wh Munzprufer Dietmar Trenner EMP 500 Series User manual

wh Münzprüfer Dietmar Trenner GmbH Teltower Damm 276 D - 14167 Berlin
- Version 1.5-
Technical Manual
ELECTRONIC COIN SELECTOR
EMP 500.xx v4

Technical Manual EMP 500.xx v4 wh Münzprüfer Dietmar Trenner GmbH, Germany
Version 1.51
Page 2/27 subject to technical modification EMP500.xx v4
0. Safety Precautions
You are advised to observe the safety information during operation, maintenance and repairing of
electronic coin selectors of the EMP 500 series. Failure to do so may result in warranty and other
claims being excluded.
Whilst every care has been taken in the preparation of information contained in this manual, wh
Münzprüfer will not be liable for any consequential loss or damage howsoever caused.
This manual is protected by copyright and all rights are reserved. Without prior authorisation by wh
Münzprüfer, no part of this manual may be reproduced in any form by photocopy, microfilm or other
processes nor may it be transmitted in any form usable by data processing. The rights of reproduction
by lecture are also reserved.
The Company would be very grateful if any accidental inaccuracies could be pointed out to us with
any other constructive criticism which might lead to a better understanding.

wh Münzprüfer Dietmar Trenner GmbH, Germany Technical Manual EMP 500.xx v4
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Table of Contents
0. Safety Precautions........................................................................................................2
1. Introduction...................................................................................................................4
1.1. Technical Data.............................................................................................................4
1.1.1 The Connectors of the EMP 500.xx ........................................................................4
1.1.2 Technical Overview of the EMP 500.xx v4 ..............................................................6
2. Function of the Coin Selector.......................................................................................7
2.1. Introduction..................................................................................................................7
2.2. Programming of Coins.................................................................................................9
2.2.1. Calibration .........................................................................................................9
2.2.2. Cloning (Programming without Coins)..............................................................12
2.3. Coin Selector Output Signals................................................................................13
2.3.1. Inventory Impulse (Option /I)............................................................................14
2.4. Coin Blocking ............................................................................................................15
2.4.1. General Blocking (Option /M)...........................................................................15
2.4.2. Individual Coin Blocking via DIP switches........................................................15
2.5. Coin Values...............................................................................................................16
2.6. Slave Channels .........................................................................................................18
2.7. Coin Return ...............................................................................................................18
2.8. Safety Features.........................................................................................................18
2.8.1. Coin on a String (Strimming)............................................................................18
2.8.2. Coin Jam.........................................................................................................19
3. The Label ..................................................................................................................19
4. Maintenance..............................................................................................................20
5. EC Conformation Declaration ....................................................................................21
6. Appendix ....................................................................................................................22
7. Applications................................................................................................................26

Technical Manual EMP 500.xx v4 wh Münzprüfer Dietmar Trenner GmbH, Germany
Version 1.51
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1. Introduction
The electronic coin selector EMP 500 has been especially designed for coin-
operated machines in which a mechanical coin selector has traditionally been
fitted. The mechanical dimensions fundamentally correspond to those of our
mechanical coin selector W2000. We offer a full range of front plates to ensure
that no alteration of the front-plate cut-out is required on the machine.
The electrical outputs of the EMP 500 have been especially designed to facilitate
the substitution of mechanical coin selectors, ensuring that only with minimal
technical amendments are required.
The coin selector has an operation voltage of 11 to 24 V AC or DC and is fitted
with switching outputs that – depending on version used – can totally replace the
micro switches or optocouplers of the mechanical coin selectors.
1.1. Technical Data
1.1.1 The Connectors of the EMP 500.xx
The EMP 500.xx v4 has 32 in-built coin channels and has 2 output lines. Coin
output assignment to the output lines can be freely programmed.
•EMP 500.00 v4
open collector outputs
30 V, 30 mA, UCEsat < 800 mV
•EMP 500.01 v4
solid state relay outputs
230 V AC, 600 mA
•EMP 500.04
galvanised separated infra-red optocoupler outputs, output transistors
closed in standby
35 V , 20 mA, UCEsat < 100 mV
maximum potential difference = 350 V DC
•EMP 500.12 v4
galvanised separated infra-red optocoupler outputs, output transistors
open in standby
35 V , 30 mA, UCEsat < 1 V
maximum potential difference = 350 V DC
There are 32 available coin channels – 16 master channels and 16 slave
channels. The slave channels can be freely linked to the master channels. They
then always have the same coin value and the same coin outputs as the master
channels. In general, they are used for the wide and narrow settings.
The programming of electronic coin selectors of the series EMP 500 is done via
the serial connector. Our Windows™ PC software wheasy2 or our software
whpocket for the Palm OS®organizer are available for this purpose.
Note: wh Münzprüfer maintains a policy of continuous research and
development and unconditionally reserves the right to technically
modify the EMP 500 v4 series coin selector and the wheasy 2
software / whpocket at any time.

