iXT7B
InstallationManual
MAEN095C,2013-09
English
Foreword
Installationmanual foriXT7B
Foreword
All operator panelsare developed to satisfy the demands of human-machine
communication. Built-in functions such as displaying and controlling text,
dynamic indication, time channels, alarm and recipe handling are included.
The operator panel works primarily in an object-oriented way,making it easy to
understand and use. Configuration is carried out on a PC using the iX Developer
configuration tool. The project can then be transferred and stored in the operator
panel itself.
Various types of automation equipment such PLCs, servosor drives can be
connected to the operator panels. In this manual, the term “the controller” refers
to the connected equipment.
This manual explains how to install the operator panel. Please refer to the
iX Developer reference manual for further information.
Order no: MAEN095C
Copyright © 2013-09 Beijer Electronics AB. All rights reserved.
The information in this document is subject to changewithoutnoticeandisprovidedasavailableatthe
time of printing. Beijer Electronics AB, including all its group companies, reserves the right to change any
information without updating this publi catio n. Beijer Electronics AB, including all its group companies,
assumesnoresponsibilityforanyerrorsthatmayappearinthisdocument. Readtheentireinstallation
manual prior to installing and using this equipment. Only qualified personnel may install, operate or repair
this equipment. Beijer Electronics AB, including all its group comp anies, are not responsiblefor modified,
altered or renovatedequipment. Because the equipment has a wide range of applications, users must acquire
the appropriate knowledge to use the equipment properlyintheirspecific applications. Persons responsible
for the application and the equipment must themselves ensure that each application is in compliance with
all relevant requirements,standardsandlegislationinrespecttoconfigurationandsafety. Onlypartsand
accessoriesmanufacturedaccording to specifications set by Beijer Electronics AB, including all its group
companies, may be used.
BEIJER ELECTRONICS AB, INCLUDING ALL ITS GROUP
COMPANIES,SHALL NOT BE LIABLE TO ANYONE FOR ANY
DIRECT, INDIRECT, SPECIAL, INCIDENTALOR CONSEQUENTIAL
DAMAGES RESULTINGFROMTHE INSTALLATION,USE OR
REPAIROF THIS EQUIPMENT, WHETHER ARISING IN TORT,
CONTRACT, OR OTHERWISE. BUYER'S SOLE REMEDY SHALL
BE THE REPAIR,REPLACEMENT, OR REFUND OF PURCHASE
PRICE, AND THE CHOICE OF THE APPLICABLE REMEDY SHALL
BE AT THE SOLE DISCRETION OF BEIJER ELECTRONICS AB,
INCLUDING ALL ITS GROUP COMPANIES.
BeijerElectronics, MAEN095C
Contents
Contents
1 SafetyPrecautions ....................................................... 4
1.1 General ...........................................................
1.2 UL and cUL Installation .........................................
1.3 DuringInstallation ..............................................
1.4 During Use .......................................................
1.5 Service and Maintenance ........................................
1.6 Dismantling and Scrapping .....................................
1.7 Appearance of Air in Touch Screen .............................
2 Installation ............................................................... 7
2.1 Space Requirements .............................................
2.2 Installation Process ..............................................
2.2.1 Connectionstothe Controller ......... .........................
2.2.2 Other ConnectionsandPeripherals ...................... .......
3 Technical Data ........................................................... 11
4 Chemical Resistance .................................................... 13
4.1 Metal Casing .....................................................
4.2 Touch Screen and Overlay .......................................
4.2.1 AutoflexEBA180L ........................... ...................
4.2.2 Touch ScreenSurface . ...........................................
4.2.3 AutoflexEBA180L ........................... ...................
5 Operator Panel Drawings .............................................. 16
5.1 Connectors .......................................................
5.2 Communication Ports ...........................................
5.3 iX T7B Outline ..................................................
6 Additional Installation Tips . . .......................................... 18
6.1 Grounding the Operator Panel .................................
6.2 Ethernet Connection in the Ope
6.3 To Achieve Better EMC Protec
rator Panel ...................
tion .............................
