SCHEIDT & BACHMANN SV|51 User manual

Edit: Stevens Art.#.: 86 -----, Version: 1.02 Date:13.12.2017
Fare collection
systems
State: December 2017
Customer Documentation
SV|51

Edit: Stevens Art.#.: 86 -----, Version: 1.02 Date:13.12.2017
This manual, including all of its component parts, is copyright protected. Scheidt & Bachmann GmbH
reserves all rights to its contents. Any use not expressly approved by copyright law is subject to prior
approval by Scheidt & Bachmann GmbH. This applies particularly to copying, processing, translations and
microfilming, as well as to storage and data processing in any electronic systems.
All contents of this manual shall be treated confidentially and shall not be transferred to any third party, either
for their own commercial use or for any other client.
Since all information and facts are subject to technical changes, any liability for the data contained is hereby
disclaimed. Modifications of technical details, in terms of information and illustrations are reserved. Make
sure to follow the updating index. Scheidt & Bachmann GmbH cannot be held responsible for direct damage
and/or possible consequential damage due to misuse by the customer or by third parties, unless the Product
Liability Act (ProdHaftG) is concerned. In no event shall Scheidt & Bachmann GmbH be liable for any dam-
age out of or in connection with the provision of the manual.
© 2017 Scheidt & Bachmann GmbH, Fare collection system (FCS)
Breite Straße 132 41238 Mönchengladbach
www.scheidt-bachmann.com
Subject to change.
History
Version Date Change Edit
1.00 09.08.2017 Start Version Stevens
1.01 25.08.2017 Changes to suggestions of system
development
Stevens
1.02 13.12.2017 Changes to suggestions of system
development
Stevens
Table 1-1

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Systeme für
Fahrgeldmanagement
Chapter 1 Introduction and Safety
1.1 SV|51 Description .................................................................................. 1-5
1.1.1 Components ............................................................................................................. 1-5
1.2 Overview................................................................................................. 1-5
1.3 Safety Features...................................................................................... 1-6
1.4 Protective Equipment............................................................................ 1-8
1.5 Special Tools.......................................................................................... 1-8
1.5.1 Warning Symbol....................................................................................................... 1-9
1.5.2 Caution Symbol........................................................................................................ 1-9
1.5.3 Information Symbol.................................................................................................. 1-9
1.5.4 Example Symbol ...................................................................................................... 1-9
1.5.5 Finger Tip Maintenance Symbol ............................................................................. 1-9
1.5.6 Tools Symbol............................................................................................................ 1-9
1.5.7 Electrical Hazard Symbol ...................................................................................... 1-10
1.5.8 Electrostatic Discharge Symbol ........................................................................... 1-10
1.5.9 Hot Hazard Symbol ................................................................................................ 1-10
1.5.10 Maintenance Cycle Symbol................................................................................... 1-10
1.6 Machine Safety Labels ........................................................................ 1-10
1.6.1 Labels On Inside Of Most AFC Enclosures ......................................................... 1-11
1.6.1.1 Model Number Labels.................................................................................... 1-11
1.6.1.2 CE Label ........................................................................................................ 1-11
1.6.1.3 FCC License Label ........................................................................................ 1-11
1.6.1.4 TÜV SÜD NRTL Label ................................................................................... 1-12
1.6.1.5 Electrical Hazard Label .................................................................................. 1-12
1.6.1.6 Hot Surface Label .......................................................................................... 1-13
1.6.1.7 Hand Entanglement/ Rotating Gears Label ................................................... 1-13
Chapter 2 Glossary
2.1 Glossary of Terms and Abbreviations............................................... 2-15
Chapter 3 Declaration of Conformity
3.1 Europe .................................................................................................. 3-29
3.2 USA/CANADA....................................................................................... 3-30

