Samson Media 7 Service manual

Translation of original instructions
EB 9510 EN
Firmware version 1.02.07
Media7 Differential Pressure Meter
with remote data transmission
Edition September 2018

Note on these mounting and operating instructions
These mounting and operating instructions assist you in mounting and operating the device
safely. The instructions are binding for handling SAMSON devices.
ÎFor the safe and proper use of these instructions, read them carefully and keep them for
later reference.
ÎIf you have any questions about these instructions, contact SAMSON‘s After-sales Service
([e-mail]).
The mounting and operating instructions for the devices are included in
the scope of delivery. The latest documentation is available on our website
at www.samsongroup.com > Service & Support > Downloads >
Documentation.
Denition of signal words
Hazardous situations which, if not avoided,
will result in death or serious injury
Hazardous situations which, if not avoided,
could result in death or serious injury
Property damage message or malfunction
Additional information
Recommended action
DANGER
!
WARNING
!
NOTICE
!
Note
Tip
2 EB 9510 EN

Contents
EB 9510 EN 3
1 Safety instructions and measures ...................................................................5
1.1 Notes on possible severe personal injury .........................................................7
1.2 Notes on possible personal injury ...................................................................8
1.3 Notes on possible property damage..............................................................10
2 Markings on the device ...............................................................................12
2.1 Nameplate ..................................................................................................12
2.2 Article code.................................................................................................14
3 Design and principle of operation ................................................................16
3.1 CongurationusingtheTROVIS-VIEWsoftware .............................................16
3.2 Application .................................................................................................18
3.2.1 Differential pressure measurement .................................................................18
3.2.2 Liquid level measurement..............................................................................18
3.2.3 Device arrangement for liquid level measurement ...........................................19
3.3 Versions ......................................................................................................20
3.3.1 Two-wire version..........................................................................................20
3.3.2 24Vversion................................................................................................20
3.4 Device overview and operating controls.........................................................20
3.5 Accessories .................................................................................................22
3.5.1 Valveblock..................................................................................................22
3.5.2 Further accessories.......................................................................................22
3.6 Technical data .............................................................................................24
3.7 Dimensions in mm........................................................................................29
3.7.1 Dimensions for mounting (mm)......................................................................30
4 Measures for preparation............................................................................31
4.1 Unpacking ..................................................................................................31
4.2 Transporting and lifting ................................................................................31
4.2.1 Transporting ................................................................................................31
4.3 Storage.......................................................................................................31
5 Mounting and start-up.................................................................................32
5.1 Preparation for installation............................................................................32
5.2 MountingtheMedia7device .......................................................................32
5.3 Connecting the measuring lines.....................................................................34
5.4 Electricalconnections ...................................................................................35
5.4.1 Cable glands and terminals ..........................................................................35
5.4.2 Connecting the wiring ..................................................................................36

Contents
4 EB 9510 EN
6 Optional additional function ........................................................................38
6.1 Option modules...........................................................................................39
6.1.1 Nameplate ..................................................................................................39
6.1.2 Slots for option modules ...............................................................................40
6.1.3 Inserting or removing option modules ............................................................42
6.2 GSM module...............................................................................................44
6.2.1 Nameplate ..................................................................................................44
6.2.2 Installing the GSM module............................................................................46
6.2.3 Aligning the antenna....................................................................................48
6.3 Standby power supply (SPS) .........................................................................49
6.3.1 Inserting the battery .....................................................................................50
7 Operation...................................................................................................52
7.1 Capacitive keys............................................................................................52
7.2 Display .......................................................................................................53
7.3 ExamplesfortheoperationoftheMedia7device ..........................................54
8 OperationofMedia7DifferentialPressureMeter .........................................58
8.1 First start-up ................................................................................................58
8.1.1 Runningthestart-upwizard..........................................................................58
8.1.2 Optionmodulewizard .................................................................................60
8.1.3 Setting the user level.....................................................................................60
8.1.4 Performingzerocalibration ..........................................................................61
8.2 Calibrating the measuring range (span).........................................................63
8.3 Remotedatatransmission .............................................................................66
8.3.1 StatusLEDsoftheGSMmodule.....................................................................66
9 Servicing.....................................................................................................67
9.1 Servicingexplosion-protecteddevices............................................................67
9.2 Preparation for return shipment.....................................................................68
9.3 Firmware update..........................................................................................68
10 Malfunctions ...............................................................................................69
11 Decommissioning and removal ....................................................................71
11.1 Decommissioning.........................................................................................71
11.2 Removingthedifferentialpressuremeter ........................................................71
11.3 Disposal......................................................................................................71
12 Annex.........................................................................................................72
12.1 After-sales service........................................................................................72
12.2 Menu structure and parameters.....................................................................73