6.4 AmbientTemperature ...........................................
6.5 Safety .............................................................
6.6 Galvanic Isolation ................................................
6.7 Cable and Bus Terminati
on RS485 .............................
9
10
13
14
14
15
15
16
16
17
18
19
21
22
23
24
25
4
4
5
6
6
6
6
7
8
BeijerElectronics, MAEN095C
Safety Precautions
1SafetyPrecautions
Both the installer and the owner and/or operator of the operator panel must read
and understand this installation manual.
1.1 General
• Read the safety precautions carefully.
• Check the delivery for transportati on damage. Ifdamage is found, notify the
supplier as soon as possible.
• Do not use the operator panel in an environment with high explosive hazards.
• The supplier is not responsible for modified, altered or reconstructed
equipment.
• Use only parts and accessories manufactured according to specifications of
the supplier.
• Read the installation and operating instructions carefully before installing,
using or repairing the operator panel.
• Neverallowfluids,metalfilingsorwiringdebristoenteranyopeningsinthe
operator panel. This may cause fire or electrical shock.
• Only qualified personnel may operatethe operato r panel.
• Storing the operator panel where the temperature is lower/higher than
recommended in this manual can cause the LCD display liquid to
congeal/become isotopic.
• The LCD display liquidcontains a powerful irritant. In c ase of skin contact,
wash immediately with plenty of water. In case of eye contact, hold the eye
open,flushwithplentyofwaterandgetmedicalattention.
• Thefiguresinthismanualservesanillustrativepurpose. Becauseofthemany
variables associated with any particular installation, the supplier cannot
assume responsibility for actual use based on the figures.
• The supplier neither guarantees that the operator panel is suitable for your
particular application, nor assumes responsibility for your product design,
installation or operation.
• It is recommended to turn on and shut down the operator panel at least once
before installing any components/cards or beforeconnecting the operator
panel to external devices, like for example serial devices.
1.2 ULandcULInstallation
• This equipment is suitable for use in Class 2 non-hazardous locations only.
[Combinations of equipment in your system are subject to investigation by
the local authority h avingjurisdiction at the timeof installation].
• All devices have to be supplied by a Class 2 power supply.
Warning:
Donotdisconnectequipmentunlesspowerhasbeenremoved ortheareais
knowntobenon-hazardous
BeijerElectronics, MAEN095C
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Safety Precautions
• ForCanada also AVERTISSEMENT – AVANT DE DECONNECTER
L’EQUIPEMENT, COUPER LE COURANT OUS’ASSURER QUE
L‘EMPLACEMENT EST DESIGNE N ON DANGEREUX.
Warning:
OnlyULandcUL approvedexpansionunitsareallowedtobeconnectedto
theportdesignated“EXPANSION”. Atthemoment therearenosuchunits
evaluatedorallowed.
Warning:
Donotreplaceexpansionunit unlesspowerhasbeenswitchedofforthearea
isknowntobenon-hazardous.
• This product contains a battery; this must only be changed in an area known
to be non-hazardous.
• Replace the battery with a BR 2032 battery. Use of another type of battery
may present a risk of fire or explosion.
Warning:
Batterymayexplode ifmistreated. Donotrecharge,d
ofinfire.
isassembleordispose
• Foruse on a flat surface of a type 4X enclosure indoor use only.
• Use75 degree conductors only
• Use copper conductorsonly
• To make wiring connections to the power supply connector,follow the table
with cable and torque specifications below:
Terminal BlockNo. WireSizeAWG TQLb.In.
X1/X100Phoenixconnectors AWG30–12 5–7
X1/X100Anytek connectors AWG24–12 3.5
• ThesedevicesareClass2suppliedprogrammablecontrollers(industrialPCs)
for the use in industrial control equipment and are intended to be (front)
panel mounted (Type 1 and 4x for indoor use only).
1.3 DuringInstallation
• The operator panel is designed for stationaryinstallation on a plane surface,
where the followingconditions are fulfilled:
– no high explosive risks
– no strong magnetic fields
– no direct sunlight
– no large, sudden temperature changes
• Install the product according to the accompanying installationinstructions.
