NRI G-18.mft Operating Instructions Manual

Technical Documentation

Electronic coin validator

G-18.mft

with vending machine control system for 1-5-chute machines

Operating instructions

01.06 GS/Bur/WMe/ds
Edition 1.1
BA.G18MFTAS-GB

CRANE

National Rejectors, Inc. GmbH • Zum Fruchthof 6 • D-21614 Buxtehude
Phone: [phone] • Fax: [phone] • E-mail: [e-mail] • Internet: www.nri.de

G-18.mft with vending machine control system TABLE OF CONTENTS

Table 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 10

Protecting yourself and equipment 11

3 Other operating modes of the G-18.mft 12

Parallel operation 12

Coin validator operation 12
Totalizer operation 12

Serial operation 13

Slave coin validator operation 13
Master operation 13

4 Design 14

The coin validator 14

Return lever 15
Switching blocks (on coin validator) 16

Function assignment of the DIL switches 17

Light-emitting diode (on coin validator) 18
Interfaces (on coin validator) 19

Interfaces 8/6 – additional control PCB (6-/14-pole) 19
Interface 5 – MDB periphery (10-pole) 19
Interface 10 – configuration (WinEMP/PalmEMP) 19

Label 20

The additional control PCB 21

Interfaces (additional control PCB) 21
Button and switches (additional control PCB) 21
Pilot lights (vending machine door) 22

National Rejectors, Inc. GmbH, Buxtehude

3

TABLE OF CONTENTS G-18.mft with vending machine control system

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 31
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 41

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

4

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system TABLE OF CONTENTS

9 Which functions can be 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 1–5 50
... Escrow 50
... Motorized return mechanism 50
... Battery 50
... Selection buttons, pilot lights, return button

(vending machine door) 51
... MDB periphery (10-pole) 51

Accessories 52

Configuration software 52
Update software 53
GeldKarte card reader and display 53

Index 54
Glossary 59

National Rejectors, Inc. GmbH, Buxtehude

5

G-18.mft with vending machine control system GENERAL INFORMATION

1 General information

This chapter should provide a general overview of the advantages and
options regarding the coin validator G-18.mft with a vending machine control
system for 1-5-chute machines. The first section, however, is designed to
help you navigate easily within these operating instructions.

General information about these instructions

These operating instructions describe the design and operation of the
electronic coin validator G-18.mft with a vending machine control system for
1-5-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-18.mft can be used not only as a vending machine control
system for 1-5-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-18.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.

.

.

National Rejectors, Inc. GmbH, Buxtehude

7

GENERAL INFORMATION G-18.mft with vending machine control system

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-18

• PalmEMP – Operating instructions for configuration of the coin
validator G-18.mft

• Tester G-19.0594/4

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
PDF format.

General information about the coin validator

The battery-operated and microcomputer-controlled electronic coin validator
G-18.mft (multi-frequency technology) is the successor model of the
G-18.2900, 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-Groß­händler 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-supply­independent 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. 10 "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).

8

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system GENERAL INFORMATION

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 16 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

• 12 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-18.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 10-pole ribbon cable for connecting the additional control

PCB to the coin validator

National Rejectors, Inc. GmbH, Buxtehude

9

SAFETY INSTRUCTIONS G-18.mft with vending machine control system

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-18.mft series are intended to
be used in mains-independent power supply 1-5-chute machines for pre­packed 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.

10

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system SAFETY INSTRUCTIONS

Protecting yourself and equipment

The coin validator may only be connected by a qualified
electrician.

Only use the coin validator according to proper use. Under no
circumstances can the manufacturer be held liable for any
damage or loss resulting from improper use of the device.

The coin validator PCB is fitted with components that could be
damaged beyond repair by electrostatic discharge. Please
observe the handling instructions for components exposed to
the risk of electrostatic discharge.

Apply the correct supply voltage to the coin validator (see
label).

Ensure the correct potential equalization in the vending
machine.

Never pull the connecting cable of the coin validator from the
additional control PCB when a voltage is applied.

De-energize the vending machine and coin validator before
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 described 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 by these instructions.

National Rejectors, Inc. GmbH, Buxtehude

11

OTHER OPERATING MODES OF THE G-18.MFT G-18.mft with vending machine control system

3 Other operating modes of the G-18.mft

Since the G-18.mft can not only be used as a vending machine control
system for 1-5-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
– 1-price totalizer or
– 2-price totalizer and in

• serial operation according to the
– S1 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-18.mft
can be used in two different operating modes, i.e., as an exclusive coin
validator or as a totalizer (1-price and 2-price totalizer).

Coin validator operation

The G-18.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-18.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-18.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.

12

The totalizer can be used as a 1-price totalizer for setting one price or as a
2-price totalizer for setting two prices.

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system OTHER OPERATING MODES OF THE G-18.MFT

Serial operation

For vending machines with a serial interface, the coin validator G-18.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-18.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 S1 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-18.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 S1 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 S1 interface
in the

• BDTA MDB specification, which is available to you at the BDTA

• NRI S1 specification for the G-40 S1, which NRI will gladly place at

your disposal upon your request.

Master operation

The G-18.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).

National Rejectors, Inc. GmbH, Buxtehude

13

DESIGN G-18.mft with vending machine control system

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

1

2

3

4

7

5

6

8

9

14

10

4

Fig. 1a: Design – G-18.mft

1 Return lever

2 Coin insert funnel

3 Switching blocks S1–S3

4 Mounting studs

5 MDB interface – optional periphery

(display, card reader)

6 Interface – additional control PCB

7 Light-emitting diode

8 Interface – additional control PCB

9 Coin outlet

10 Configuration interface –

PC programming station (WinEMP)/
Palm handheld (PalmEMP)

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system DESIGN

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. 1a)

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. 1a)

National Rejectors, Inc. GmbH, Buxtehude

15

DESIGN G-18.mft with vending machine control system

Switching blocks (on coin validator)

On the rear of the device, the coin validator is
equipped with three switching blocks (S1–S3) 3
located below one another. The two upper switching
blocks S1 and S2 have eight DIL switches each,
and the lower block S3 has ten. (See Fig. 1a)

The 12 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 S1 and S2 (see section "Inhibiting
coins" in Chap. 7 "Operation").

DIL switch 7 on the switching block S1 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").

S1

S2

S3

Using the eighth DIL switch of the upper switching block S1, 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 1–8 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 10 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").

16

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system DESIGN

Function assignment of the DIL switches

Switching block S1

DIL switch off on

S1.1 Coin channel 1 vacant inhibited
S1.2 Coin channel 2 vacant inhibited
S1.3 Coin channel 3 vacant inhibited
S1.4 Coin channel 4 vacant inhibited
S1.5 Coin channel 5 vacant inhibited
S1.6 Coin channel 6 vacant inhibited
S1.7 Product sale in case of overpay exact price

S1.8

Switching block S2

DIL switch off on

S2.1 Coin channel 7 vacant inhibited
S2.2 Coin channel 8 vacant inhibited
S2.3 Coin channel 9 vacant inhibited
S2.4 Coin channel 10 vacant inhibited
S2.5 Coin channel 11 vacant inhibited
S2.6 Coin channel 12 vacant inhibited
S2.7 Operation normal teach mode
S2.8 Operation control –

Switches/button, additional PCB disabled enabled

S1

S2

S3

S1

S2

S3

Switching block S3

DIL switch off on

S3.1 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

S3.10 Memory block 0 1

S1

S2

S3

National Rejectors, Inc. GmbH, Buxtehude

17

DESIGN G-18.mft with vending machine control system

Light-emitting diode (on coin validator)

The light-emitting diode (LED) 7 (see Fig. 1a) 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 1 is switched
active (see section "Selecting memory block" in Chap. 7 "Operation").