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Chapter 4 Installation and Initialization
4.1 Overview...............................................................................................4-31
4.1.1 Components............................................................................................................ 4-31
4.1.2 Drilling into Concrete ............................................................................................. 4-37
4.1.3 Adhesive Option ..................................................................................................... 4-37
4.1.4 Side Conduit Entry ................................................................................................. 4-38
4.1.5 Bottom Conduit Entry ............................................................................................ 4-38
4.1.6 Bill of Materials....................................................................................................... 4-39
4.1.7 Tools Required ....................................................................................................... 4-39
4.1.8 Mounting the base plate ........................................................................................ 4-40
4.1.8.1 Drilled solution............................................................................................... 4-40
4.1.9 SV|51 Provisioning Prerequisites ......................................................................... 4-49
4.1.9.1 Technical Specifications................................................................................. 4-50
Chapter 5 Module Removal
5.1 Module Removal .................................................................................5-51
5.2 MicroSD Card Removal and Replacement ........................................5-55
5.3 Tools and Consumables .....................................................................5-56
Chapter 6 Preventive Maintenance
6.1 General Maintenance and Cleaning ...................................................6-59
6.2 Materials and Replacement Parts.......................................................6-60
6.2.1 Cleaning and Visual Inspection of Interior........................................................... 6-61
6.2.2 Cleaning and Visual Inspection of Exterior ......................................................... 6-61
6.2.3 Screen .....................................................................................................................6-61
6.2.4 Test for proper adjustment of the Lock Switch................................................... 6-61
Chapter 7 IPC
7.1 IPC Pages .............................................................................................7-63

Chapter 1
Introduction and Safety
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Chapter 1 Introduction and Safety
1.1 SV|51
Description
The SV|51 Station Platform Validator is a device with read and write capabilities
with contactless smartcards. The SV|51 will be floor mounted.
1.1.1 Components The SV|51 is comprised of six main components as shown below (Figure 5):
Base Plate
Power Supply
Stainless steel column with a welded mounting plate at the bottom
Adapter Ring
SV|51 Main Unit
Lock
Figure 1-1 Components
1.2 Overview The Station Fare Transaction Processor Repair and Maintenance Manual
(RMM) provides complete, detailed instructions for operating, maintaining, and
troubleshooting the Station Fare Transaction Processor. Comprehensive charts,
tables, graphs and other diagrams provide a technical document that is easy to
use and understand.
SV|51 Main Unit
Lock
Stainless steel
column
Power Supply
Adapter ring
Base Plate
Power supply mount

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Introduction and Safety
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Full documentation that would be needed by maintenance personnel is available
through Scheidt & Bachmann. The manual assumes that comprehensive repair
procedures will be performed by fully trained contractor technicians.
This manual reflects Scheidt & Bachmann’s commitment to providing our cus-
tomers with comprehensive technical documentation, along with training guide-
lines to augment our customer training program.
PLEASE READ THIS MANUAL AND ALL REFERENCED DOCUMENTS
CAREFULLY BEFORE ATTEMPTING TO INSTALL THIS AFC EQUIPMENT.
FAILURE TO FOLLOW THE INSTRUCTIONS IN THIS MANUAL AND THE
INSTRUCTIONS OR NOTES IN THE INSTALLATION DRAWINGS MAY
CAUSE INJURY TO YOURSELF OR DAMAGE TO THE EQUIPMENT AND
MAY ULTIMATELY COMPROMISE THE OPERABILITY OF THE
EQUIPMENT!
All Automated Fare Collection (AFC) equipment is TÜV-SÜD-NRTL listed. To
continue to be compliant with TÜV-SÜD-NRTL requirements, please note that
the following items need to be performed during installation:
The equipment will remain TÜV-SÜD-NRTL compliant only if the mounting and
wiring are also TÜV-SÜD-NRTL compliant. Please take great care during instal-
lation to comply with TÜV-SÜD-NRTL and NEC requirements.
Ensure compliance with all Safety Regulations and Safety Recommendations.
Although this manual has been prepared with great care, some information may
seem unclear. If so, please feel free to contact us with your remarks or ques-
tions.
Scheidt & Bachmann USA
781 272-1664
DISCLAIMER
Scheidt & Bachmann USA INC. IS NOT LIABLE FOR INJURIES TO ANY
PERSON OR DAMAGE TO THE EQUIPMENT RESULTING FROM FAILURE
TO COMPLY WITH THE MANUFACTURER’S INSTRUCTIONS OR
DOCUMENTATION. THIS DISCLAIMER INCLUDES ALL THIRD PARTY
DOCUMENTATION PREPARED BY OEMS AND PROVIDED AS A
COURTESY BY Scheidt & Bachmann USA INC. TO ITS CUSTOMERS.
FAILURE TO FOLLOW MANUFACTURER’S INSTRUCTIONS MAY
INVALIDATE ANY OR ALL WARRANTIES, EXPRESS OR IMPLIED.
NOTE: NOT ALL OF THESE WARNING LABELS OR HAZARDS MAY EXIST IN ALL
AFC DEVICES. ONLY THOSE LABELS THAT APPLY TO THE STATION
FARE TRANSACTION PROCESSOR, AND ARE REQUIRED TO MEET UL
CERTIFICATION REQUIREMENTS, WILL BE FOUND IN THE STATION
FARE TRANSACTION PROCESSOR. BE CAUTIOUS AND OBSERVANT,
AND LOOK FOR SUCH WARNING LABELS AND POTENTIAL HAZARDS.
ANY TECHNICIAN OR PERSON ACCESSING THE INTERIOR OF ANY AFC
DEVICE SHOULD USE COMMON SENSE AND EXERCISE EXTREME CAU-
TION.
1.3 Safety
Features
Safety engineering is an integral part of Scheidt & Bachmann’s designs. Mainte-
nance technicians must perform maintenance and repair in accordance with
industry safety standards including Federal, Provincial, and Local codes and
regulations.