• Ground the product according to the accompanying installation instructions.
• Only qualified personnel may install the operatorpanel.
BeijerElectronics, MAEN095C
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Safety Precautions
• Separate the high voltage, signal and supply cables.
• Make sure that the voltage and polarity of the power source is correct before
connecting the product to the power outlet.
• Peripheralequipment must be appropriate for the application and location.
1.4 DuringUse
• Keep the operator panel clean.
• Emergency stop and other safety functions may not be controlled from the
operator panel.
• Do not use to o much force or sharp objects when touching thekeys,
touchscreen etc.
1.5 ServiceandMaintenance
• Only qualified personnel should carry out repairs.
• The agreed warranty applies.
• Before carryingout any cleaning or maintenance operations, disconnect the
equipment from the electrical supply.
• Clean the display and surrounding front cover with a soft cloth and mild
detergent.
• Replacing the battery incorrectly may result in explosion. Only use batteries
recommended by the supplier. During the warranty period, the battery needs
to be replaced by an authorized Beijer Electronics service center.
1.6 DismantlingandScrapping
• The operator panel or parts thereof shall b
regulations.
• The following components contain s
to health and the environment: lit
display.
hium battery, electrolytic capacitor and
e recycled according to local
ubstances that might be hazardous
1.7 AppearanceofAirinTouchScreen
• Thelayerstructureofthetouchscreencontainsairandinrarecases
appearance of bubbles can arise. This is purely cosmetic and does not affect
any functionality of the panel. The appearance can occur under certain
environmental conditions such as temperature, humidity,and atmospheric
pressure.
BeijerElectronics, MAEN095C
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2Installation
2.1 SpaceRequirements
• Maximum installation plate thickness: 11 mm
• Space requirements in millimeters when installing the operator panel:
100 mm
Installation
50 mm
143
Note:
Thedimensionsonthedrawin
100 mm
204
garenotproportional.
50 mm
100 mm
BeijerElectronics, MAEN095C
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2.2 InstallationProcess
The following is needed:
• A Phillips/slot screwdriver
1.
Unpackand check the delivery. If damage is found, notify the supplier.
Note:
Placetheoperatorpanelonastablesurfaced uring installation.
Droppingthe panelorlettingitfallmaycausedamage.
2.
Usethecutoutdimensionsthatareincludedontheoutlinedrawing,found
in section Operator Panel Drawings and in the Technical Data table, to cut
a correct opening in the cabinet. A separate cut out drawing is available for
download from the Beijer Electronics web site.
3.
Securethe operator panel in position using all the fastening holes and the
provided brackets and screws:
Installation
x 4 0.5 - 1.0 Nm
BeijerElectronics, MAEN095C
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Installation
4.
Connect the cables in the specified order, according to the drawing and steps
below.
Caution:
• Ensurethattheoperatorpaneland thecontrollersystemhavethesameelectrical
grounding(referencevoltagelevel),otherwiseerrors incommunicationmay
occur.
• Theoperatorpanelmustbebroughttoambienttemperaturebeforeitisstarted
up. Ifcondensationforms,ensurethattheoperatorpanelisdrybeforeconnecting
ittothepoweroutlet.
• Ensurethatthe voltageandpolarityofthepowersourceiscorrect.
• Useonlyshieldedcommunication cables.
• Separatehighvoltagecablesfromsignaland supplycables.
B
RS232/
RS422/
RS485
24V DC
C
Power
Controller
24V DC
D
A
Ethernet
– Connect cable A.
– Connect cable B , using an M5 screw anda grounding conductor (as short
as possible) with a cross-section of minimum 2.5 mm
– Connect cable C .
– Connect cable D. The recommended cross-section of the cable is
1.5 mm
5.
Carefully remove the laminated film over the operator panel display, to avoid
2
.
2
.
static electricity that could damage the panel.
2.2.1 Connectionstot
heController
Forinformation about the cables to be used when connecting the operator panel to
the controller, please refer to the help file for the driver in question.