18

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system DESIGN

Interfaces (on coin validator)

On the rear of the coin validator there is a 6-pole 8 and a 14-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 10-pole MDB interface 5. (See Fig. 1a)

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-18.mft is operated as a 1-5-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. 10 "Technical data").

For further information on the MDB interface, please refer to "NAMA
document MDB/ICP, 2.0" (www.vending.org).
For 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-18.mft is equipped at the bottom
with a PCB direct plug (see Fig. 1a), 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?").

For details regarding pin assignment, see section "Pin assignment
and connection diagrams" in Chap. 10 "Technical data".

National Rejectors, Inc. GmbH, Buxtehude

19

DESIGN G-18.mft with vending machine control system

Label

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:

1

17

1 Channel data – memory block 0

2 Date of manufacture

3 Currency – memory block 1

4 Currency – memory block 2

5 Channel data – memory block 1

6 Device type

7 Data block number

8 Revision no. for data block download

9 Nominal voltage

10 Bar code

11 Ordering code/order no./

consecutive device no. per order number

2

3 4

Fig. 1b: Label – G-18.mft

56 7 8

1213141516

12 Coin outlet , since without sorting

device, always "3"

13 Coin signal line

G-18.mft with vending machine control
system

14 Very narrow coin channel

15 Narrow coin channel

16 Normal coin channel

17 Coin type

, not relevant for

9
10
11

20

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system DESIGN

The additional control PCB

8a 8b 8c 8d 8e

7

Fig. 1c: Design – additional control PCB

1a Interface (14-pole) – G-18.mft

1b Interface (6-pole) – G-18.mft

2 DIL switch 1 (lower) and

2 (upper)

3 Button

4 Interface – escrow

5 Interface – return mechanism

6 Interface – battery

Interfaces (additional control PCB)

On the additional control PCB, there are, in addition to the two interfaces 1a
and 1b to the coin validator, all the interfaces 4 to 8 to the vending machine
components that are relevant for the control system (see Fig. 1c).

For details regarding pin assignment, see section "Pin assignment
and connection diagrams" in Chap. 10 "Technical data".

1a 1b

6

45

7 Interface – selection buttons and pilot

lights in vending machine door

8a Interface – product ejector 1

8b Interface – product ejector 2

8c Interface – product ejector 3

8d Interface – product ejector 4

8e Interface – product ejector 5

12

2
3

Button and switches (additional control PCB)

Button 3 is used to perform an automatic run of the vending machine
functions such as escrow, selection buttons, pilot lights, product ejectors
and motorized return mechanism before starting up the device (see Chap. 6
"Starting up") and to reset the error messages stored in the coin validator
that inhibit the further acceptance of coins or disable the selection buttons
(see Chap. 11 "Troubleshooting").

The lower of the two DIL switches 2 is used for the manual testing of all
contacts of the vending functions such as escrow, selection buttons,
product ejectors and motorized return mechanism (see Chap. 11
"Troubleshooting").

The upper DIL switch can be used to set up to five prices for up to five
different products (see section "Set the prices" in Chap. 6 "Starting up").

The button and switches can be disabled for normal operation (see
section "Disabling price and test switches/button in Chap. 7
"Operation").

National Rejectors, Inc. GmbH, Buxtehude

21

DESIGN G-18.mft with vending machine control system

Pilot lights (vending machine door)

The two pilot lights (LEDs) controlled via the additional PCB (connector 7,
Fig. 1c) in the vending machine door are supposed to make it easier for the
customer to operate the vending machine in normal operation. However,
these LEDs also tell the service technician that there is a malfunction and
what kind of malfunction it is. Accordingly, the green LED is used during a
correct selling sequence and the red LED in the event of a malfunction or an
error during the selling sequence (cp. also section "Status and error
messages of the pilot lights in the machine door" in Chap. 8 "Maintenance
and service"):

green LED flashes,

as soon as the inserted credit is sufficient for a purchase:

• in case of setting "exact price“,
as soon as a set price is reached and the respective chute is not
empty

• in case of setting "overpay“,
as soon as the lowest set price is reached

red LED flashes, when coins are inserted although the acceptance of coins

is inhibited, because:

• credit has already reached the highest set price

• all chutes are empty or defective

• malfunction in the escrow

red LED flashes, when a selection button is pressed, because:

• in case of setting "exact price", credit is not equal to price

• in case of setting "overpay", credit is less than the price of the
selected product

• chute of the selected product is empty or defective

green and red LED flash alternately whenever the coin validator is not in the

normal operating mode but in the service mode instead, so that no coins can
be accepted in order to generate a credit (e.g. in the test mode or during the
price-setting operation).

22

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system FUNCTIONS

5 Functions

This chapter describes the functions of the coin validator:

• Coin acceptance

• Coin channels and memory blocks

• Accepted coin sensors

• Prices

• Control of the vending machine functions

• "Battery empty" detection

• Inhibiting of specific coin types

• Teach mode (optional)

• Communication with MDB periphery (optional)

Only the functions will be described in this chapter. To find out how to change
adjustable functions, refer to Chap. 7 "Operation" regarding settings made
directly on the changer, and refer to the separate instructions regarding
settings made using the configuration software WinEMP or PalmEMP (cp.
also Chap. 9 "Which functions can be set using WinEMP/PalmEMP?").

Coin acceptance

A coin inserted into the coin validator initially runs past inductive and optical
sensors for the purpose of an inspection in order to measure its coin
properties such as the alloy, diameter, mass and minting. An upper limit and
a lower limit are stored for each programmed coin type, a so-called
acceptance band, so that the coin validator knows whether to accept a coin
or not. If the determined measured values of the inserted coin are beyond the
acceptance band, the coin detected as being a false coin exits the coin
validator via the coin return area. Otherwise, the acceptance gate opens,
and after passing the accepted coin sensors, the coin is initially directed into
the escrow of the vending machine.

The acceptance bands are programmed by the manufacturer according to
customer specifications, but they can be changed using the configuration
software (see Chap. 9 "Which functions can be set using the WinEMP/
PalmEMP?").

National Rejectors, Inc. GmbH, Buxtehude

23

FUNCTIONS G-18.mft with vending machine control system

Coin channels and memory blocks

For the purpose of coin acceptance, the coin validator possesses 12 "memory
slots" that can be assigned different coin types or tokens. These "memory
slots" are termed coin channels. All the coin information that describes the
processing of an inserted coin is assigned to the coin channels; e.g. the
acceptance band of a coin type/token so that the coin type/token is accepted
in that channel.

To be able to reject false coins reliably, channels with a narrow or even a very
narrow acceptance band are frequently set up for a coin type, in addition to
the standard coin channel. The limit values of these coin channels are closer
to one another so that false coins with similar measured values are rejected.
Narrow and very narrow coin channels, however, also possess a lower
acceptance rate.

In addition, it is possible to allocate coins with different measured values but
identical coin values to different coin channels. This is how the coin validator
can, for example, accept old and new coins of the same type.

However, a coin channel is not only assigned the acceptance band of a coin
type but also other coin information which defines further processing: e.g.
coin values and inhibiting information.

The memory of the coin validator can data-manage two separately
programmed (memory) blocks 0 and 1 (see section "Label" in Chap. 4
"Design"). The 12 coin channels can be assigned independently of one
another to each block with different coin types (also currencies), inhibiting
information, etc. Only one block can be active at a time and be used for the
coin measurement and for further coin processing. You can use the
switching blocks on the rear of the device to select the desired block (see
section "Selecting memory block" in Chap. 7 "Operation").