EB 9510 EN 5
Safety instructions and measures
1 Safety instructions and measures
Intended use
TheMedia7DifferentialPressureMeterisamicroprocessor-controlledtransmitterwithdp
cell for measuring, indicating and transmitting the differential pressure, pressure or measured
variables derived from them. The device is suitable for cryogenic gases, liquids, gases and
vapors.Thedeviceisdesignedtooperateunderexactlydenedconditions(e.g.operating
pressure, process medium, temperature). Therefore, operators must ensure that the device is
onlyusedinoperatingconditionsthatmeetthespecicationsusedforsizingthedeviceatthe
ordering stage.
TheMedia7devicecanbeoperatedinhazardousareasinZone1orhigheronly.The
measurementofammableorexplosivemediaisonlypermittedwiththefollowing
approvals:
−Type5007-1-120x(ATEX):II1/2GExiaIIBT4Ga/Gb
−Type5007-1-121x(IECEx):ExiaIIBT4Ga/Gb(IECEx)
Incaseoperatorsintendtousethedeviceinotherapplicationsorconditionsthanspecied,
contact SAMSON.
SAMSON does not assume any liability for damage resulting from the failure to use the de-
viceforitsintendedpurposeorfordamagecausedbyexternalforcesoranyotherexternal
factors.
ÎRefertothetechnicaldataforlimitsandeldsofapplicationaswellaspossibleuses.
Reasonably foreseeable misuse
TheMedia7DifferentialPressureMeterisnot suitable for the following applications:
−Useoutsidethelimitsdenedduringsizingandbythetechnicaldata
Furthermore, the following activities do not comply with the intended use:
−Use of non-original spare parts
−PerformingmaintenanceactivitiesnotspeciedbySAMSON
Qualicationsofoperatingpersonnel
Thedevicemustbemounted,startedupandservicedbyfullytrainedandqualiedperson-
nel only; the accepted industry codes and practices are to be observed. According to these
mounting and operating instructions, trained personnel refers to individuals who are able to
judgetheworktheyareassignedtoandrecognizepossiblehazardsduetotheirspecialized
training,theirknowledgeandexperienceaswellastheirknowledgeoftheapplicablestan-
dards.

6 EB 9510 EN
Safety instructions and measures
Explosion-protectedversionsofthisdevicemustbeoperatedonlybypersonnelwhohasun-
dergonespecialtrainingorinstructionsorwhoisauthorizedtoworkonexplosion-protected
devicesinhazardousareas.
Personalprotectiveequipment
Werecommendwearingthefollowingprotectiveequipmentdependingontheprocessmedi-
um:
−Protective clothing, gloves, eye protection and respiratory protection in applications with
hot,coldand/orcorrosivemedia
ÎCheck with the plant operator for details on further protective equipment.
Revisionsandothermodications
Revisions,conversionsorothermodicationsoftheproductarenotauthorizedbySAMSON.
Theyareperformedattheuser'sownriskandmayleadtosafetyhazards,forexample.Fur-
thermore, the product may no longer meet the requirements for its intended use. Use of the
device is no longer permitted.
Warning against residual hazards
To avoid personal injury or property damage, operators and operating personnel must pre-
venthazardsthatcouldbecausedinthedevicebytheprocessmediumandoperatingpres-
surebytakingappropriateprecautions.Theymustobserveallhazardstatements,warning
and caution notes in these mounting and operating instructions, especially for installation,
start-up and service work.
Responsibilities of the operator
The operator is responsible for proper operation and compliance with the safety regulations.
Operators are obliged to provide these mounting and operating instructions to the operating
personnel and to instruct them in proper operation. Furthermore, the operator must ensure
thatoperatingpersonnelorthirdpersonsarenotexposedtoanydanger.
Responsibilities of operating personnel
Operating personnel must read and understand these mounting and operating instructions as
wellasthespeciedhazardstatements,warningandcautionnotes.Furthermore,theoperat-
ing personnel must be familiar with the applicable health, safety and accident prevention
regulations and comply with them.