BeijerElectronics, MAEN095C
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Installation
2.2.2 OtherConnectionsandPeripherals
Cables, peripheralequipment and accessories must be suitable for the application
and its environment. For further details or recommendations, please refer to the
supplier.
BeijerElectronics, MAEN095C
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Technical Data
3TechnicalData
Parameter iX T7B
Frontpanel,W×H×D 204×143×7mm
Cutoutdimensions,
W×H
Mountingdepth 43mm(143mm includingclearance)
Standalonemounting VESA75 ×75
Frontpanelseal IP65
Rear panel seal IP 20
Touchscreen
material
Touchscreen
operations
Reverse side
material
Framematerial Powder-coatedaluminum
Weight 1.010kg
Serialportfor
COM1RS232and
COM2RS422/RS485
Serialportfor
COM3RS232and
COM4RS422/RS485
Ethernet 1×10/100/1000Mbit/sand1×10/100Mbit/s. Shielded
USB 3×USBHost2.0,maxoutputcurrent 500mA
Processor Intel®Atom
Externalstorage
media
MemoryRAM 1GB
LED 1×multi-color
Real timeclock Yes(onchip)
Battery LithiumbatterytypeBR2032(or CR2032),exchangeable
Powerconsumption
atratedvoltage
Fuse 3.15ASlow
Powersupply +24VDC(18-32VDC)
Display TFT-LCDwithLEDbacklight. 800 ×480pixels,262kcolors
Activeareaof
display,W ×H
187×126mm
Note: MaximumscrewlengthforVESAmountingis4mm.
Usageoflongerscrewsmay leadtodamage.
Polyesteronglass,resistive.
Overlay: AutoflexEBA180L
1millionfinger touchoperations
Powder-coatedaluminum
9-pinD-subcontactwith RS232RTS/CTS,chassis-mounted
femalewithstandard lockingscrews4-40 UNC
9-pinD-subcontactwith RS232RTS/CTS,chassis-mounted
femalewithstandard lockingscrews4-40 UNC
RJ45
1×SDcard (optional). Onlycompatiblew ith thestandardSD
formatwithup to2GBstoragecapacity.
14W
CE:Thepowersupplym ust conformwiththerequirements
accordingtoIEC60950andIEC 61558-2-4.
ULandcUL:The powersupplymustconformwiththe
requirementsforclassIIpower supplies.
152.4×91.4mm
(1)
.
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Parameter iX T7B
Operating
temperature
Storagetemperature -20°C–+70°C
Relativehumidity 5%–85%n on-condensed
Approvalsand
certifications
(1)
SeesectionChemicalResistancefor moreinformation.
-10°C–+50°C
Informationisavailableonthe website
www.beijerelectronics.com
Technical Data
BeijerElectronics, MAEN095C
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Chemical Resistance
4 ChemicalResistance
4.1 MetalCasing
The frame and c asing material is powder-coated aluminum. This powder paint
withstands exposure to the following chemicals without visible change:
Aceticacid10% Phosphoricacid4%
Citricacid10% Phosphoricacid10%
Diesel Seawater
Distilledwater Sodiumchloride2%
Edibleoil Sodiumchloride20%
Fueloil Sulphuricacid20%
Hydrogenperoxide3% Tapwater
The powder paint shows limited resistance to the f
ollowing chemicals at room
temperature:
Butanol Nitricacid3%
Hydrochloricacid5% Nitricacid10%
Isopropylalcohol Phosphoricacid43%
Na-hypochlorite10% Turpentine
Note:
Ifexposure toanyof theabovechemicalsisdemanded, itisrecommendedtofirsttest
thechemicalinahidden spotofthemetalcasing.
Thepowderpaintshowslittleornoresistancetothefollowingchemicalsatroom
temperature:
Aceticacid,conc. Methyl-ethylketone Toluene
Acetone Nitricacid30% Trichlorethylene
Ammonia5% Phenol Xylene
Ammonia,conc. Sodiumhydroxide5% 97octaneunleadedpetrol
Ethylacetate Sodiumhydroxide30% 98octaneleaded petrol
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Chemical Resistance
4.2 TouchScreenandOverlay
4.2.1 AutoflexEBA180L
Autoflex EBA 180L covers the overlay surrounding the touch screen.