Since the customer-specific programming made by the manufacturer does
not allocate all 12 coin channels of memory block 0 and 1 in most cases,
coin types and the desired further information can be assigned to channels
that are still free at any time using the configuration software (see Chap. 9
"Which functions can be set using WinEMP/PalmEMP?").

The coin channels 7 to 12 of the two memory blocks are intended for the
teach mode. New coin types/tokens can be taught in teach mode directly at
the vending machine without using any further tools (see section "Teaching
coin channels in teach mode" in Chap. 7 "Operation").

24

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system FUNCTIONS

Accepted coin sensors

To ensure that accepted coins actually arrive in the escrow and that coin
acceptance has not been tampered with, accepted coin sensors located in
front of the coin outlet check whether the inserted coin drops unhindered into
the cash-box chute. Only when the coin has passed this checking function
is the coin considered accepted.

If the accepted coin sensors are continuously covered, e.g. by a coin jam,
coin acceptance is inhibited.

Prices

Up to five prices for up to five different products can be set in the coin validator
(see section "Set the prices" in Chap. 6 "Starting up").

All prices are set to EUR 1.00 by the manufacturer.

Sale

Following the acceptance of coins, the coins are initially directed into the
escrow of the vending machine. Depending whether you select "exact price"
or "overpay" for the selling sequence (see section "Set exact price or
overpay function" in Chap. 6 "Starting up"), the product selection is possible
as soon as

• the inserted credit amounts exactly to the price of the respective

product (the credit must not be less than but also not greater than the
price).

• the inserted credit amounts to or exceeds one price or several prices.

(The residual credit is accepted without allowing the customer to
make another product selection.)

The green pilot light flashes until the goods are given out via the respective
product chute by pressing one of the up to five selection buttons. Now the
accepted coins are directed from the escrow into the cash-box.

If the chute selected by the customer is empty or defective, the red pilot light
flashes and the customer can now press the return lever. The coins are then
directed from the escrow into the return area. The return lever of the coin
validator can be directly operated mechanically or electrically by means of
a motor.

National Rejectors, Inc. GmbH, Buxtehude

25

FUNCTIONS G-18.mft with vending machine control system

"Battery empty" detection

The light-emitting diode on the left-hand side of the coin validator indicates
the voltage state of the battery when the return lever is pressed following the
insertion of a coin (see section "Displaying battery voltage" in Chap. 8
"Maintenance and service").

Inhibiting of specific coin types

If specific coin types are no longer to be accepted for payment at the vending
machine (e.g. because there are too many false coins of a specific coin type
in circulation), these coin types can be inhibited using the switching blocks
on the rear of the coin validator (see section "Inhibiting coins" in Chap. 7
"Operation").

Teach mode (optional)

The coin validator provides six memory locations (coin channels) for
configuring a maximum number of six new coins/tokens, which means that
coin/token measured values can be re-assigned directly on the vending
machine by inserting the respective coins/tokens. The acceptance band
generated then accepts these tokens as payment in the vending machine.
(See section "Teaching coin channels in teach mode" in Chap. 7 "Operation")

Communication with MDB periphery (optional)

If the coin validator is supposed to control external devices using the MDB
protocol, an NRI card reader and NRI display can be connected using the
10-pole MDB interface on the rear of the device and using an MDB cable set
(see section "Accessories" in Chap. 10 "Technical data").

26

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system STARTING UP

6 Starting up

The G-18.mft is either

• started up in a vending machine, or

• connected to one of the two NRI software solutions used to configure

the device:
– PC programming station (WinEMP)
– Palm handheld (PalmEMP)

Starting up in the vending machine

To start up the device you must:

• Fasten and connect the coin validator and additional control PCB in

the vending machine

• Activate a test run of the vending machine components to be

controlled

• Set prices

• Select "exact price" or "overpay"

Install coin validator and additional control PCB

1 Interrupt the voltage supply of the vending machine.
2 Set DIL switch 9 of the lower switching block S3 to

the lower position (OFF).
The MDB protocol for the vending machine control
system has been selected.

3 Set DIL switch 8 of the middle switching block S2

also to the lower position (OFF).
Master operation for any connected slaves has
been selected.

4 Connect both enclosed ribbon cables to the 14-pole

and 6-pole interfaces (3 and 4, Fig. 2a) of the coin validator.

If MDB slave devices are to be connected to the coin validator,
connect the MDB cable set to the 10-pole MDB interface 2 of the
coin validator (see Fig. 2a).

5 Hang the coin validator in the vending machine mount using the

lateral mounting studs 1 (see Fig. 2a).

National Rejectors, Inc. GmbH, Buxtehude

27

STARTING UP G-18.mft with vending machine control system

Fig. 2a: Interfaces on the coin validator

11a 11b 11c 11d 11e

10

1

2

3

4

5

1

6a 6b

9

12

28

78

Fig. 2b: Interfaces on the additional control PCB

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system STARTING UP

6 Fasten the additional control PCB on its installation plate next to the coin

validator in the vending machine so that it is easily accessible in the case
of any service work.

7 Use both enclosed ribbon cables to connect the coin validator to the

14-pole and 6-pole coin validator interfaces (6a and 6b, Fig. 2b) of
the additional control PCB.

8 Connect the vending machine battery as well as all other vending

machine components to the additional control PCB (see Fig. 2b):
– Battery to interface 9
– Escrow to interface 7
– Motorized return mechanism to interface 8
– Selection buttons and pilot lights from vending machine door to

interface 10

– 1–5 product ejectors to interfaces 11a–11e

For details regarding pin assignment, see section "Pin assignment
and connection diagrams" in Chap. 10 "Technical data".

If necessary, use the MDB cable set to connect the coin validator to
slave devices.

9 Restore power supply to the vending machine.

10 Perform test run (see next section).

National Rejectors, Inc. GmbH, Buxtehude

29

STARTING UP G-18.mft with vending machine control system

Perform test run

The automatic test run must be performed to ensure that the coin validator
"learns" and stores which vending machine components were connected
and must be controlled. Starting from the test run, all interfaces that have not
been assigned, e.g. only three and not all five product ejector interfaces, are
considered "not available". In addition, all components driven by a motor are
moved into their final position or initial position.

The handing-out of goods is only simulated if the chutes are empty.

1 Unhook the coin validator and set the eighth

DIL switch of the upper switching block on
the rear of the device upward to ON.
The operating elements on the additional
control PCB are no longer inhibited and can now be operated.

2 Hang the coin validator back in the machine.
3 Insert a coin into the coin validator.

The coin validator is now in the wake-up mode and no longer in the
sleep mode.

4 Press button 3 on the additional control PCB (see Fig. 2c).

The coin validator is now in the test mode and no longer in the
operating mode and activates an automatic test run in the following
order: return mechanism, escrow – return mechanism, escrow –
cash-box, product ejectors 1–5, green LED, red LED, acoustic signal

30

12

Fig. 2c: Button and switches on the additional control PCB

3

5 If the operating elements on the additional control PCB are to be inhibited

in normal operation, unhook the coin validator again, set the eighth DIL
switch of the upper switching block S1 downward again (to OFF) and
hang the coin validator back in the vending machine.