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Introduction and Safety
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Close attention to proper safety precautions is of the utmost importance. Com-
ponents should be installed, maintained, and repaired only by trained, qualified
personnel using reasonable care. Improper installation, maintenance, or repair
procedures may damage the machine or cause serious personal injury or death.
The following pages provide detailed information on safety precautions that
must be observed when working on AFC Systems. This information should be
carefully read and thoroughly understood before performing routine mainte-
nance or attempting to troubleshoot or repair the machine.
It is the responsibility of the maintenance agency to ensure that the safety
instructions in this manual are read, understood, and implemented by properly
trained maintenance and service technicians. All other persons who work with
the internal systems of any AFC systems should also be trained in safety.
Topics covered in this section include:
1.1 General Safety Guide
1.4 Protective Equipment
1.5 Special Tools
1.2 Use of Symbols in Manual
1.6 Machine Safety Labels
In addition to the safety features listed in this section, which includes
specific UL safety labels, additional UL requirements are shown in these
three drawings included in Chapter 7: Electrical Installation Mains,
Electrical Installation Ethernet, and Mounting Possibilities.

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1.1 General
Safety Guide
This chapter provides the technician with the safety information necessary to
avoid personal injury or equipment damage. Only qualified, trained technicians
using reasonable care should perform maintenance or repair. As with any
mechanical system, the AFC components can pose certain safety hazards. The
following guidelines must be followed when working on the mechanical systems
of any AFC Systems or Components.
Only competent, qualified technicians trained by Scheidt & Bachmann should
service this machine.
Service technicians must read and understand all operating and service
instructions.
Turn electrical power off before opening any electrical enclosure.
Do not operate the machine with the cover of any enclosure, or the guard or
covers over any mechanism, removed.
Due consideration should be given to any safety regulation applicable to the
particular location in which the machine is operating.
Do not turn on power to the machine when components are disconnected.
The machine must not be used for any purpose other than that for which it
was designed and approved by Scheidt & Bachmann.
When servicing or repairing the machine, all machine control panels must be
tagged in compliance with OSHA Lockout/Tagout procedures to indicate that
machine should not be operated.
1.4 Protective
Equipment
The technician should use care when working with solvents and other cleaning
agents that may be abrasive or have a tendency to cause irritation to the skin or
eyes. Read all labels carefully and follow instructions for the use of gloves when
working with chemical fluids.
When using cleaning agents such as fluids or pressurized air, safety glasses
must be worn to prevent eye damage.
1.5 Special Tools There are no special tools required to ensure the safety of the service techni-
cian. However, ESD (Electrostatic Discharge: see paragraph 1.5.8) protection is
required for all procedures involving contact with electrostatic sensitive printed
circuit boards. The use of a standard ESD Safety Wrist Strap is required when
working with electrostatic sensitive printed circuit boards.