SolventResistance
Autoflex EBA 180L withstandsexposure of more than 24 hours duration under
DIN42115Part2tothefollowingchemicalswithoutvisiblechange:
(1)
(1)
Phosphoricacid(<30%)
SBP60/95
(1)
Wisk
(1)
-
Acetonitrile DieselDowney/Lenor
Ajax/Viminsolution Ethanol Potassiumferricyanide
Alkalicarbonate
solution
Ammonia(<40%)
Aceticacid(<50%) Gumption
Arielpowderin
solution
Bleach
Castoroil Methanol Trichloroaceticacid(<50%)
Causticsoda(<40%)
Cuttingoil Paraffinoil Windex
Cyclohexanol Persilpowderin
Diacetonealcohol Petroleumspirit
(1)
(1)
(1)
(1)
Extremelyf
(1)
aintglossingofthetexture wasnoted.
Glycerine Potassiumhydroxide(<30%)
Glycol PureTurpentine
(1)
Hydrochloricacid(<36%) Sulfuricacid(<10%)
Linseedoil Tomatoketchup
(1)
Nitricacid(<10%) WhiteSpirit
solution
(1)
Autoflex EBA 180L withstands DIN 42 115 Part 2 exposure of up to 1 hour
duration to glacial acetic acid without visiblechange.
Autoflex EBA 180L is not resistant to high pressure steam at over 100 °C or the
following chemicals:
Concent
Conce
ratedmineralacids
ntratedcausticsolution
BeijerElectronics, MAEN095C
Benzyla
lenechloride
Methy
lcohol
14
Chemical Resistance
4.2.2 TouchScreenSurface
The touch screen surfa ce on the operator panel withstands exposure to the
following solvents without vis ible change:
Solvents Time
Acetone 10minutes
Isopropanol 10minutes
Toluene 5 hours
4.2.3 AutoflexEBA180L
It is recommended to use the Autoflex EBA 180Ltouch display protection film,
that can be ordered from Beijer Electronics.
SolventResistance
Autoflex EBA 180L withstandsexposure tothesamechemicalsasAutotexF157or
F207 according to section Autoflex EBA 180L.
OutdoorUse
In common with all polyester based films, AutoflexEBA 180L is not suitable for
use in conditions of long-term exposure to direct sunlight.
BeijerElectronics, MAEN095C
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Operator PanelDrawings
5 OperatorPanelDrawings
5.1 Connectors
1234567
Pos. Connector Description
1 Power supply +24V DC(18-32VDC)
2 COM1/2 CommunicationPorts
3 LAN(Port2) 1×10/100Base-T (shieldedRJ-45)
4 USB 2×USBHost2.0,maxoutputcurrent500mA
5 Headphone HeadphoneConnector
6 LAN(Port1) 1×10/100/1000Base-T(shieldedRJ-45)
7 COM3/4 CommunicationPorts
5.2 CommunicationPorts
Pin
1-
2 RS232 RxD - RS232RxD 3 RS232TxD - RS232TxD 4 - RS422Rx+ - RS422Rx+
5 GND GND GND GND
6-
7 RS232RTS - - RS422RTS+
8 RS232CTS - - RS422RTS9 - RS422Rx- - RS422Rx-
Note:
Inordertoutilizetwocommunicationportsonthesamephysicalport,theY-splitcable
CAB109mustbeused.
DrawingforexternalcableCAB109 (drawing#Z7100-029E)isavailableonthewebsite:
www.beijerelectronics.com
Serialport,9-pin female Serialport,9-pinfemale
COM1 COM2 COM3 COM4
RS422Tx+
RS485Tx+/Rx+
RS422Tx-
RS485Tx-/Rx-
-
-
RS422Tx+
RS485Tx+/Rx+
RS422Tx-
RS485Tx-/Rx-
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5.3 iXT7BOutline
204
Operator PanelDrawings
143
max. 11 mm
7
43
126 99
99
187
Note:
AStepCADfileisavailableonthewebsitewww.beijerelectronics.com
BeijerElectronics, MAEN095C
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Additional Installation Tips
6 AdditionalInstallationTips
When experiencingcommunication problems in for example noisy environments
or when operating close to temperature limits, the following recommendations
are to be noticed.