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system STARTING UP

Set the prices

The up to five prices are set by the manufacturer to EUR 1.00 and can be
set individually with the help of the upper DIL switch 2 on the additional
control PCB by inserting a coin (see Fig. 2c):

1 First unhook the coin validator and set the

eighth DIL switch of the upper switching
block on the rear of the device upward to
ON.
The operating elements on the additional control PCB are no longer
inhibited and can now be operated.

2 Hang the coin validator back in the machine.
3 Use a pointed object to set the upper DIL switch leftward to ON.

The flashing green and red LEDs indicate that the coin validator is no
longer in the operating mode.

4 Insert coins until their value amounts to the desired price for chute 1.

Only the coins added by the coin validator drop into the escrow.
Rejected coins must therefore be inserted again.

If the wrong coins were inserted, the price-setting operation can be
interrupted at any time by pressing the return button.

5 Confirm the price by pressing the selection button for chute 1.

All evaluated coins are paid out.

6 Add up the paid-out coins and, to be on the safe side, compare with

the desired price again.

If the value is not equivalent to the desired price, not all inserted
coins were accepted or added. In that case, the price-setting
operation must be repeated.

7 Repeat steps 4 to 6 for all installed chutes.
8 Set the upper DIL switch rightward again (to OFF).

The LEDs stop flashing. The coin validator is in operating mode
again.

9 If the operating elements on the additional control PCB are to be inhibited

in normal operation, unhook the coin validator again, set the eighth DIL
switch of the upper switching block S1 downward again (to OFF) and
hang the coin validator back in the vending machine.

National Rejectors, Inc. GmbH, Buxtehude

31

STARTING UP G-18.mft with vending machine control system

Set exact price or overpay mode

1 De-energize the coin validator and remove from the vending

machine.

2 Set the DIL switch 7 of the upper switching block S1 on the rear of

the device upward to ON for "exact price" or downward (to OFF) for
"overpay".

"Exact price" activated "Overpay" activated

3 Hang the coin validator back in the machine again and supply with

voltage.

32

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system STARTING UP

Connecting the device environment of the PC programming station (WinEMP)

If you want the G-18.mft to be set on the PC using the diagnostics and
configuration software WinEMP, the following device environment is
connected to the PCB direct plug 5 of the coin validator (see Fig. 2a and
section "Accessories" in Chap. 10 "Technical data"):

• Tester for voltage supply

• WinEMP card reader incl. chip card

Fig. 3: Device environment for WinEMP

For details on how to connect the device environment to your PC and how
to operate the software, please refer to the separate documentation for the
WinEMP software (refer also to Chap. 9 "Which functions can be set using
WinEMP/PalmEMP?").

Prior to making the connection to the programming station,
the DIL switch S3.9 on the rear of the coin validator must be
set upward to ON first, since otherwise it will not be possible
to set up a connection to the PC.

The WinEMP functions that are relevant for the vending machine
control system of the G-18.mft are currently being revised.

Connecting the Palm handheld (PalmEMP)

"PalmEMP" is an NRI program
that can be installed as an
additional application on a
Palm handheld. Simply use the
appropriate dongle to connect
the Palm handheld to the PCB
direct plug 5 of the coin validator
(see Fig. 2a and section
"Accessories" in Chap. 10
"Technical data"). The coin
validator remains installed in
the vending machine.

The PalmEMP
functions that are
relevant for the vending machine control system of the G-18.mft are
currently being revised.

National Rejectors, Inc. GmbH, Buxtehude

33

OPERATION G-18.mft with vending machine control system

7 Operation

In this chapter you will find out how to carry out functions and settings,
directly on the coin validator using the operating elements (switching blocks
and LEDs), rather than with additional tools.

• Inhibit coins

• Select memory block

• Disable price and test switches/button

• Display battery voltage

• Teach coin channels in teach mode (optional)

Inhibiting coins

Using the first six DIL switches of the two upper switching blocks S1 and S2,
each of the 12 coin channels or each coin type assigned to a specific coin
channel can be inhibited individually, i.e. this coin type is not accepted for
payment on the vending machine.

Please refer to the label of the device to see which coin type has been
assigned to which coin channel by the manufacturer.

This assignment can be reset at any time using the NRI software
WinEMP or PalmEMP.

If all coin types are to be accepted for payment at the vending machine, DIL
switches 1–6 of the two upper switching blocks S1 and S2 are in the lower
OFF position. If you want to inhibit a coin channel, you only need to set the
respective DIL switch upward to ON.

The 12 DIL switches inhibit the following coin channels:

34

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system OPERATION

Switching block S1

DIL switch off on

S1.1 Coin channel 1 vacant inhibited
S1.2 Coin channel 2 vacant inhibited
S1.3 Coin channel 3 vacant inhibited
S1.4 Coin channel 4 vacant inhibited
S1.5 Coin channel 5 vacant inhibited

S1.6 Coin channel 6 vacant inhibited

Switching block S2

DIL switch off on

S2.1 Coin channel 7 vacant inhibited
S2.2 Coin channel 8 vacant inhibited
S2.3 Coin channel 9 vacant inhibited
S2.4 Coin channel 10 vacant inhibited
S2.5 Coin channel 11 vacant inhibited

S2.6 Coin channel 12 vacant inhibited

Example

(the coin validator is no longer supposed to accept the coin(s) assigned to coin
channels 3 and 8, which means that coin channels 3 and 8 must be inhibited)

S1

S2

S3

S1

S2

S3

With the DIL switches in these positions, the coin validator no longer accepts the
coin type(s) assigned to coin channels 3 and 8!

To inhibit a coin channel or the coin type assigned to the coin channel:

1 De-energize the coin validator.
2 Inhibit the desired coin channels using the DIL switches 1 to 6 of the

two upper switching blocks S1 and S2 on the rear of the device
(cp. example above).

3 Restore the supply voltage of the coin validator.

If a normal coin channel and a narrow coin channel have been
programmed on the coin validator for one coin type, the normal coin
channel must be inhibited as described above in order to activate
the narrow coin channel. If both channels are activated, the wider
acceptance band of the normal coin channel is used.
If the coin type is to be inhibited, both coin channels must be
inhibited.

National Rejectors, Inc. GmbH, Buxtehude

35

OPERATION G-18.mft with vending machine control system

Selecting memory block

The coin validator has two memory blocks, which have been programmed
according to customer-specific requirements by the manufacturer. The
data of the two blocks 0 and 1 differs in device operation, e.g. by the
acceptance of different coin types. If the coin validator is supposed to
access the other memory and, e.g., accept coin combination 1 instead of
coin combination 2, DIL switch 10 of the lower switching block S3 on the
rear of the device can be used to select the correct block.

To change the memory block:

1 De-energize the coin validator.
2 Set the DIL switch 10 of the lower switching block S3 downward to

OFF if the coin validator is supposed to access block 0 or upward to
ON for block 1.

Block 0 activated Block 1 activated

The LED on the left side of the coin validator lights up briefly.

3 Restore the supply voltage of the coin validator.

Disabling price and test switches/button

If the operating elements on the additional control PCB are to be inhibited so
that they can no longer be operated unintentionally or by anyone, the price
and test switches/button can be disabled using the upper switching block S1
on the rear of the device:

1 De-energize the coin validator.
2 Set the DIL switch 8 of the upper switching

block S1 downward to OFF.

3 Restore the supply voltage of the coin validator.

The operating elements on the additional control PCB are inhibited.

36

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system OPERATION

Teaching coin channels in teach mode (optional)

Coin channels can also be taught without the configuration software directly
on the coin validator using the middle switching block S2, which means that
a coin type or also a token is re-assigned to a coin channel by inserting the
respective coins/tokens and that the coin validator does not need to be
removed from the vending machine. It is also possible to widen the
acceptance band of the selected coin channel when, e.g., only a small
number of tokens are available. Six coin channels (7 to 12) are available to
be taught.