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Introduction and Safety
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1.2 Use of
Symbols in
Manual
Symbols for cautions and warnings are used frequently throughout this manual.
Each symbol appears on the left side of the page with the associated text printed
to the right.
There are several different types of symbols that indicate varying levels of safety
hazards. Detailed information on each symbol is provide in this chapter.
It is vital that the technician understand and follow all safety warnings, cautions
and information guidelines when working on AFC Systems.
1.5.1 Warning
Symbol
The Warning Symbol indicates a potential for serious damage to the equipment
or serious injury to the maintenance or service technician. Extreme care should
be used when performing procedures that are preceded by this symbol.
This symbol indicates a WARNING. A detailed description of the particular
hazard will appear next to the symbol in bold, italic print.
1.5.2 Caution Symbol The Caution Symbol indicates a potential for damage to a particular part or func-
tion of the machine. Reasonable care should be used when performing proce-
dures preceded by this symbol.
This symbol indicates a CAUTION. A detailed description of the particular
hazard will appear next to the symbol in bold, italic print.
1.5.3 Information
Symbol
The Information Symbol indicates special information that could be important for
protecting a particular part or function of the machine. Reasonable care should
be used when performing procedures that are preceded by this symbol.
This symbol indicates that more INFORMATION follows. A detailed
description of the particular hazard will appear next to the symbol in bold,
italic print.
1.5.4 Example
Symbol
The Example Symbol precedes an example of a function. The text or illustration
explains one possible function. This explanation applies to all other functions of
the same kind.
This symbol indicates that an EXAMPLE follows.
1.5.5 Finger Tip
Maintenance
Symbol
The Finger Tip Symbol indicates that no tools are required to perform the task
described. Reasonable care should be used when performing procedures that
are preceded by this symbol.
This symbol indicates a FINGER TIP MAINTENANCE action. A step-by-
step description of the task will appear next to the symbol in bold, italic
print.
1.5.6 Tools Symbol The Tools Symbol indicates that tools are required to perform the task described.
Reasonable care should be used when performing procedures that are pre-
ceded by this symbol.

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This symbol indicates a TOOL is required to perform the task described in
the text.
1.5.7 Electrical
Hazard Symbol
The Electrical Hazard Symbol indicates the potential for serious damage to the
machine caused by electrical voltage surges or serious injury to the service tech-
nician caused by electrical shock. Extreme care should be used when perform-
ing procedures preceded by this symbol.
This symbol indicates possibility of ELECTRICAL HAZARD. A detailed
description of the particular hazard will appear next to the symbol in bold,
italic print.
1.5.8 Electrostatic
Discharge
Symbol
The Electrostatic Discharge Symbol indicates the potential for serious damage
to the printed circuit boards or other Electrostatic Discharge (ESD) sensitive
devices in the machine. Extreme care should be used when performing proce-
dures preceded by this symbol. The technician should wear a grounding strap
and use the proper techniques associated with handling printed circuit boards or
other ESD sensitive devices.
This symbol indicates an ESD HAZARD. A detailed description of the
particular hazard will appear next to the symbol in bold, italic print.
1.5.9 Hot Hazard
Symbol
The Hot Hazard Symbol indicates the danger for serious burns caused by sur-
faces within the machine that may be extremely HOT to the touch. Hot surfaces
can cause serious injury to the service technician. Extreme care should be used
when performing procedures preceded by this symbol.
This symbol indicates a RISK OF BURNS. A detailed description of the
particular hazard will appear next to the symbol in bold, italic print.
1.5.10 Maintenance
Cycle Symbol
The maintenance cycle symbol indicates the required maintenance cycles
described in the subsequent part of the manual. An example is shown below.
Time is indicated by month or by quantities of coins or tickets.
1.6 Machine
Safety Labels
The typical AFC device has safety labels on some internal components to alert
service technicians and other personnel that a safety hazard may exist when
working on certain machine subassemblies. Not all safety labels may apply to
service operations on every subassemblies.
A series of different labels is used within the machine. The following paragraphs
describe these labels and note the location within the machine where they will be
found. It is important to read and understand this information thoroughly.
Preventive maintenance cycle: Every 3 months

