contact NRI if you want to alter the construction of the device
to a greater extent than the modifications descri ed in these
instructions.
If the device is no longer required, please dispose of it
correctly.
We reserve the right to make technical modifications to the
device which are not covered y these instructions.

OTHER OPERATING MODES OF THE G- 8.MFT G- 8.mft with vending machine control system
2 National Rejectors, Inc. GmbH, Buxtehude
3 Other operating modes of the G-18.mft
Since the G- 8.mft can not only be used as a vending machine control
system for -5-chute machines but can also be used in other operating
modes by setting the switches, this chapter will now provide a brief
description of the other operating modes.
The device can work in
• parallel operation as a
– standard coin validator
– -price totalizer or
– 2-price totalizer and in
• serial operation according to the
– S protocol,
– BDTA MDB slave protocol or
– MDB master protocol.
You will find a detailed description and instructions regarding the use
of these operating modes in the separate general operating
instructions for the G-18.mft.
Parallel operation
For vending machines with a parallel interface, the coin validator G- 8.mft
can be used in two different operating modes, i.e., as an exclusive coin
validator or as a totalizer ( -price and 2-price totalizer).
Coin validator operation
The G- 8.mft is used as an exclusive coin validator whenever coins inserted
into a vending machine are checked for their properties and are to be
accepted for sale or rejected and directed into the return area as a result of
this inspection.
Totalizer operation
The G- 8.mft is used as a totalizer whenever it is supposed to data-manage
prices internally in addition to the coin inspection (see above). The G- 8.mft
compares these prices with the total value of the inserted coins. If the credit
reaches the price, the totalizer uses a price signal to trigger the handing-out
of the goods by the machine.
The totalizer can be used as a -price totalizer for setting one price or as a
2-price totalizer for setting two prices.

G- 8.mft with vending machine control system OTHER OPERATING MODES OF THE G- 8.MFT
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National Rejectors, Inc. GmbH, Buxtehude
Serial operation
For vending machines with a serial interface, the coin validator G- 8.mft can
be used in two different operating modes, i.e., as a slave or as a master.
Slave coin validator operation
In slave operation, the G- 8.mft is used as an exclusive coin validator. The
coins inserted into a vending machine are checked for their properties and
are accepted for sale or rejected and directed into the return area as a result
of this inspection.
The communication of the coin validator with the vending machine control
system is carried out via the MDB protocol or the S protocol. Accordingly,
the vending machine functions as a master and the coin validator as a slave.
The MDB protocol (MDB = Multi Drop Bus) is used in the case of the
G- 8.mft with BDTA (BDTA = Bundesverband Deutscher Tabakwaren-
Großhändler und Automatenaufsteller) (federal association of German
tobacco wholesalers and vending machine installers) restrictions for:
• voltage supply and
• battery operation.
The S protocol is an MDB protocol specified for NRI coin validators with
individual restrictions and commands for:
• voltage supply and
• sorting.
You can obtain further information about the MDB interface and S interface
in the
• BDTA MDB specification, which is available to you at the BDTA
• NRI S specification for the G-40 S , which NRI will gladly place at
your disposal upon your request.
Master operation
The G- 8.mft is used as a master whenever it is supposed to control
devices via the MDB protocol in addition to the coin inspection (see above).
The communication of the coin validator with a card reader, display or other
external device is carried out via the standard MDB protocol (MDB = Multi
Drop Bus), with the coin validator functioning as a master and all connected
devices, such as a card reader or display, functioning as a slave.
You will find detailed information about the MDB interface in the "NAMA
document MDB/ICP, 2.0" (www.vending.org).