The teach mode is optional. The coin channels must be prepared by
the manufacturer in order to be able to teach new coins and tokens.

The middle switching block S2 on the rear of the coin validator is assigned
in the teach mode as follows:

Switching block S2

DIL switch off on

S2.1 Coin channel 7 – teach S2.2 Coin channel 8 – teach S2.3 Coin channel 9 – teach S2.4 Coin channel 10 – teach S2.5 Coin channel 11 – teach S2.6 Coin channel 12 – teach

S2.7 Teach mode switch off switch on

National Rejectors, Inc. GmbH, Buxtehude

37

OPERATION G-18.mft with vending machine control system

To re-assign a coin type/token to a coin channel, please proceed as follows:

When you use the middle switching block in normal operation in
order to inhibit coins remember the current switch settings so that
you can restore them easily afterwards.

1 Set DIL switches S2.1–6 downward to OFF.

2 Set DIL switch S2.7 upward to ON.

Now the device is in teach mode to teach
the coin channels.

3 Enable the coin channel to be taught (7–12,

here: 9) by setting the appropriate DIL switch
(S2.1–6, here: S2.3) upward to ON.

4 Insert at least 10 coins of the new coin type/token into the coin

validator or vending machine.
After the 10th coin has been inserted, the LED on the left-hand side of
the coin validator lights up briefly. Additional coins can be inserted.

If the LED does not light up after the 10th coin has been inserted,
the inserted coins cannot be used. To abort the operation, first set
the DIL switch of the respective coin channel (here: S2.3) and then
S2.7 downward to OFF.

Now you can save the measured values generated by the inserted coins in
either a normal (a) or a wide (b) acceptance band. A wide acceptance band
is only an appropriate choice when you only have a limited selection of coins
at your disposal for the purpose of teaching tokens and would still like to
program greater tolerance limits.

To save with the normal acceptance band:

5a Set DIL switch S2.7 downward to OFF.

The LED on the left-hand side of the coin
validator will light up once if the saving
operation has been successful and it will
light up twice if there has been an error during the saving operation.

To abort the operation, first set the DIL switch of the respective coin
channel (here: S2.3) and then S2.7 downward to OFF.

38

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system OPERATION

To save with a wide acceptance band:

5b Set an additional unassigned DIL switch

(S2.1–6, here: S2.4) upward to ON.
The acceptance band has been widened.

Now you can set DIL switch S2.7 downward
to OFF.
The LED on the left-hand side of the coin
validator will light up once if the saving
operation has been successful and it will light up twice if there has been
an error during the saving operation.

To abort the operation, first set the DIL switch of the respective coin
channel (here: S2.3) and then S2.7 downward to OFF.

6 Set DIL switch (S2.1–6, here: S2.3) for the

taught coin channel downward to OFF.
The new coin type/token will now be
accepted for payment by the coin validator.

7 Set DIL switches S2.1–6 back to the desired position for the normal

operating mode (cp. also section "Inhibiting coins" in this chapter).

National Rejectors, Inc. GmbH, Buxtehude

39

MAINTENANCE AND SERVICE G-18.mft with vending machine control system

8 Maintenance and service

In this chapter you will out how to

• clean the G-18.mft,

• indicate the battery voltage using the light-emitting diodes on the
validator,

• test the vending machine components to be controlled manually,

• interpret status and error messages of the pilot lights in the machine
door or clear faults,

• remedy the cause of other malfunctions.

Cleaning coin validator

The coin validator must only be wiped clean from time to time with a damp
cloth (lukewarm water with a small amount of washing-up liquid): Beyond
that, no further maintenance work is required.

Under no circumstances may the cloth be so wet that fluid
runs into the device. Otherwise the PCB will be damaged.
Do not use any solvents or scouring agents that will attack the
plastic material of the device.

1 De-energize the coin validator.
2 Carefully open the flight deck 1 on the left-hand side and hold it open

(see Fig. 4).

3 Use a cloth to wipe off the coin runway inside the coin validator.
4 Close the flight deck again.
5 Provide the coin validator with voltage again.

1

40

Fig. 4: Opening the flight deck

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system MAINTENANCE AND SERVICE

Displaying battery voltage

The light-emitting diode (LED) on the left-hand side of the coin validator can
be used to display the actual voltage of battery:

1 Insert a coin into the coin validator.

The coin validator is now in the wake-up mode and no longer in the
sleep mode.

If the coin is inserted at too low battery voltage, the coin is no longer
accepted.

2 Keep the return lever pressed down.

The LED now indicates one of the following voltage states of the
battery:

LED flashes and does not light up Battery voltage max.

LED flashes 2 times per second Battery voltage no longer max.

3 times per second Battery voltage continues to drop
.

.

.

11 times per second Battery voltage almost min.

LED lights up constantly Battery voltage min.

3 Release the return lever.

National Rejectors, Inc. GmbH, Buxtehude

41

MAINTENANCE AND SERVICE G-18.mft with vending machine control system

Testing escrow, selection buttons, product ejectors, motorized return mechanism manually

If there is a malfunction in the vending machine components to be controlled,
you can use the lower DIL switch on the additional control PCB and perform
the respective function to determine whether the individual contacts are still
intact:

1 If necessary, unhook the coin validator and

set the eighth DIL switch of the upper
switching block on the rear of the device
upward to ON (only if the operating elements
on the additional control PCB are disabled).

2 Hang the coin validator back in the machine.
3 Insert a coin into the coin validator.

The device is now in the wake-up mode.

4 Use a pointed object to set the lower DIL switch 1on the additional

control PCB (see Fig. 5) leftward to ON.
The flashing green and red LEDs indicate that the coin validator is no
longer in the operating mode.

5 Perform the function of the supposedly defective component

(e.g. press selection button or return button).
If the electrical contacts are still intact, you will hear an acoustic
signal.

6 Set the lower DIL switch 1 rightward again (to OFF).

The LEDs stop flashing. The coin validator is in operating mode
again.

7 If necessary, unhook the coin validator again and set the eighth DIL

switch of the upper switching block S1 downward again (to OFF) and
hang the coin validator back in the vending machine. (Only if the
operating elements on the additional control PCB are to be disabled)

42

12

Fig. 5: Button and switches on the additional control PCB

8 If necessary, repair or replace the component.

National Rejectors, Inc. GmbH, Buxtehude

3

G-18.mft with vending machine control system MAINTENANCE AND SERVICE

Status and error messages of the pilot lights in the machine door

The two pilot lights (LEDs) in the vending machine door that are controlled
via the additional PCB are supposed to make it easier for the customer to
operate the vending machine in normal operation. However, these LEDs
also tell the service technician that there is a malfunction and what kind of
malfunction it is. Accordingly, the green LED is used during a correct selling
sequence and the red LED in the event of a malfunction or an error during
the selling sequence:

LED

green LED

is flashing

red LED

is flashing

Meaning

Credit sufficient for purchase

Upon coin insertion

(coin acceptance inhibited)

• Credit has reached the highest
price

• All chutes are empty/defective

• Malfunction in the escrow/
motorized return mechanism

Upon pressing the selection
button

• Credit not sufficient for purchase

• Chute is empty/defective

Troubleshooting

No error, press selection button or
insert additional coins for more
expensive product

• No error, do not insert any more
coins and press selection button

• Fill the chutes or reset the error
by activating the automatic test
run (see Chap. 6 "Starting up")

• Reset the error by activating the
automatic test run (see Chap. 6
"Starting up")

• No error, insert additional coins
(with "exact price", until credit =
price; with "overpay", until credit

≥≥

≥ price) and press selection

≥≥

button

• Fill the chute or reset the error by
activating the automatic test run
(see Chap. 6 "Starting up")

green and

red LED

are flashing

National Rejectors, Inc. GmbH, Buxtehude

Coin validator is in the service
mode and not in the operating
mode

No error, set DIL switch on
additional control PCB back again
(to OFF)

43

MAINTENANCE AND SERVICE G-18.mft with vending machine control system

Troubleshooting

Malfunctions can occur in all electronic devices. These do not always have
to be faults in the device. In many cases the reason is improper connections
or incorrect settings. Therefore: please first of all check, whether the
malfunction can simply be remedied using the following table.