wh Münzprüfer Dietmar Trenner GmbH, Germany Technical Manual EMP 500.xx v4
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The electronic coin selector EMP 500.xx v4 is available with the following front
plates:
Front plate F503 117 x 60 mm (height x width)
Front plate F70.5 92,25 x 57 mm
Front plate F94.5 101 x 88,5 mm
EMP 500 with Front Plate F 70.5
EMP 500 with Front Plate F 503

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1.1.2 Technical Overview of the EMP 500.xx v4
coin acceptance 32 coin channels, 16 master and 16 slave channels
coin blocking Individual coin or group of coins can be blocked through DIP
switches. The 16 switches can be freely assigned to each of the 32
coin channels. Each channel can be assigned two switches.
output signals Two coin output signals, open collector, optocoupler or solid state
relays. Each output line can be freely assigned to any of the 16
master coin channels through programming. Please note that the
number of coin pulses per coin can be freely programmed as well.
output pulse length 50 ms (±2%) to 10 seconds, programmable, pulse / pause interval
programmable.
supply voltage 11 V to 24 V AC / DC
power supply Maximum 0,6 W standby, during coin acceptance 4,5 W for approx.
100 ms
temperature range +10°C to +70 °C
humidity classification according to DIN 40040: F
max. coin sizes diameter: 30 mm
thickness: 3.3 mm
dimensions (without front plate)
height: 77.3 mm
width: 40 mm
depth: 125 mm
Options
/E extended temperature and humidity range
–20°C to +70°C, humidity classification E/D:
/I inventory impulse
/T teach mode (2 coin channels activated)
/U Potential free complete coin blocking via optocoupler to the machine
controller

wh Münzprüfer Dietmar Trenner GmbH, Germany Technical Manual EMP 500.xx v4
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2. Function of the Coin Selector
2.1. Introduction
This chapter gives directions for preparing the EMP 500 v4 for programming.
Please conform to all safety precautions before making changes to the unit.
Please note that all setting / programming of our electronic coin selectors may be
carried out at the factory or by any authorised "wh Münzprüfer Service Centre."
Note: Coin operated machines, as well as coin selectors are dangerous
electrical devices. Always follow proper safety procedures when
working with electrical devices. Please turn the power off before
making or removing connections or otherwise performing work on the
unit.
This manual assumes that the wheasy 2 programming manual and the
programming software are available and that the operator is familiar with them.
References here to wheasy 2 software, are only made relative to its specific
application to the particular coin selector and its functions.
To power up the EMP 500 v4 and the associated PC interface, we strongly
recommend our N 780 power supply for this purpose. The power supply must be
set to the 12 V position for programming and testing the EMP 500 v4. The coin
selector is connected to the dongle (interface converter) with the cable provided
with the software to the N 780 power supply. The dongle is connected to an
available COM port. See figure 1.
As shown in figure 2, the coin selector may also be programmed whilst in situ and
powered by the vending machine. This procedure requires the use of the cable
K518/1800, which is not supplied with the standard wheasy kit.
Figure 1: Connection of the coin selector with the N 780 and the PC
N 780
EMP 500
N 780
K 517