DESIGN G- 8.mft with vending machine control system
4 National Rejectors, Inc. GmbH, Buxtehude
4 Design
This chapter describes the general design of the coin validator and the
additional control PCB and also the components that are important for
operating the device:
• Return lever, switching blocks, light-emitting diode, interfaces, label
• Interfaces, button and switches, pilot lights
The coin validator
7Light-emitting diode
8Interface – additional control PCB
9Coin outlet
10 Configuration interface –
PC programming station (WinEMP)/
Palm handheld (PalmEMP)
Fig. 1a: Design – G- 8.mft
2
1
3
6
10
9
7
4
5
8
4
1Return lever
2Coin insert funnel
3Switching blocks S –S3
4Mounting studs
5MDB interface – optional periphery
(display, card reader)
6Interface – additional control PCB

G- 8.mft with vending machine control system DESIGN
5
National Rejectors, Inc. GmbH, Buxtehude
Coins inserted into the coin validator pass through the coin insert funnel 2
into the measurement and validation area of the device, where their coin
properties are compared with the values of the stored acceptance bands.
Coins rejected by the coin validator are directed into the return area and
coins accepted for the vending operation leave the device through the coin
outlet 9, which is located at a fixed position because the coin validator does
not have a sorting function. (See Fig. a)
Return lever
The return lever 1 on the top of the coin validator is either directly operated
mechanically or motor-controlled using the return button on the vending
machine, if the coins which have already been inserted are to be returned
or a jam caused by coins, e.g., which have become stuck needs to be
removed. Operating the return lever opens the measurement and validation
area of the coin validator so that all objects in the coin validator are
transported into the return area. (See Fig. a)

DESIGN G- 8.mft with vending machine control system
6 National Rejectors, Inc. GmbH, Buxtehude
Switching locks (on coin validator)
On the rear of the device, the coin validator is
equipped with three switching blocks (S –S3) 3
located below one another. The two upper switching
blocks S and S2 have eight DIL switches each,
and the lower block S3 has ten. (See Fig. a)
The 2 available coin channels or the coin types
assigned to the coin channels can be inhibited
individually using the first six DIL switches of
switching blocks S and S2 (see section "Inhibiting
coins" in Chap. 7 "Operation").
DIL switch 7 on the switching block S is used to determine whether the
customer will receive his goods if he has a credit that corresponds exactly
to the price or also if his credit is higher than the set price (see section "Set
exact price or overpay mode" in Chap. 6 "Starting up").
Using the eighth DIL switch of the upper switching block S , you can disable
the operating button and operating switches of the additional control PCB
(see section "Disabling price and test switches/button" in Chap. 7 "Operation").
DIL switch 7 on the lower switching block S2 is used to set the coin validator
into teach mode in order to be able to configure new coins or tokens on site
without using any additional tools (see section "Teaching coin channels in
teach mode" in Chap. 7 "Operation").
The eighth DIL switch of the middle switching block S2 is used to define the
operating mode "vending machine control" (see Chap. 6 "Starting up").
The DIL switches –8 of the lower switching block S3 are not assigned in the
operating mode "vending machine control". Their switch position is not
relevant.
DIL switch 9 of the switching block S3 is used to set the MDB protocol and
DIL switch 0 is used to select which of the two memory blocks the coin
validator is to access (see Chap. 6 "Starting up" and section "Selecting
memory block" in Chap. 7 "Operation").
S1
S2
S3

G- 8.mft with vending machine control system DESIGN
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National Rejectors, Inc. GmbH, Buxtehude
Function assignment of the DIL switches
Switching block S
DIL switch off on
S . Coin channel vacant inhibited
S .2 Coin channel 2 vacant inhibited
S .3 Coin channel 3 vacant inhibited
S .4 Coin channel 4 vacant inhibited
S .5 Coin channel 5 vacant inhibited
S .6 Coin channel 6 vacant inhibited
S .7 Product sale in case of overpay exact price
S .8 Switches/button, additional PCB disabled enabled
Switching block S2
DIL switch off on
S2. Coin channel 7 vacant inhibited
S2.2 Coin channel 8 vacant inhibited
S2.3 Coin channel 9 vacant inhibited
S2.4 Coin channel 0 vacant inhibited
S2.5 Coin channel vacant inhibited
S2.6 Coin channel 2 vacant inhibited
S2.7 Operation normal teach mode
S2.8 Operation control –
Switching block S3
DIL switch off on
S3. not assigned
S3.2 not assigned
S3.3 not assigned
S3.4 not assigned
S3.5 not assigned
S3.6 not assigned
S3.7 not assigned
S3.8 not assigned
S3.9 Operation MDB configuration
S3. 0 Memory block 0
S1
S2
S3
S
S2
S3
S
S2
S3