44

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system MAINTENANCE AND SERVICE

Problem

Coin
validator
does not
accept coin

Possible causes

No power supply

Return lever pressed/
got stuck

Coin runway dirty

Coin inhibited

Remedy, hints

• Connect machine battery to additional
control PCB and ribbon cable to control
PCB and validator correctly (see section
"Install coin validator and additional
control PCB" in Chap. 6 "Starting up")

• Check battery voltage (see section
"Displaying battery voltage" in this
chapter), if necessary, replace battery

Make sure, that return lever is not
inadvertently pressed

Open flight deck and clean coin runway
(see section "Cleaning coin validator" in this
chapter)

Make sure, that the coin is not inhibited
using the DIL switches on the rear of the
device or not only the narrow coin channel
is enabled and the normal one is inhibited
(see section "Inhibiting coins" in Chap. 7
"Operation")

Coin
validator
accepts
coin, but no
credit is
given

LED on the
left of the
validator is
on

Coin does not exit the
device

Make sure, that the coin outlet is not
jammed by foreign objects or devices
connected to the bottom of the coin
validator

• Battery voltage too

• Replace battery

low

• Validator is loading
new memory block

• No error, LED goes out, as soon as
memory block selected has completely
been loaded

If the malfunction cannot be remedied, you can use the NRI testers

• G-19.0594 (for power supply of 220/230 V, ordering code 11801)/

• G-19.0651 (for power supply of 110/115 V, ordering code 21410)

to test the signal lines of the connecting cable.

To remedy other faults please contact our service technicians.

National Rejectors, Inc. GmbH, Buxtehude

45

WINEMP/PALMEMP G-18.mft with vending machine control system

9 Which functions can be set using

WinEMP/PalmEMP?

The NRI software solutions WinEMP or PalmEMP serve the purpose of
diagnosing and configuring NRI coin validators as well as updating the data
blocks in the device memory.

WinEMP is PC software and part of a programming station for the workshop.
For more information, please see the section "Accessories" in Chap. 10
"Technical data".

PalmEMP is software which can be installed as an additional application on
a Palm handheld. If the Palm handheld is linked to the coin validator via a
dongle (see section "Accessories" in Chap. 10 "Technical data"), the
G-18.mft can be directly configured on site inside the vending machine.

Both programs identify the connected coin validator and its device-own data
and present them on the screen of your PC or on the Palm handheld display
for the purpose of inspection or configuration.

The device functions listed below can be set using WinEMP/PalmEMP (see
separate software instructions).

• Optimize acceptance of genuine coins and rejection of false coins
(acceptance band adjustment following the insertion of genuine coins
and false coins)

• Prices

• Not installed chutes

• Smallest coin value
(as a reference value and basis of calculation for all coin values)

• New coins/tokens
(creating a new acceptance band and assigning a coin value)

• Data block download for current coin information

The WinEMP and PalmEMP functions that are relevant for the
vending machine control system of the G-18.mft are currently being
revised.

46

National Rejectors, Inc. GmbH, Buxtehude

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system TECHNICAL DATA

10 Technical data

The G-18.mft is designed in accordance with the BDTA standard:

Supply voltage 9 V/12 V battery

Current consumption

U

= 9 V Sleep mode: approx. 10 µA

nom

U

= 12 V Sleep-Mode: approx. 13 µA

nom

Temperature range -25 °C to 70 °C

Standby mode: approx. 40 mA (wake-up mode)
Coin acceptance: approx. 370 mA (for approx. 35 ms)

approx. 145 mA (for approx. 300 ms)

Standby-Mode: approx. 40 mA
Münzannahme: approx. 320 mA (for approx. 35 ms)

approx. 120 mA (for approx. 300 ms)

Temperature change Max. 0.2 °C/min.

Rel. humidity Up to 93 %

Condensation Short, rare, and slight condensation permitted

Machine interface Aditional control PCB

for pin assignment see section "Pin assignment and
connection diagrams" in this chapter

Coin acceptance Max. 24 coin in 2 x 12 channels

Coin diameter: 29,5 mm (optionally up to 32.5 mm)
Coin thickness: 2,6 mm (optionally up to 3.5 mm)
Speed: 2 coins/sec.

Device dimensions Height: 185.7 mm

Width: 126.7 mm
Depth: 49.5 mm (57 mm with pressed return lever)
(all mounting dimensions according to BDTA standard,
see section "Mounting dimensions" in this chapter)

Mounting position Vertical, max. deviation: ± 2°

Mark of conformity CE (see next section)

National Rejectors, Inc. GmbH, Buxtehude

47

TECHNICAL DATA G-18.mft with vending machine control system

CE certification

The CE certificate (CE = Communautés Européennes) confirms
that our products comply with specified basic requirements of
the applicable directive. The CE certificate is not a quality
assurance certificate in terms of the quality expected by the
manufacturer but only in terms of the quality demanded legally. It is a pure
administrative certificate and is intended only as proof of compliance with
the directives for the monitoring authorities and not directed at clients or final
customers.

Which directives were applied can be seen in the declaration of conformity.
The manufacturer must keep this declaration available for the monitoring
authorities only (for a minimum period of 10 years after the last product has
been introduced to the market). However, upon request we can provide
copies of this declaration for our customers.

The following directives and their subsequent changes can be partially
applied to our devices:

1. The EMC Directive (89/336/EEC)
for devices which cause electromagnetic interference or are interfered
with by such.

2. The Low Voltage Directive (73/23/EEC)
for electrical operating means which are used with a nominal voltage
of between 50 and 1000 V AC and 75–1500 V DC.

3. The CE Certificate Labelling Directive (93/68/EEC)
Modification directive regarding the application and use of CE labels.

48

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system TECHNICAL DATA

Mounting dimensions

TheG-18.mft is designed in accordance with the BDTA standard, also
compare:

• Mounting dimensions according to DTG standard 1.3 (30/09/88) in

"BDTA-Norm Münzprüfer, Abschnitt B, „Batteriebetriebener Münz­prüfer“ (Dez. 2000)" and

• Mounting dimensions according to DTG standard 1.1 (18/06/02) in

"BTA-Standard, MDB-Schnittstelle für batteriebetriebene Münzprüfer,
Version 1.0 (Nov. 2003)"

The following drawing shows the mounting dimensions of the manufacturer­specific connection field on the rear validator cover:

6

70.8

11.2

8

40.5

4.6

5.5

24

29

39.05

49.3

10.8

1.2

28.8

34

13.1

23.8

7.7

21

11

23

National Rejectors, Inc. GmbH, Buxtehude

75

49

TECHNICAL DATA G-18.mft with vending machine control system

Pin assignment and connection diagrams for ...