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Figure.2Connection between a coin operated machine (controller), an installed
coin selector and a PC
Note:Every coin selector is fully tested and configured at the factory and is
supplied ready for installation. Please make note of the factory
settings, or alternatively, read and store them on the hard disk before
making changes. The settings could be stored with a file name
incorporating the serial number. The coin selector must be “read out”
first and this procedure is explained in the wheasy 2 manual.
Please also note the information on the coin selector decal.
It is important that the coin selector be located in an upright stance
when programming. Similarly, the bottom surface of the coin selector
needs to be horizontal. This can often be achieved by mounting the
coin selector in the same manner that it is mounted in the vending
machine. Alternatively, wh Münzprüfer can provide you with a
purpose designed stand T 500.
The following sections detail each wheasy 2 related function of the coin selector.
Each function has its own chapter as listed in the table of contents in this manual.
controller
power
EMP 500
K 518

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2.2. Programming of Coins
There are a variety of ways in which the coin acceptance of the EMP 500 v4 may
be programmed.
The coin selector can “learn” new coin parameters, including individual tolerance
requirements, with the help of the Calibration Function. Calibration is carried out
either using the PC based wheasy 2 software or directly in the vending machine
using the Teach mode Function (see On site programming) or using whpocket for
the Palm OS®organizer.
Yet another alternative would be to transfer a previously prepared complete coin
parameter data set from the PC to the coin selector. This is commonly referred to
as the Cloning Function. This method is far less involved than calibration because
it dispenses with the time consuming task of inserting coins. A pre-requisite
however is that an approved and appropriate coin parameter data set is available.
These may be acquired via the internet from wh Münzprüfer.
The wheasy 2 cloning function also allows the transfer of a data set from a factory
set coin selector to any electronic coin selector in the same series. In this way
identical programming may be duplicated for all units, as required, especially for
new currencies.
2.2.1. Calibration
2.2.1.1. Calibration Using wheasy 2
Under the Edit pull down menu is the function “Calibration”. Pressing the <F4> key
can also directly access this window. This will bring up the following window:
Figure 3 Window for selecting the coin channel to be calibrated.
Next, a coin channel to be calibrated is selected. The coin value and currency
code for the selected channel is displayed provided that it has been written to the
file as being programmed to that channel. This is shown next to the channel
number.
Note: The coin description shown is taken from the loaded file for the
particular channel. Specifically, the correct description is shown only
if the correct file for the coin selector has also been loaded.
The calibration window is displayed only after a coin channel has been selected.
The calibration tolerance mode for the chosen channel is also shown, but this may
be changed at any time prior to pressing OK.

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Figure. 4Calibration window for EMP 500 v4 coin selector
The calibration mode “fix” is intended for use with coins and coin channels for
which preset tolerance parameters are available. These parameter sets can be
seen by selecting the menu selection “Coin Overview”. Please refer to the wheasy
2 programming manual for more information, but as a general rule, “fix” provides
the best results when such information is already available.
The coin tolerances are automatically adjusted to the test coin set when “narrow”,
“average” or “broad” are chosen. This makes them particularly appropriate for the
calibration of new coins or tokens in the absence of coin data sets.
Each of the calibration ranges approximates coin acceptance as follows:
narrow approx. 95%,
average approx. 98%,
broad approx. 99%.
Obviously, the actual acceptance rate in a vending application may vary from the
figures above. The level of variation relates directly to just how the coin set used
for calibration is typical of the coins currently in circulation.
The number of inserted coins as well as the overall number of coins required is
shown in the calibration window. The total number of required coins is determined
by the data file. Calibration automatically ends once the required number of coins
have been inserted and the procedure may now be finished or another coin
channel selected for calibration.
2.2.1.2. Calibration Using the Teach Mode Function (Option /T)
The coin selector can be delivered with an optional teach mode function (on site
programming). The teach mode can be set up for a maximum of 14 channels at
the factory. No PC is required for the teach mode, since the necessary software is
built into the coin selector.
The teach mode is activated by setting the number 8 switch (left DIP switch block)
to “ON”. The number 7 switch of the same DIP switch block is used to set the
acceptance tolerance to “broad” or “narrow”. The “ON” setting selects a narrow
tolerance.
To start the calibration it is necessary to select a channel to be calibrated by
setting one channel switch to “ON”. The left DIP switch of the left DIP switch block
corresponds to channel 1 and right DIP switch of the right DIP switch block
corresponds to channel 16.