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1.6.1 Labels On
Inside Of Most
AFC
Enclosures
There are several labels used on the assemblies located on the inside of the typ-
ical AFC device enclosure. These labels and their meanings are described
below.
1.6.1.1 Model Number
Labels
The Model Number Label shown in Figure 1-2 is typically found inside the AFC
device on the floor of the enclosure and also on all main modules. There are
three different types of labels used. This label indicates the drawing or part num-
ber as well as the serial number. The index in brackets after the drawing number
or part number indicates the hardware release. It will be changed in conjunction
with hardware updates, i.e. index “A” will become index “B.”
Figure 1-2 Model Number Labels
1.6.1.2 CE Label The CE label shown in Figure 1-3 appears on the backside of the device.
Figure 1-3 CE Label
1.6.1.3 FCC License
Label
The FCC License label shown in Figure 1-4 appears on the backside of the
device.
Part number
Serial number
Label for products
Label for products
S&B GmbH (option 1).
Label for products
S&B GmbH (option 2).
Part name
Additional Info.
Part number
Serial number
manufactured by
with index manufactured by
S&B USA, Inc.
manufactured by
xxxxxxxxx
xxxxxxx ( )
xxxxxxxxxx
Description
Part No.
Serial No.
Year
Made by:
Scheidt & Bachmann USA
Tested
* *
Made in Germany

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Figure 1-4 FCC-License
1.6.1.4 TÜV SÜD
NRTL Label
The TÜV-SÜD-NRTL label shown in Figure 1-5 appears on the backside of the
device.
Figure 1-5 NRTL-Label
1.6.1.5 Electrical
Hazard Label
The Electrical Hazard label shown in Figure 1-6 appears on or near certain
components located inside the device door and/or enclosure. The label is used
to indicate an electrical hazard such as risk of electrical shock that can cause
serious injury to the technician or observer that fails to observe the warning.
Figure 1-6 Electrical Hazard Label
Special Electrical Hazard Labels are shown in Figure 1-7 and Figure 1-8.
Figure 1-7 located on the customer display inside of the frame of the device.
Figure 1-7 Electrical Hazard Label on the back of most Customer Displays
FCC ID: O5K-NVP
IC: 8312A-NVP
HVIN:SV51

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Figure 1-8 Electrical Hazard Label used for the MEM
1.6.1.6 Hot Surface
Label
The Hot Surface label shown in Figure 1-9 below is used on the heater/blower
unit to indicate the possibility of burns when touching the heater/blower unit. This
label can also be found where other heat or burn hazards may exist.
Figure 1-9 The Hot Surface Label
1.6.1.7 Hand
Entanglement/
RotatingGears
Label
The hand entanglement/rotating gears label is used to indicate an entanglement
hazard (such as the risk of crushing or cutting fingers) that can cause serious
injury to the technician or observer.
Figure 1-10 The Hand Entanglement/ Rotating Gears Label

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Chapter 2
Glossary
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Chapter 2 Glossary
2.1 Glossary of
Terms and
Abbre-
viations
Many terms and abbreviations are used to describe Fare Collection Equipment.
Some are Automated Fare Collection (AFC) industry standard terms, some are
application-specific, such as networking and telecommunications terms, and
some are unique to the customer’s system.
NOTE: The term “TVM” as used in this glossary is synonymous with the term
“FVM” (Fare Vending Machine). The term “TSM” as used in this glossary
refers to any AFC device that sells Tickets. It is an all-inclusive term. TVM
and TSM are standard AFC-industry acronyms. The SSK is a variation of a
TVM.
NOTE: This is a comprehensive glossary that may include items or terms not
used by your transit agency.
A
A See “Ampere”.
AC See “Alternating Current”.
Access Level Individual users of a computer system have
specific access rights that regulate what they
can view or modify. Access rights are organized
into groups, which are called Access Levels.
ADA See “Americans with Disabilities Act”.
AFC Automatic Fare Collection
Alarm Event An alarm event is generally defined as the
unauthorized opening of an AFC machine.
Alarm System A combination of sensors in an AFC machine
that indicates when the unit has been opened
without authorization. May trigger either an
audible or silent alarm, depending on the
machine design.
Alternating Current An electrical current that continuously changes
polarity or direction of flow, usually 50 or 60
times per second
Americans with Disabilities
Act (ADA)
The federal law mandating facility and equip-
ment accessibility requirements for persons
with disabilities.
Ampere A unit of measure of electrical current, the cur-
rent produced by applying one volt to a circuit
with a resistance of one ohm.