For the connection of the G-18.mft to the vending machine components to
be controlled and to the optional MDB periphery, the following pages will
provide you with information on the pin assignment and connection diagrams
of the interfaces on the additional control PCB as well as of the 10-pole MDB
interface on the rear of the coin validator.

1a 1b 1c 1d 1e

5

Fig. 6: Vending machine interfaces on the additional control PCB

... Product ejectors 1–5 (1a–1e, Fig. 6)

Pin 1 MOT1–MOT5 +
Pin 2 MOT1–MOT5 GND
Pin 3 Switch GND
Pin 4 E1–E5 (no
Pin 5 E1–E5 (no

normally open

normally open

, in final position closed)

)

... Escrow (2, Fig. 6)

Pin 1 MOT + (+ >> cash-box)
Pin 2 MOT -
Pin 3 Switch GND
Pin 4 E1 (no
Pin 5 E1 (no

normally open

normally open

), left switch from rear

), right switch from rear

4

12

23

5

1

5

1

... Motorized return mechanism (3, Fig. 6)

Pin 1 MOT +
Pin 2 MOT GND
Pin 3 Switch GND
Pin 4 E (no

normally open

, in final position closed)

Pin 5 –

... Battery (4, Fig. 6)

Pin 1 BAT GND
Pin 2 BAT +

50

B

National Rejectors, Inc. GmbH, Buxtehude

5

1

2

1

G-18.mft with vending machine control system TECHNICAL DATA

... Selection buttons, pilot lights, return button (vending machine door)

(5, Fig. 6)

Pin 1 GND
Pin 2 SB1
Pin 3 SB2
Pin 4 SB3
Pin 5 SB4
Pin 6 SB5
Pin 7 Return button
Pin 8 LED1 +
Pin 9 LED2 +
Pin 10 GND

... MDB periphery (10-pole)

Pin 1 0 V supply
Pin 2 –
Pin 3 Master receive
Pin 4 0 V supply
Pin 5 Master transmit
Pin 6 Switch line for WinEMP/PalmEMP software
Pin 7 Wake-up line (active low)
Pin 8 + 5 V (I
Pin 9 –
Pin 10 12 V DC supply

10 mA)

max

10

1

12

109

National Rejectors, Inc. GmbH, Buxtehude

51

TECHNICAL DATA G-18.mft with vending machine control system

Accessories

To adapt the coin validator to suit your individual needs, you can acquire the
following accessories from NRI:

Configuration software

To enable you to react as quickly as possible to new false coins in circulation
at the workshop or on site at the vending machine and to enable you to make
your individual settings, the coin validator can be connected to:

• The NRI PC programming station consisting of:
– Configuration and diagnostics software "WinEMP”, including card

reader and chip card (ordering code 20119 for basic module and
20166 for data block download additional module)

–

either:
Tester G-19.0594/4 for mains voltage of 230 V
(ordering code 11801) or
Tester G-19.0651 for mains voltage of 115 V (ordering code 21410)
or:
Tester G-19.0654 (ordering code 24257) and
24-V DC power pack (ordering code 24684) and
power cable with Euro plug (ordering code 24683) or with USA plug
(ordering code 24853) or power cable with Euro plug and internatio­nal adapter (ordering code 24683 and 22502) as well as
a connecting cable (ordering code 23627)

The tester mentioned last is still being modified for the connection
to the G-18.mft, but it also provides the option of being able to
connect to the WinMDB PC test station (see separate WinMDB
instructions).

• NRI Palm application "PalmEMP” (freeware on NRI homepage)
To be able to connect a Palm handheld m125 and higher to the coin
validator, you need a dongle with the ordering code 23760; for an
m105, a dongle with the ordering code 23761. If you wish to perform
data block downloads with the help of a Palm handheld, you need the
WinEMP software (see above) with PalmEMP download rights
(ordering code 23649), which are stored on the WinEMP chip card.

You can also connect the Palm handheld via the universal dongle
with a 9-pole D-SUB plug (ordering code 23764). However, the Palm
handheld must then be equipped with an interface that can be
connected to the serial HotSync cable (available from PalmTM).

For details regarding which settings can be made with the help of WinEMP
and PalmEMP, please see Chap. 9 "Which functions can be set using
WinEMP/PalmEMP?”. For details on how to carry out these settings, please
refer to the separate software instructions.

52

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system TECHNICAL DATA

Update software

The coin validator is equipped with a microprocessor including a flash
memory. This allows the coin validator operating software to be updated
quickly and without complications.

In order to load new operating software in the coin validator, you need one
of the following alternatives (current operating software available on request):

• NRI PC update station for the workshop, consisting of:

– software "WinFlash” (ordering code 21524)
– tester G-19.0641 for voltage supply of the coin validator (ordering

code 12922)

– programming adapter G-19.0649 (ordering code 20308)

• NRI update solution for on-site programming, consisting of:

– PC software "WinFlash” (ordering code 21524) in order to load the

current firmware from the hard disk of your PC into the flash
prommer

– mobile Flash-Prommer G-55.0350 (ordering code 20308)

For details on how to install and apply WinFlash and flash prommer, please
refer to the respective separate instructions.

GeldKarte card reader and display

If the vending machine is to be converted to coin and card operation, the coin
validator can also take over control of the following MDB periphery in addition
to controlling the vending machine functions:

• MDB GeldKarte card reader

– G-55.8417 "compact module” or

(ordering code differs depending on each model and must be
requested from NRI)

– G-55.8497 "modular design"

(ordering code differs depending on each model and must be
requested from NRI)

• MDB display (ordering code 24030)

The MDB periphery is connected using an MDB cable set (ordering code

24026).

National Rejectors, Inc. GmbH, Buxtehude

53

INDEX G-18.mft with vending machine control system

Index

A

Accentuations in the text 7
Acceptance

band 23, 59

create (new coin) 37
inhibit 34
narrow 20, 24
normal 20, 24

very narrow 20, 24
coins 23, 47
speed 47

Accepted coin sensor 25
Accessories 52
Adapter, WinFlash 53
Additional control PCB

Design 21
install 27

Advantages 9
Angle, mounting position 47
Application, proper 10
Assignment, pins 50

B

Bar code 20
Battery

empty detection 26
pin assignment 50
voltage, display 41

BDTA MDB slave protocol 12
Block 24

definition 59
illustration, label 20
select 36

Button, additional control PCB 21

disable 36

C

Cable set, MDB periphery 53
Card reader 26

ordering code 53

CE

certification 48
directives 48

Channel

definition 59
narrow 20, 24
normal 20, 24

very narrow 20, 24
Chapter summary 7
Charge, electrostatic 11
Cleaning 40
Coin

acceptance 23, 47

band 59

channel

definition 59
narrow 20, 24
normal 20, 24

very narrow 20, 24
diameter 47
insert funnel 15
jam 15
outlet 15
properties 59
rejection 23
runway, clean 40
thickness 47
type 20, 59

inhibit 34

teach 37

Condensation 47
Configuration 46

accessories 52

Conformity declaration 48
Connection

diagram, MDB periphery 51
in the vending machine 27
in the workshop (WinEMP) 33
MDB periphery 53
on the Palm handheld (PalmEMP) 33

54

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system INDEX

Connectors

on additional control PCB 21

pin assignment 50

on coin validator 19

dimensions 49

pin assignment 50
Conventions, instructions 7
Cover, mounting dimensions 49
CP3 25
Credit 25
Currency 20
Current consumption 47