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The coin channel must be chosen after activation of the teach mode switch 8. The
advantage is that it is not necessary to set all DIP switches to “OFF” first before
programming a particular channel.
Channels 7 and 8 cannot be calibrated with the teach mode because the DIP
switches 7 and 8 are used to set the acceptance tolerance and to activate teach
mode respectively.
Note: Only 15 blocking switches are available on those coin selectors that
have been factory set with the teach mode. The coin selector will not
accept any coins while it is in the teach mode.
Figure 5 below shows the example of setting up channel 15 for calibration with
narrow acceptance tolerances.
Figure 5 Example DIP switch settings for teaching channel 15 with narrow
tolerances.
The following procedure is for coin selectors with activated teach mode (factory
setting):
1. The coin selector is configured, so that only coin channel 15 and 16 may be
used for teaching.
2. The teach mode is activated via blocking switch no. 8 (ON).
3. If blocking switch no. 7is activated additionally (ON), teaching is effected
using narrow tolerances.
4. The blocking switches 15 and 16 are used to teach coin channels 15 and
16. The switches have to be set to the OFF position when activating the teach
mode, otherwise the coin selector software blocks the two channels for the
teach mode.
5. If any coin blocking switches are activated (ON) for channels which are not
released for the teach mode, the coin selector magnet will operate briefly three
times to indicate an incorrect operation.
6. To program the coin selector with the teach mode a minimum of 10 coins or
tokens must be inserted. When the requisite number of coins have been
inserted and the teaching procedure has been completed (by setting the
blocking switch no. 15 or 16 back to the OFF position), the coin selector
magnet will operate briefly and once only.
7. Should the coin selector establish an overlapping of the newly programmed
coin with a coin / token already programmed, then the coin selector magnet
will operate briefly twice and no new data will be stored in the memory of the
selector. If it is not possible to program the new coin / token with the setting
“wide” (inhibit switch number 7 is on OFF), then it is possible to program it in
the narrow setting (inhibit switch 7 is ON).

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8. Insufficient coins being inserted will result in the magnet not operating and
no new data will be stored into the memory of the selector.
9. The teach mode is deactivated via blocking switch no. 8 (OFF). When the
teach mode is deactivated, all blocking switches may then be used for
individual coin blocking with the exception of blocking switch no. 8.
2.2.2. Cloning (Programming without Coins)
Cloning is the fastest way in which to program a coin set. Using this method, coin
parameter sets are transferred into the coin selector from the PC. It is also
possible to transfer a coin parameter set from one coin selector to another thereby
giving it nearly identical acceptance and reject rates. It does not make any
difference whether the cloning data set is a wh original data set or whether it was
copied from a coin selector and stored in the PC.
As a prerequisite to cloning, it is necessary for the coin measuring system of the
originating coin selector to be the same as the measuring system of the target coin
selector. wheasy 2 automatically compares the measuring configuration of the
attached coin selector with the measuring configuration of the coin selector that
produced the coin parameter set. Cloning is only accomplished if the two systems
are indeed the same.
Other data sets are available from wh Münzprüfer if wheasy 2 does not allow
cloning because of a mismatch in the measuring system characteristics.
Cloning can begin once the PC has been loaded with the cloning data set and
when the coin selector has been connected. This function can be accessed by
selecting “EMP cloning” from the “Data” pull down menu or directly by clicking
on the tool bar.
The following window opens up after selecting the function “EMP Cloning“:
Figure. 6 Window “EMP Cloning“
In certain situations it is possible to selectively clone individual channels. This can
be carried out provided that the loaded data file is identical with the name of the
file loaded from the coin selector. This we refer to as selective cloning.