EB 9510 EN 7
Safety instructions and measures
Referenced standards and regulations
DeviceswithaCEmarkingfullltherequirementsoftheDirectives2014/30/EUand
2014/34/EU.Thedeclarationsofconformityareincludedattheendoftheseinstructions.
Referenced documentation
The following documents apply in addition to these mounting and operating instructions:
−Mounting and operating instructions for mounted pipeline valves (strainers, shut-off
valves etc.)
1.1 Notes on possible severe personal injury
DANGER
!
Risk of fatal injury due to the formation of an explosive atmosphere.
Incorrect installation, operation or maintenance of the differential pressure meter in po-
tentiallyexplosiveatmospheresmayleadtoignitionoftheatmosphereandcausedeath,
even with a harmless supply voltage.
ÎFormountingandelectricalinstallationinhazardousareas,observetheexplosion
protection approvals as well as the relevant electrotechnical regulations and the ac-
cidentpreventionregulationsthatapplyinthecountryofuse.EN60079-14applies
inEurope.
ÎDo not connect the supply voltage before mounting is completed and any unused
cable entries have been sealed.
ÎInstallation, operation or maintenance of the differential pressure meter must only
performedbypersonnelwithqualicationsaccordingtoClause4.5ofIEC60079-
14whohasundergonespecialtrainingorinstructionsorwhoisauthorizedtowork
onexplosion-protecteddevicesinhazardousareas.

8 EB 9510 EN
Safety instructions and measures
DANGER
!
Risk of fatal injury as a result of electrostatic discharge at the housing.
ThehousingoftheMedia7deviceismadeofpolycarbonateandmaybecomeelectro-
statically charged when handled improperly. An electric spark generated by electrostat-
icdischargemayleadtoignitionofapotentiallyexplosiveatmosphereandcause
death.
ÎEnsurethatthedevice,cablesandotherplantcomponentscannotrubagainsteach
other.
ÎDonotrubdrythehousingsurfaceoftheMedia7device.
ÎOnly use a damp cloth or wipes (e.g. with diluted mild soap or detergent) to clean
the housing surface.
Riskofburstinginpressureequipment.
ThedpcelloftheMedia7deviceandpipelinesarepressureequipmentaccordingto
Directive2014/68/EU.Improperopeningcanleadtoleakageorburstingofplantor
device components.
ÎBeforestartinganyworkontheMedia7device,depressurizeallplantsectionscon-
cerned and the dp cell.
ÎDrain the process medium from all the plant sections affected as well as the dp cell.
ÎWearprotectiveclothingasspeciedinthematerialsafetydatasheet(MSDS)ofthe
medium used.
1.2 Notes on possible personal injury
WARNING
!
Incorrect electrical connection will render the explosion protection unsafe.
ÎOnly operate the device with an intrinsically safe power supply while complying
withthemaximumpermissiblevaluesforUior U0, lior I0and Pior P0.
ÎAdhere to the terminal assignment and correct polarity.
ÎDo not undo the enameled screws.

EB 9510 EN 9
Safety instructions and measures
WARNING
!
Risk of personal injury due to residual process medium in the dp cell.
Whileworkingonthedpcell,residualprocessmediumcanescapeand,dependingon
its properties, may lead to personal injury, e.g. (chemical) burns.
ÎDrain the process medium from all the plant sections concerned and the dp cell, if
possible.
ÎWearprotectiveclothing,safetyglovesandeyeprotection.
Risk of personal injury due to medium escaping from a damaged dp cell.
Ensurethatallparts(includingthedpcell)thatcomeintocontactwiththeprocess
medium are made of materials with long-term durability.
ÎOnly use process media which, according to their properties, are compatible with
the materials used in the device.
ÎObserve the material numbers listed in the technical data as well as the material
safety data sheets (MSDS) of the process media.
Risk of burn injuries due to hot or cold components and pipelines.
Depending on the process medium, valve components and pipelines may get very hot
or cold and cause burn injuries.
ÎAllow components and pipelines to cool down or heat up.
ÎWearprotectiveclothingandsafetygloves.
ÎDevicesintendedtomeasuregaseousoxygenarelabeledasfollows:
Cleaned and degreased for oxygen according to:
Inspection procedure according to appendix: A.2 and A.3
ISO 23208 - cleaned oxygen
Theseversionsarecleanedandassembledunderspecialconditions.Whenreplac-
ingpartsthatcomeintocontactwithgaseousoxygen,wearsuitableglovesand
make sure that the parts do not come into contact with oil or grease.
ÎWhenreturningdevicesforoxygenserviceforrepair,thesenderassumesfull
responsibility that the devices are handled to meet all requirements stipulated by
VBG62orsimilarregulationsuntiltheyarehandedovertothemanufacturer.
Otherwise, SAMSON does not accept any responsibility.