6.1 GroundingtheOperatorPanel
Door
Operator panel
1
Ferrite core
6
3
2
5
4
Mounting plate in the cabinet
Power supply
24 V DC
5350
The operator panel’s mountingclamps do not provide a secure grounding
connection between the panel and the device cabinet, see 1 in drawing above.
1.
Connect a 2.5 mm
2
wire between the operator panel’s quick-connect plinth
and the panel’s chassis, see 2 in drawing above.
2.
Connect a 6 mm
2
or 4 mm2wire or grounding braid between the operator
panel’s chassis and the closest grounding point on the door,see 3 in drawing
above.
3.
Connect a strong but short grounding braid between the door and the device
cabinet,see 4 in drawing above.
4.
Twist the cables onto the 24 V
cross-section of the cable
DC feed, see 5 in drawing above. Minimum
is 2.5 mm
2
.
2 turns around the ferrite core provide 4 times the suppression of 1 turn.
3 turns around the ferrite
core provide 9 times the suppression of 1 turn.
A ferritecore suppresses disturbances to the 24 V feed, see 6 in drawing above.
BeijerElectronics, MAEN095C
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Additional Installation Tips
Note:
Thegroundingwiresshould beshortandtheconductor shouldhavealargearea.
Along,thingroundingwirehasaveryhigh impedance(resistance)athighfrequencies
andwillnotguidedisturbancestotheground.
Multi-wireconductorsarebetterthansinglewireconductorswiththesamearea.
Abraidedconductorwire withthesameareais evenbetter. Thebest isashort,thick
groundingbraid.
6.2 EthernetConnectioninthe OperatorPanel
Industrial Ethernet
RJ45
RJ45
1
RJ45
RJ45
Operator panel
Shielded
0.1 μF
250 V
RJ45
3
4
1-1
2-2
3-3
8-8
Short and
unshielded
5
Operator panel
RJ45
Operator panel
RJ45
Operator panel
RJ45
2
In some industrial unitsfor Ethernet, the RJ45 contact’s shield is connected to the
chassis via a capacitor, see 1 in drawing above.
The operator panel’s Ethernet shield is directly connected to the chassis, see 2 in
drawing above.
1.
Check whether the other Ethernet unit has its shield directly grounded or
grounded via a capacitor.
Note:
Inmanycases,connectingthe shieldedEthernetcablingtothe chassisatbothendsis
inappropriate. Humorgroundingloops canoccur. Unshieldedcablingmayevenresult
infewercommunicationerrors.
BeijerElectronics, MAEN095C
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Additional Installation Tips
A good solution may be to use a shielded Ethernet cable, but to connect the shield
at one end only.
One option is tobreak the shield, see 3 in drawing above.
A more elegant methodis to expand the shielded Ethernet cabling with a piece of
unshielded Ethernet cable, see 4 in drawing above.
The shield can be grounded via an external 0.1 μF/250 V plastic capacitor, see 5 in
drawing above. Thiswill connect the HF transients to ground.
BeijerElectronics, MAEN095C
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Additional Installation Tips
6.3 ToAchieveBetterEMCProtection
• Initially, use theoriginal cabling from Beijer Electronics primarily.
• Useshielded cables for RS232 communication.
• Usetwisted pair and shielded cabling for RS422 and RS485.
• Usethe cabling intended for the bus type; Ethernet, Profibus, CC-Link,
CAN, Device Net etc.
• Install and connect according to applicable specifications for the relevant bus
standard.
• Useshielded cabling for Ethernet,preferably with foil and a braided shield.
• D-sub covers should be shielded, andthe shield should be connected to the
cover 360° where the cable enters.