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Selective cloning is useful when the parameters for a specific coin are to be
changed, or maybe a token is to be added. This procedure can also be carried out
with a coin selector that is set up for multiple currencies. For example, should you
need to update the Euro coins while, at the same time, retaining the national
currency you simply select “Only selected coins” and activate the check bottoms
for the Euro coins.
The actual cloning process takes about 15 seconds after the OK button has been
pressed.
2.3. Coin Selector Output Signals
There are 2 parallel coin output channels on the EMP 500 v4. They can be freely
assigned in any combination to the 16 master channels. This means that each coin
channel can have multiple output channels and that the number of pulses can be
freely configured for each coin channel. One and the same output line or a
combination of the output lines can be assigned to several coin channels. The 16
slave channels always have the same output channel(s) as the associated master
channel.
The coin selector signals gives the corresponding number of pulses on the
respective output channel. The pulse widths and the pulse intervals of the coin
output signal can be programmed in the following steps:
50 ms, 100 ms, 200 ms, 500 ms, 1 sec, 2 sec, 5 sec and 10 sec
The pulse timing can be programmed using wheays2 under “configuration” – “B
values” and then via “receipt”.
The programming of the output lines can be done via the menu point “edit” –
“output channels”.
Note: If a coin channel has no output channel programmed to it, then the
coin will be accepted but no accept signal will be generated on the
parallel interface. The EMP 500 v4 has been designed only with
output lines 1 and 2. Other electronic coin selectors have up to 8 coin
output channels (EMP 770, EMP 780, EMP 800).

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Figure 7: Programming Window for the Output Channels
The figure shows the 16 coin channels (horizontally) and the 8 output channels
(vertically). Please note that the EMP 500 v4 only uses two output channels.
The number of coin signals per output channel can be programmed in the column
“Puls”.
The output channel on which the inventory pulse can be given can be chosen on
the “Invent.” line. “Mask” allows you to decide whether the output should be open
or closed in standby. This is essential for the configuration of the infrared
optocoulper output lines.
2.3.1. Inventory Impulse (Option /I)
The EMP 500 v4 may be programmed to release an inventory or credit impulse.
This inventory impulse is intended for the counting and logging of accepted coins.
The impulse length and impulse pause are separately programmable in the range
of 1 to 255 ms. The factory set standard is an impulse duty factor of 50 ms/50 ms.
Please note that only one specific coin output signal can be used when this option
is chosen.
wheasy 2 can be used to activate “Inventory Impulse“. The checkbox can be found
under “Configuration“, “B-Values” as part of the “Receipt“ dialog box. The value is
set under “Edit”, ”Coin Values” in the field “S.Value”.

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2.4. Coin Blocking
Coin blocking may be accomplished in various ways. One possibility is the general
blocking input line, which will block the coin selector from accepting all coins.
Secondly, it is possible is to block coins or groups of coins individually through 16
DIP blocking switches on the coin selector. The DIP blocking switches are
accessible through a recess in the coin selector cover.
2.4.1. General Blocking (Option /M)
The EMP 500 v4 has a potential-free infrared optocoupler at its disposal for the
general blocking. The inhibit voltage depends on the coin selector hardware and
lies between 12 and 230 V AC/DC. It is standard that the coin selector is blocked
when the infrared optocoupler is powered up. This is known as “general blocking
via low” for the coin selector programming with wheasy2.
The signal polarity of the blocking line is programmable. The programming can be
carried out using wheasy 2 under the menu selection “Configuration“. Select “B-
Values”, select the register tab “Mode.“ This tab, among other things, has a check
box for “Main blocking with 0” and “Main blocking with an open input.” The
following table shows the possible combinations of the above two options.
selected check box Infrared optocoupler input
general blocking
with “0“ general blocking with an open input powered not powered
X
X X
Table 1The function of general blocking in relationship to the programmed
mode of the coin selector
As the EMP 500 v4 has an infrared optocoupler only the two recommended
settings are shown in Table 1.
Note: Please inform us when ordering if the inhibit voltage is to be at 115 V
or 230 V otherwise it must be ensured that on the coin-operated
machine the current is limited from 1 mA to 10 mA.
2.4.2. Individual Coin Blocking via DIP switches
The coin selector has 16 DIP switches for individual coin blocking. Blocking is not
active, that is, the coin will be accepted when the switch is in the “OFF” position. A
coin will be rejected when the switch is “ON”.
The 16 switches can be freely assigned to the 32 coin channels. Each coin
channel can be associated with two switches. This configuration makes it possible
to block individual coins or, if multiple currencies are programmed, it is possible to
block a whole currency with one switch. For example 12 individual coins can be
assigned to the first 12 switches. Then switch 13 to 16 can be used to block whole
currencies. This optimal use of the switches allows the easy selection of one
currency or even multiple currencies at the same time.
The following figure illustrates the assignment of blocking switches and also the
numeric identity of each switch.