DESIGN G- 8.mft with vending machine control system
8 National Rejectors, Inc. GmbH, Buxtehude
Light-emitting diode (on coin validator)
The light-emitting diode (LED) 7 (see Fig. a) indicates, on the one hand, the
voltage state of the battery if the return lever is pressed after a coin has been
inserted (see section "Displaying battery voltage" in Chap. 8 "Maintenance
and service").
On the other hand, the LED lights up when memory block 0 or is switched
active (see section "Selecting memory block" in Chap. 7 "Operation").

G- 8.mft with vending machine control system DESIGN
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National Rejectors, Inc. GmbH, Buxtehude
Interfaces (on coin validator)
On the rear of the coin validator there is a 6-pole 8 and a 4-pole 6 interface
to the additional control PCB (to the vending machine). At the bottom of the
device there is a connecting plug 10 for the PC programming station or the
Palm handheld. Peripheral devices, such as a display or card reader, can
be connected to the 0-pole MDB interface 5. (See Fig. a)
Interfaces 8/6 – additional control PCB (6-/14-pole)
These two interfaces are used to connect the coin validator to the additional
control PCB to which the vending machine components such as the battery,
escrow, selection buttons, pilot lights, product ejectors, and return
mechanism are connected (see section "The additional control PCB" in this
chapter).
Interface 5 – MDB periphery (10-pole)
If the G- 8.mft is operated as a -5-chute vending machine control system,
use an MDB cable set to connect all slave devices, such as an MDB card
reader and MDB display to this interface (see section "Accessories" in
Chap. 0 "Technical data").
or further information on the MDB interface, please refer to "NAMA
document MDB/ICP, 2.0" (www.vending.org).
or details regarding pin assignment, see section "Pin assignment
and connection diagrams" in Chap. 10 "Technical data".
Pin 7 of this interface has been assigned to a wake-up line. The coin validator
itself is woken up from an energy-saving standby mode by the insertion of
a coin and then wakes up all connected slave devices via the wake-up line.
The coin validator is now in its active state and keeps the wake-up line on
"low" = active (all devices ready for operation) until the inserted coin has
been processed.
Interface 10 – configuration (WinEMP/PalmEMP)
To configure the coin validator the device is connected to a PC or a mobile
Palm handheld. For that purpose, the G- 8.mft is equipped at the bottom
with a PCB direct plug (see Fig. a), which is used to connect the coin
validator to the PC programming station or to a Palm handheld. The device
can then be set up using the configuration and diagnostics software
"WinEMP" or "PalmEMP" (see Chap. 6 "Starting up" and Chap. 9 "Which
functions can be set using WinEMP/PalmEMP?").
or details regarding pin assignment, see section "Pin assignment
and connection diagrams" in Chap. 10 "Technical data".

DESIGN G- 8.mft with vending machine control system
20 National Rejectors, Inc. GmbH, Buxtehude
La el
The label of the coin validator contains all the data defining the device such
as the device type and nominal voltage as well as customer-specific default
values such as the currency, coin types and coin channel data:
Fig. 1 : Label – G- 8.mft
1
1213141516
17
56 7 8
9
23 4
11
10
1Channel data – memory block 0
2Date of manufacture
3Currency – memory block
4Currency – memory block 2
5Channel data – memory block
6Device type
7Data block number
8Revision no. for data block download
9Nominal voltage
10 Bar code
11 Ordering code/order no./
consecutive device no. per order number
12 Coin outlet , since without sorting
device, always "3"
13 Coin signal line , not relevant for
G- 8.mft with vending machine control
system
14 Very narrow coin channel
15 Narrow coin channel
16 Normal coin channel
17 Coin type