• Connect the shield at bothends.
Shielded cable
0.1 μF/250 V
Ground plane 1 Ground plane 2
Ground plate Ground plate in another building
Not same potential
With longer distances, there is a risk that the ground potential may
In that case, the shield should only be connected at one end. A good
is to connect the other end of the shield to the ground via a
capacitor. Both ends are then connected to the ground in
connected to the g round at one end in terms of LF, thus av
0.1 μF/250 V plastic
terms of HF, but only
oiding the 50/60 Hz
be different.
alternative
grounding loops.
Metal cabinet Metal cabinet
Terminal or connector Terminal or connector
Cable clamp
in steel
Short distance
EMC cable gland
Shielded cable
1.
Usean EMC cable gland or regular plastic cable gland, remove the outer jacket
Shielded cable
Plastic cable gland
andconnecttheshieldtotheinstallation plate with a 360° metal cable clamp.
2.
Place the 24 V DC and communications cabling in one cable trunk/cableduct
and 230/380 V AC in another. If the cables need to be crossed, cross them at
90° only. Avoid combining the cabling for stronger 24 V DC outputs with
the communicationcabling.
Ferritecores that are snapped onto the shielded cabling may remove minor
disturbances. Large ferrite pieces that are snapped onto unshielded cabling and
where the wires go 2-4 times around the cores are approximately 5-25 times more
efficient.
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Additional Installation Tips
6.4 AmbientTemperature
The maximum ambient temperature for the operator panel is provided in the
specifications. The ambient temperature refers to the temperature in the device
cabinet which cools the operator panel’s electronics.
To p
50 °C inside
Operator
panel
30 °C outside
Middle
45 °C inside
Bottom
40 °C inside
Powe r
Powe r
Powe r
Axial fan
120 x 120 mm
Airflow
Inmostcases,theambienttemperaturefortheoperatorpanelissignificantly
higher than the device cabinet’s ambient temperature.
If the cabinet is tall and there are a number of heat-generating devices, the
temperature at the top of the cabinet will be considerably higher than the
theoretical temperature increase that would be expected. All electronics are
sensitivetoheat. Thelifespanofanelectrolyticcapacitoriscutinhalfwithan
8-10 °C increase in temperature. A 15-20 °C temperature increase results in a
quarter of the lifespan etc.
Rittal has a go od program for estimating the anticipated average temperature in
the cabinet as well as a large program for controlling the temperature in the device
cabinet.
2
An enamel-coated steel cabinet has a radiant heat value of 5.5 W/m
and degrees
C.
Installing a fan inside the cabinet will even out the temperature, while moving air
provides considerably better cooling than still air.
Install the fan so that it sits in the cooler area and blows cold air against the operator
panel. If the fan is mounted at the top and sucks warm air upwards, the fan’s
ambient tem peraturewill be higher,resulting in a shorter lifespan.
The operator panel’s loss effect = supply voltage x current. Virtually no power goes
to external users and no loss effects due to inputs.
BeijerElectronics, MAEN095C
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6.5 Safety
Most of the operator panels are fed with 24 V DC.
Power supply
1
2
3
230 V AC to 24 V DC
Power supply
230 V AC to 24 V DC
Power supply
230 V AC to 24 V DC
230 V AC
+24 V
0 V
4
+24 V
0 V
4
Distance?
+24 V
0 V
4
Operator panel
Operator panel
Operator panel
Small controller with expansion unit
COM1
COM100
Ch0
Ch1
Ch100
Ch101
5355
Additional Installation Tips
If a power supply that meets safety standards is used and only feeds the operator
panel, there is no problem. See 1 in drawing above.
However, if a 24 V unit that also feeds other units is used, there is reason to be
cautious, see 2 in drawing above. The operator panel does not have insulation
that meets safety requirements in the event of a potential short circuit between
230 V AC and24 V DC. Itis assumed that the 24 V feed is secure, for example,
SELV according to EN 60950 (protection against electric shock) and UL 950.