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Figure. 8Blocking assignment.
The lower switch position is the “Off“ position. The upper switch position denotes
“ON”. In this. example all coins (and channels) assigned to switch 7, 8 and 15 are
blocked.
The programming of the blocking switches is done with wheasy 2 and is explained
in the wheasy 2 technical manual.
2.5. Coin Values
Each coin programmed into the coin selector is also given a coin value. This value
may be used for the inventory impulses. Most importantly programming the coin
values display a check on what is already programmed in coin selector including
channel assignments.
16 different coin values can be programmed into the master channels. The slave
channels always have the same coin value as the master channel.
The “Coin Values“ selection is available under the “Edit“ pull down menu. This
window can be used to set and edit the coin values for each channel. Please note
that only part of the information in this window is transferred to the coin selector.
The rest is just stored as part of the data on the PC and is used to better describe
and understand each channel while working with wheasy 2.
Figure. 9 Window for “Coin Values”

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The individual fields are defined as follows:
•S.Value (Calculated Coin value)
A calculated coin value is the value transferred to the coin selector. The
calculated coin value represents the inventory value.
•Value (Actual coin value)
This “value” is not stored in the coin selector. In certain situations it may
be necessary to give a coin an S.value other than its face value. For
example, a rebate value may be assigned to a particularly valuable coin.
In this case, the “value” is displayed for clarity when working with wheasy
2.
•Curr. (Currency)
The currency description is not stored in the coin selector. However, it is
still important to have this description when working with wheasy 2
because a coin selector may be programmed to accept multiple
currencies.
•Rem. (Remark)
The remarks are not stored in the coin selector. They serve to provide a
better overview when working with wheasy 2. Supplementary information
such as “broad” or “narrow”, “old” or “new”, or “before 74” or “64-76” etc.
may be entered here.
•TM (Teach mode)
This choice enables the coin selector mounted DIP switch teach mode
function for a channel. This mode is activated when the appropriate box
shows a “√√ “.
From the series v4 onwards a star (*) may be shown to the left of the “TM”
checkbox. The star indicates that this master channel also has a slave channel
associated with it (See section 2.6).
There are some special fields at the bottom of the window, below the heading of
“Scaling.” These adjustable parameters have the following meaning:
•Scaling Factor
This value is used in vending machines that communicate with the coin
selector over the serial MdB protocol. The vending machine may read
these values during a status request. This is not significant for the EMP
500 v4.
•Decimals
A decimal point location is likewise transferred to the vending machine
during a status request as part of the MDB protocol. This value tells the
vending machine how many digits to use after the decimal point as part of
the coin value. This is not significant for the EMP 500 v4.
•Set Value
A set value represents one impulse when inventory pulses are generated.
For those coin selectors that calculate prices and the price is set up via the
binary price switches, the set value is also used as the multiplication
factor.
•Test button
This button is used to let wheasy 2 test whether it is possible to create 8
bit coin values for the MdB status request with the given scaling factor and
decimal location. This is not significant for the EMP 500 v4.