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ANSI American National Standards Institute
Application Server NT-based server which runs the Central Com-
puter System Application processes
APTA American Public Transportation Association
ASCII American Standard Code for Information Inter-
change
Audio Speaker A speaker that broadcasts messages in the lan-
guage of choice with content similar to the mes-
sage on the customer display.
AWG American Wire Gauge, a measure of the cross
section of a wire.
B
Bank Account No. Bank account number of an employee
Bank ID No. Bank identification number of an employee
Barcode A barcode is used to encrypt data into a series
of vertical bars (universal product code [UPC]).
It identifies various modules within an AFC
device such as a ticket roll.
Barcode Scanner The Barcode Scanner is a handheld scanner
used to read barcodes (e.g. on replacement
components).
Battery Pack The Battery Pack module supplies 39 VDC if
AFC machine main power is lost.
Bitmap Bit-oriented graphics
Blower Also referred to as a “fan,” the blower cools the
Central Processing Unit (CPU) in the ECU.
Boot Loading of the operating system into the RAM
Byte 1 Byte = 8 Bit
C
CAD/AVL Computer Aided Dispatch/Automatic Vehicle
Locator
Card A credit, debit, stored value, or “smart” card
Card Reader See “Credit Card Reader”.
CCS See “Central Computer System”.
Central Computer System
(CCS)
Centralized company file server that collects
and distributes operating and system fare col-
lection data. The CCS serves all AFC system
connected machines and devices.
Command Instruction to initiate a special transaction

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Command Codes See “Service Command”.
Commuter Rail Server A computer system that acts as a data conduit
between the Central Computer System (CCS)
and the Station Controllers at commuter rail
stations.
COTS “Commercial Off The Shelf “equipment
CPU Central Processing Unit
CRC Cyclic Redundancy Check. Check sum of the
content of the file.
Customer Display The Customer Display is a part of the user
interface. In some AFC machines, it may
include a touch screen.
Customer Specific Value A data field in which the customer is able to
store individualized information.
D
Database A database is an accumulation of individual
pieces of information that are related to each
other.
Database Server The Database Server is the CCS hardware and
software system on which the database is
located.
DC Direct Current
DCM Data Control Module; a flash card used to
update equipment in the field.
Device Type Device type is a term that refers to categories of
AFC equipment, such as FVMs, TOMs, Fare
Gates, MEMs, etc.
Download The process of sending information from a host
to a client, enabling client data to be updated.
Driver Software interface which connects devices to
the operating system.
DTE Diagnostic and Test Equipment
E
Electrostatic Discharge
(ESD)
The Electrostatic Discharge symbol indicates
the potential for serious damage to the printed
circuit boards or other Electrostatic Discharge
(ESD) sensitive devices in the machine.
Grounding precautions must be followed when-
ever this symbol appears.
Element.h The element.h file defines elements in service/
statistic printouts.