D

Data block

download 59

number 20
Deployment, proper 10
Design 14

additional control PCB 21

coin validator 15
Deviation, mounting position 47
Device

dimensions 47, 49

environment

PalmEMP 33
WinEMP 33

type 20
DIL switches 16

on additional control PCB 21

disable 36
set prices 31
test vending machine components 42

on coin validator

dimensions 49
inhibit coins 34
select exact price/overpay 32

select memory block 36
Dimensions 47, 49
Diode

on coin validator 18

display battery voltage 41

vending machine door 22

pin assignment 51

troubleshooting 43
Disable

switch/button, additional control PCB 36
Discharge, electrostatic 11
Display 26

ordering code 53
Documentation, additional 8

Dongle, PalmEMP 52
Door (vending machine), pin assignment 51
Download, data block 59

E

Ejectors

pin assignment 50

test 42
Electrostatic discharge 11
EMC directive 48
Error remedy 43
Escrow 25

pin assignment 50

test 42
Exact price 25

set 32
External devices 19, 26

ordering code 53

pin assignment 51

F

Firmware update 53
Flash prommer 53
Flight deck, open 40
Functional principle 40
Functions 23

adjustable 46

G

GeldKarte card reader, ordering code 53
General information

chapter 7

coin validator 8

instructions 7
Glossary 59
Guide (chapter contents) 7

National Rejectors, Inc. GmbH, Buxtehude

55

INDEX G-18.mft with vending machine control system

H

Handling 34, 40
Homepage, NRI 8
Humidity 47

I

Inhibit

coins 34

switches/button, additional control PCB 36
Insert funnel 15
Installation 27

in the vending machine 27

in the workshop (WinEMP) 33

MDB periphery 53

on the Palm handheld (PalmEMP) 33
Interfaces

on additional control PCB 21

pin assignment 50

on coin validator 19

dimensions 49

pin assignment 50
Internet pages, NRI 8
Introduction

chapter 7
coin validator 8
instructions 7

J

Jam caused by coins 15

L

Label 20
LED

on coin validator 18

display battery voltage 41

vending machine door 22

pin assignment 51

troubleshooting 43
Liability 10
Light-emitting diode

on coin validator 18

display battery voltage 41

vending machine door 22

pin assignment 51

troubleshooting 43
Limits, acceptance bands 23
Low voltage directive 48

M

Maintenance 40
Malfunction remedy 43, 44
Manuals, additional 8
Manufacture date 20
Mark of conformity 47
Markings in the text 7
MDB

cable set 53
card reader 53
definition 59
display 53
periphery

interface 19

pin assignment 51
Measurement area 15
Measures 47
Memory block 24

definition 59
illustration, label 20
select 36

Motorized return mechanism

pin assignment 50
test 42

Mounting

dimensions 47, 49
position 47

N

Narrow coin channel 20, 24
New coin, teach 37
Nominal voltage 20
Normal coin channel 20, 24
Notes 7
NRI homepage 8

O

Open coin validator 40
Operating

instructions, additional 8
modes, additional 12
software update 53

voltage 47
Operation 34
Order number 20
Ordering code

accessories 52

coin validator 20
Outlet, coins 15
Overpay 25

set 32

56

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system INDEX

P

PalmEMP

adjustable functions 46
connection 33
ordering code 52

PC programming station

adjustable functions 46
connection 33
ordering code 52

PCB

design 21
install 27

Periphery 26

ordering code 53

pin assignment 51
Pictograms in the text 7
Pilot light

on coin validator 18

display battery voltage 41

vending machine door 22

pin assignment 51

troubleshooting 43
Pin assignment 50
Pins

on additional control PCB

assignment 50

on coin validator

assignment 50
Power

consumption 47
supply 47

Price 25

set 31
switch 31

disable 36
Product

ejectors

pin assignment 50

test 42

selection 25

Programming 46

accessories 52
adapter, WinFlash 53
station

adjustable functions 46

connection 33

ordering code 52
Proper use 10

R

Rejection, coins 23
Relative humidity 47
Remaining credit 25
Requests to perform an action 7
Residual credit 25
Return

button 15

pin assignment 51

lever 15

Return mechanism 15

mechanical 15
motorized 15

pin assignment 50

test 42
Revision number for data block download 20
Runway, clean 40

S

S1 protocol 12
Safety instructions 7, 10, 11, 48
Sale 25
Scope of delivery 9
Selection buttons

pin assignment 51
test 42

Selling

operation 25
prices

set 31
Serial number 20
Setting 46

accessories 52

Slave devices 26

interface 19
ordering code 53

pin assignment 51
Standard coin validator 12
Starting up 27

in the vending machine 27

in the workshop (WinEMP) 33

on the Palm handheld (PalmEMP) 33

vending machine components 30
Status messages 43
Summary, chapter contents 7
Supply voltage 47

National Rejectors, Inc. GmbH, Buxtehude

57

INDEX G-18.mft with vending machine control system

Switching block 16

definition 60
on additional control PCB 21

inhibit 36
set prices 31
test vending machine components 42

on coin validator

dimensions 49
inhibit coins 34
select exact price/overpay 32
select memory block 36

Symbols in the text 7

T

Teach

coins 37
mode

description 26

teach coins 37
Technical data 47
Temperature

change 47
range 47

Test

button 21

run, vending machine components 30
Tester, ordering code 52, 53
Text conventions 7
Tilt, mounting position 47
Tokens

definition 60

teach 26, 37
Totalizer 12
Troubleshooting 43, 44

U

Update firmware 53
Use, proper 10

V

Validation area 15
Vending machine door, pin assignment 51
Very narrow coin channel 24

W

WinEMP

adjustable functions 46
connection 33

ordering code 52
WinFlash 53
www.nri.de 8

58

National Rejectors, Inc. GmbH, Buxtehude

G-18.mft with vending machine control system GLOSSARY

Glossary

Acceptance band A range of acceptable measured values of one coin type with

specific → coin properties defined by an upper and lower limit
value.

Block → Memory block

Channel → Coin channel

Coin acceptance band → Acceptance band

Coin channel A coin channel or its → acceptance band serves the purpose

of accepting → coin types with the same → coin properties.
Various functions that describe how an accepted coin is
further-processed (coin value, etc.) are assigned to a coin
channel.

Coin properties Coin properties which are measured when a coin is inserted

into the coin validator. These are e.g. material, thickness,
volume, minting, diameter, mass, hardness, etc.

Coin type One coin type includes all coins for which the → coin

properties agree.

Data block download When updating a data block set (2 data blocks) using WinEMP

or PalmEMP, the data blocks for the connected coin validator
are loaded quickly and easily from the internal hard disk of
your PC or from the Palm handheld into the coin validator. By
doing this, a new data block is stored in → memory block 0
and memory block 1. The new data blocks contain different
configurations of → coin channel data, e.g., current limit
values of the → acceptance bands or other coin information.

MDB Multi Drop Bus. The abbreviation defines a serial interface

specification for an internal communication protocol for
vending machines. You will find detailed information about
the MDB interface in the "NAMA document MDB/ICP, 2.0"
(www.vending.org).

Memory block The coin validator can data-manage two independent coin

configurations using two memory blocks. Twelve individual
→ coin channels are assigned each of these blocks.

National Rejectors, Inc. GmbH, Buxtehude

59

GLOSSARY G-18.mft with vending machine control system

Switching block The coin validator has three switching blocks, which are

located on the rear of the coin validator and incorporate a
number of DIL switches. Each switch has a specific function,
e.g. inhibiting individual → coin channels or switching the →
memory blocks.

Token A token is inserted into the machine as payment instead of

coins in a currency.

60

National Rejectors, Inc. GmbH, Buxtehude