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•Proposal button
wheasy 2 attempts to find a scaling factor and a decimal point position
that works for the status request. It is not possible to find such a value if
the largest coin value is more than 255 times greater than the smallest
coin value. In this case an error message is shown. This is not significant
for the EMP 500 v4.
2.6. Slave Channels
The generation v4 coin selectors also have 16 slave channels (Channels 17 to 32)
available in addition to the so-called 16 master channels. The slave channels can
have their own settings for the coin parameters and blocking switches. The slave
channels may be assigned arbitrarily to any master channels. It is even possible to
assign multiple slave channels (up to 16) to a master channel. The slave channel
assignment can be carried out in wheasy 2 with the “Edit” pull down and then
selecting “Slave channel.” This is discussed in the wheasy 2 manual.
The slave channels share the following attributes with the associated master
channel:
•Output channel. This means that the slave channel will always signal the same
output line as the associated master channel.
•Coin Value
•Sorting shaft
2.7. Coin Return
The coin selector EMP 500 v4 has a feature which will measure and give credit for
a coin, and then return it. This feature can be used, for example with test tokens. It
can also be used where certain persons, for example employees, are to receive
benefits without cost (e.g. car parking).
The setting of this function is also discussed in the wheasy 2 manual in the “Edit”
chapter, under the sub-heading “Sorting Shafts.”
2.8. Safety Features
2.8.1. Coin on a String (Strimming)
Even if the coin selector is in standby mode, the light barriers are still live. If the
light barrier detects a coin in the acceptance channel which has not previously
passed the measuring system in the correct way, the coin selector will assume that
this coin, for which a receipt has been transmitted, is being pulled back on a
thread. Via the parallel interface, the coin selector can give a message for coin-on-
a-thread-detection to the machine. The customer can choose any of the coin
output channels or a combination of channels through which the coin-on-a-thread
detection is to be signalled. This can be programmed by the factory. The
information is emitted by a minimum impulse width of 200 ms. The machine is
able to distinguish between coin-on-a-thread detection and a normal receipt signal,
as it can recognise the different width and (or) identify a combination of
simultaneously arranged coin output lines.
If a coin is still identified in the light barrier after 200 ms have passed, the
information will be repeated. During that time, no coin can be accepted.

wh Münzprüfer Dietmar Trenner GmbH, Germany Technical Manual EMP 500.xx v4
Version 1.51
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2.8.2. Coin Jam
If the measuring system identifies a coin, but measuring is concluded via “timeout”
instead of the correct measuring procedure (coin leaves coin selector passing the
receipt light barrier or the return), this will be interpreted as “coin jamming”.
Via the parallel interface, the coin selector can give a signal for coin jamming to
the machine. The customer can choose any of the coin output channels or a
combination of channels through which coin jamming will be signalled. This can be
programmed by the factory. The information is emitted by a minimum impulse
width of 200 ms. The machine is able to distinguish between coin jamming and a
normal receipt signal, as it can recognise the different width and (or) identify a
combination of simultaneously arranged coin output lines.
The following coin jam signals are possible:
-Coin jam 1 (in the measurement system)
-Coin jam 2 (not used on EMP 500 v4)
-Coin jam 3 (between the measurement system and the acceptance light
barrier)
-Coin jam 4 (in the acceptance light barrier)
-Coin jam 5 (not possible with the EMP 500 v4)
-Coin jam 6 (not used on EMP 500 v4)
If a coin is still identified in the light barrier after 200 ms have passed, the
message will be repeated. During this time, coin acceptance is blocked.
3. The Label
The label of the coin selector has all the necessary information required by the
machine controller such as the output lines and blocking switch configurations.
The following section explains and clarifies the format and legend on the label.
Figure 10 Example of an EMP 500 v4 Label
At the top is printed the exact type of coin selector. In this example:
EMP 500.04 v4

Technical Manual EMP 500.xx v4 wh Münzprüfer Dietmar Trenner GmbH, Germany
Version 1.51
Page 20/27 subject to technical modification EMP500.xx v4
The next line contains the installed options, which are separated by a “/”.
/T Teach mode
/E Extended temperature and humidity range
Along the right margin are the serial number and the week and year of
manufacture. The same information is contained in the bar code.
The remaining space on the label is devoted to the specification of the
programmed coins. These specifications are in the form of a table. The columns
have the following meaning:
Coin type (Value and currency)
Teach mode channels are marked with TKn. „n“ = number of blocking
switch, which has to be used to activate the teach mode for this
channel
Blocking switch for the broad channel
Blocking switch for the narrow channel
Blocking switch for the very narrow channel
Blocking switch for a coin type or coin group (currency)
Output line
4. Maintenance
The EMP 500 v4 is an extraordinarily robust coin selector and operates relatively
maintenance free. However, it should be cleaned at regular intervals especially if it
is operating in an environment with high levels of dust, smoke or nicotine. The
cleaning intervals are of course dependent on the level of air borne contaminants.
Modest use with minimum contaminant levels indicate the need to clean the top of
the coin path once a year. Open the coin path door and wipe the exposed surfaces
with an alcohol moistened cloth. The light sensors may be cleaned with a soft
brush or air spray duster.