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Error Codes Also called an error message, which is gener-
ated automatically when a particular set of
abnormal conditions occurs. Error information
concerning a system fault or equipment mal-
function can be viewed on the Customer Dis-
play, Service Terminal Display, or on a printed
report.
Error Message See “Error Code”.
ESD See “Electrostatic Discharge”.
Event Every action that occurs at or in the TSM is
defined as event.
Exchange Factor Factor needed to convert different currencies.
F
FCC Labels Federal Communications Commission (FCC)
labels that identify the license for the transpon-
der identification system. These labels are
located near each transponder, such as on the
Additional Coin Magazine connection board, in
the Coin Magazine Drawer and beside the Coin
Vault.
File Transfer Protocol
(FTP)
The Internet's file transfer protocol. FTP, which
has been used for more than two decades, is a
standard protocol for accessing files on servers
all over the world.
Filter A Filter selects data under special criterion.
Firmware Computer programs and data loaded into read-
only memory that cannot be modified by the
computer during normal operation and that is
not erased by loss of power.
Flash Card The Flash Card is a memory storage module
(PCMCIA) used for AFC machine initialization
and backup storage.
FTP See “File Transfer Protocol”.
FVM See “Fare Vending Machine”.
G
GHz GigaHertz - a unit of measure of electrical fre-
quency equal to one thousand million (1012)
Hertz (cycles per second).
Graphical User Interface The panel and components through which the
customer interacts with the machine.
GUI See “Graphical User Interface”.

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H
HD Abbreviation for Hard Disk
Heater The heater is located in the bottom of the AFC
machine housing. It provides heat when acti-
vated by a thermal sensor. Also, see Heater/
Blower Unit (HBU).
Heater/Blower Unit The Heater/Blower Unit (HBU) is activated by
an environmental temperature sensor, which is
typically located above the ECU Main Com-
puter. When activated, the HBU blows cool or
warm air (depending on the ambient tempera-
ture) over the interior of the device.
Hexadecimal Numeric system with base 16 (figures from 0 to
15).
HICO Type of write/read head with high field strength.
Hz A unit of measure of electrical frequency, equal
to one cycle per second.
I
I/O Abbreviation for input/output
ID Abbreviation for “Identification Number”
ID Reader Device that reads IDs from magnetic strip
cards.
IEC International Electrotechnical Commission
IEEE Institute of Electrical and Electronic Engineers
Intrusion Alarm In most AFC machines, the intrusion alarm,
which may be audible or silent, monitors the
outer door. The alarm is triggered when an
attempt is made to force open the outer door.
The alarm also triggers when too much time
elapses before entering the security code or
inserting the cylinder lock. Alarm conditions are
also reported to the CCS, which then notifies
designated individuals or parties.
ISDN See “Integrated Services Digital Network”.
ISO International Standards Organization
K
KB Kilobyte (one thousand bytes, where 1 byte
equals 8 bits)
Key Pad See “PIN-pad”.

Chapter 2
Glossary
Edit: Stevens Art.#.: 86 -----, Version: 1.02 Datum:13.12.2017
2-20
Keyboard The keyboard is used by the user to enter data
into the system.
kHz KiloHertz – a measure of frequency equal to
one thousand Hertz (cycles per second)
L
LAN See “Local Area Network”.
Language Marker Displays the language the device is equipped
with.
LCD Liquid Crystal Display; see “LCD Display” .
LCD Panel Part of the FVM Customer Display.
LED Light Emitting Diode
LLRC See “Lowest Level Replaceable Component”.
LLRU See “Lowest Level Replaceable Unit”.
Lmk Check Value The Lmk Check Value images the check sum of
the host security module internal data.
Local Area Network (LAN) A group of interconnected computers located
within the same physical or geographical area
(e.g. within the same building or campus.) See
Wide Area Network.
Locking System See “Door Locks”.
Logical Stock The number used internally by the ticket control
software to identify a physical ticket. The “logi-
cal stock” number may differ from the actual or
“physical stock” number.
Login To get access the system, a login with ID and
password has to be completed.
Lowest Level Replaceable
Component (LLRC)
The most basic component that is normally
replaced in the field
Lowest Level Replaceable
Unit (LLRU)
The most basic unit or assembly that is nor-
mally replaced in the field
LRV Light Rail Vehicle
LUHN-Check The LUHN-check is an international standard
used to protect and proof credit/debit cards.
M
mA Milliampere – a unit of measure of electrical
current equal to one thousandth of an ampere.
An ampere is the current that flows through a
circuit of 1 ohm resistance with a voltage of 1
Volt applied.