Example:
Hereisanexample thatexplainswhyasecure 24VDCfeedcan beruinedbymixing
24Vrelay contactswith230 VACrelaycontactsinasmallercontroller. Check thatthe
clearancesandcreepagedistancesbetween24V DCand230VAC fulfillEN60950or
UL950. Ifnot,input aseparate24V unitintotheoperator panel.
If there is a substa
230 V AC, it is OK t
ntial distance between the relay contacts for 24 V DC and
ousethesame24Vdevicesforallfeeds. See3indrawing
above.
Connect 0 V on the 24 V feed to the ground, see 4 in drawing above. This offers
three advantages:
• Safety is incr
connection o
• Tr a n s i e n ts
• No risk tha
is not unu
eased. The24Vfeedwillnotbeliveintheeventofafaulty
rshortcircuitbetween0V(24V)and230Vphase.
on the 24 V feed are connected to the ground.
t the 24 V feed is at a high level in relationship to the ground. This
sual since there is high static electricity.
BeijerElectronics, MAEN095C
23
6.6 GalvanicIsolation
r
Additional Installation Tips
+24 V DC
0 V
Filter
DC/DC
galvanic isolation
1.5 m
Internal electronic
VCC
0 V (GND)
RS232RS422/485
USB
DC/AC
USB
Ethernet
CFL
The operator panel has galvanic isolation against the 24 V DC feed but no galvanic
isolation between the communication ports for RS232, RS422/485 and USB.
Only the Ethernet connection has galvanic isolation.
Operator panel Modular controller Printe
Power CPU COM COM2
RS422 RS232 USB
* *
**
*
Different ground potential
*
= Internal 0 V (GND) connection
***
*
PCPC
When a PC is connected to the operator panel, the panel’s internal 0 V (GND) will
be connected to the protective ground via the PC.
A number of USB devices can have the shield connected together with the
protective ground. Here, the operator panel’s 0 V (GND) is connected to the
protective ground when, for example, a USB memory stick, keyboard or similar
device is plugged in.
If a number ofunits are connected that have a 0 V and a ground connection, and
these are connected to various grounding po ints, there is a substantial risk of
problems. Grounding currents go through communication cables, the rear plate
of the controller,and internally in the operator panel, and can cause errors.
Use external units to improve communication and achieve galvanic isolation.
Westermo has good industry-standardinsulators that are also insulated from the
24 V DC feed.
Note:
Itisveryimportant tomakesurethatthe24Vfeedintheexternalinsulationunitis not
connectedtoone ofthecommunication outlets. Ifitdoes nothave100% insulation
againstthe24Vfeed,disturbancesandgroundingcurrentsfromthe 0Vonthe24V
sidewilldisruptcommunication.
Usingthistypeofunitsolvesoneproblembut createsalargerp roblem! Asubstandard
installationmayworknow,butproblemsmayarisewhenotherdevicesareconnected.
BeijerElectronics, MAEN095C
24
Additional Installation Tips
6.7 CableandBusTerminationRS485
• If maximum transfer distance and maximum transfer speed is needed,
shielded and twisted pair cable should be used. The mutual capacitance
may not exceed 52.5 pF/m, and thecable area should be at least 0.25 mm
(AWG 24).
• 0 V, the reference voltage for communication should be included in
the cabling. With two-way communication use two pairs; one pair for
communication and one pair for 0 V.
• The shield must be grounded at one end. The other end is usually grounded,
but with longer distancesor when there is a difference in the ground potential,
theshieldshouldbeconnectedtothegroundvia0.1μF/250Vplastic
capacitor to preventground current in the braided shield. A number of
manufacturers recommend that the shield be grounded at each node. Various
manufacturers have different systems for bus termination.
Depending on the recipients’ design, the bus wires may be on the same level or
require pull-up or pull-down to ensure that no faulty signals are detected when the
bus is in resting mode (all transmitters are disconnect ed).
2
BeijerElectronics, MAEN095C
25
Headoffice
BeijerElectronicsAB
Box426
20124Malmö,Sweden
www.beijerelectronics.com/ +4640358600
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