10 EB 9510 EN
Safety instructions and measures
1.3 Notes on possible property damage
NOTICE
!
Risk of dp cell damage due to contamination (e.g. solid particles) in the pipeline.
The plant operator is responsible for cleaning the pipelines in the plant.
ÎObservethemaximumpermissiblepressurefordpcellandplant.
Risk of damage to the differential pressure meter due to the maximum permissible
valuesspeciedintheECtypeexaminationcerticatebeingexceeded.
The plant operator is responsible for cleaning the pipelines in the plant.
ÎDonotexceedthemaximumpermissiblevalues(Uior U0, lior I0, Pior P0, Cior C0
and Lior L0) when interconnecting intrinsically safe electrical equipment.
Risk of dp cell damage due to unsuitable medium properties.
Thedeviceisdesignedforprocessmediawithdenedproperties.
ÎOnly use process media suitable for the device version according to the article code
(seepage15).
Risk of damage to the dp cell due to incorrect use with oxygen.
Whenliquidoxygenisusedastheprocessmedium,thepermissibletemperaturerange
isexceeded.
ÎWhenthedeviceisusedforoxygenservice,makesurethatthedpcellandany
SAMSON accessories (e.g. valve block) only come into contact with gaseous
oxygen.
ÎThemaximumpermissibleoxygenpressureis50bar.
Risk of leakage and dp cell damage due to excessively high or low tightening
torques.
Observethespeciedtorquesontighteningconnectingpartsofthedpcell.Excessively
tightened torques lead to parts wearing out quicker. Parts that are too loose may cause
leakage.
ÎObserve tightening torques.

EB 9510 EN 11
Safety instructions and measures
NOTICE
!
An incorrect electrical power supply will damage the electronics.
TheMedia7deviceisdesignedtooperateunderexactlydenedelectricalconditions.
ÎObserve the permissible tolerances of the supply voltage.
ÎFor wiring, you are required to observe the relevant regulations concerning device
safety and electromagnetic compatibility.
Risk of damage to the device due to incorrect mounting position.
ÎMount the device in the upright position only.
Incorrect installation or removal of the option modules will damage the differential
pressure meter.
ÎBeforeinsertingorremovingtheoptionmodules,disconnectthepowersupply.

12 EB 9510 EN
Markings on the device
2 Markings on the device
2.1 Nameplate
1) Thereisnopressuresensorindevicesusedwithammablegases.Therefore,itisnotspeciedonthe
nameplate.
2) Thersttwoguresoftheserialnumberinreverseorderindicatetheyearofmanufacture(example:serial
number71xxxxxÎYear of manufacture = 2017).
3) 15-digitserialnumberforuniqueidenticationofmobiledevices
1 Signal range
2Electricpowersupply
3Pressuresensor(yes/no)1)
4Typeofprotectionforexplosion-protected
devices
5Temperaturelimitsinthetestcerticatesfor
theexplosion-protecteddevices
6 Model number
7 Firmware version
8CongurationID
9 Serial number2)
10 InternationalMobileEquipmentIdentity3)
11 Pressure rating
12 Measuring range
13 Optional additional function
14 Ordering number
15 Abbreviation of optional additional function
16 QRcode
17 Activation code
Media 5007 - 1
SAMSON AG D-60314 Frankfurt
Made in Germany
Output Supply
Model 5007 -
Differential Pressure Meters
0044
* See technical data and explosion-protection
certificate for permissible ambient temperature
and maximum values for connection to
certified intrinsically safe circuits.
pressure sensor
Firmware
Serial no.
Var.-ID
1
4
5
2
6
7
8
9
3
Two-wire version (explosion-protected):
Media 5007 - 1
Made in Germany
Output Supply
Model 5007 -
Differential Pressure Meters
pressure sensor
Firmware
Serial no.
Var.-ID
1 2
6
7
8
9
3
SAMSON AG, Germany
See technical data for ambient temperature
Two-wire version (without explosion
protection):
Media 5007 - 1
Made in Germany
Supply 24 V DC
Model 5007 -
Differential Pressure Meters
pressure sensor
Firmware
Serial no.
Var.-ID
6
7
8
9
3
SAMSON AG, Germany
See technical data for ambient temperature
24Vversion:

EB 9510 EN 13
Markings on the device
6
SAMSON 5007-1 Option module [GSM]
IMEI:
Activation-Code:
GSM Module
Model
10
16
17
Nominal range mbar
12
9
8
11
Serial no.
Var.-ID
Model 5007
SAMSON
Media
Made in Germany
dp cell: GSMmodule(seesection6.2):
SAMSON 5007 Option module
13
15
Optionmodulewithoutexplosionprotection(seesection6.1):
Serial no.
SAMSON 5007-1
Module
1
14
9
13
4
Optionmodulewithexplosionprotection(seesection6.1):

14 EB 9510 EN
Markings on the device
2.2 Article code
Media 7 5007-1- x x x x x x x x x 0 x x x x x x x x
With4“LCD
Explosionprotection
Without 0001
ATEX: II2GExiaIIBT4Gb 110
IECEx: ExiaIIBT4Gb 111
ATEX: II1/2GExiaIIBT4Ga/Gb 120
IECEx: ExiaIIBT4Ga/Gb 121
Energysupply
Two-wire 0
Powersupplyunit,24to36VDC 1
Option module slot 1
Without 0
AO: Analog output 5
AI: Analog input 4
AIA: Analog input active 6
Option module slot 2
Without 0
AO: Analog output 5
AI: Analog input 4
AIA: Analog input active 6
Option module slot 3
Without 0
AO: Analog output 5
AI: Analog input 4
AIA: Analog input active 6
Option module slot 4
Without 0
AO: Analog output 5
AI: Analog input 4
AIA: Analog input active 6

EB 9510 EN 15
Markings on the device
Media 7 5007-1- x x x x x x x x x 0 x x x x x x x x
GSM module with antenna
Without 0
GSM module with antenna (including SIM
card) 2
dp cell material
Brass 0
Measuring range
160mbar 0 2
600mbar 0 5
1600mbar 0 7
3600mbar 0 9
Diaphragm
ECO:–40to+80°C,REACHcompliant 0
Version
VersionforcryogenicgasesaccordingtoDINENISO23280,packedinplasticbags,
freeofoilandgreaseaccordingtocompanystandardWN1.34-2Sheets1and1.1
1 1
VersionforoxygenaccordingtoDINENISO25208,packedinplasticbags,free
ofoilandgreaseaccordingtocompanystandardWN1.34-2Sheets1and1.1
1 2
Pressure rating
50bar,versionforoxygenservice,withoutvalveblock 1
60bar,withoutvalveblock 2
50bar,withvalveblockPN50 3
Pressure sensor
Without 1
With,non-ammablegases 2

16 EB 9510 EN
Design and principle of operation
3 Design and principle of oper-
ation
TheMedia7deviceisamicroprocessor-con-
trolled transmitter with dp cell for measuring,
indicating and transmitting the differential
pressure, pressure or measured variables de-
rived from them in stationary pressure ves-
sels and in transportation vehicles. The de-
vice is suitable for cryogenic gases, liquids,
gases and vapors. Measuring ranges be-
tween0to160mbarand0to3600mbar,
nominalpressurePN60.
The device mainly consists of a dp cell (1),
housing with transmitter and a display (6).
Thedifferentialpressure∆p=p1–p2is con-
verted into an electric signal in the dp cell by
a sensor and processed in the microcontrol-
ler(2)whichcontrolsthedisplayandD/A
converter of the two-wire version.
Four capacitive keys (4) are used to operate
the differential pressure meter and allow the
user to navigate within the menu on the dis-
play.
ThemodulardesignoftheMedia7device
allowsittobeadaptedtospecicrequire-
ments. Optional additional functions are
available through the use of option modules
(seesection6.1).
A remote data transmission using the option-
alGSMmodule(9)ispossibleinthe24V
version. Connection to the SAM TANK
MANAGEMENTwebinterfaceisestablished
overamobilenetwork(seesection6.2).
Operating mode
−Differential pressure measurement
betweenowandreturnowpipeas
well as pressure drop measurement
acrossvalvesandlters
−Liquidlevelmeasurement in stationary
pressure vessels and transportation vehi-
cles
Powersupplyunitwithstandbypowersup-
ply(SPS)
The power supply units include a battery
compartmentfora1.5Vbatterywhichpro-
vides standby power supply upon power
failure(seesection6.3).
3.1 Congurationusingthe
TROVIS-VIEWsoftware
The differential pressure meter can be con-
guredwithSAMSON'sTROVIS-VIEWSoft-
ware (version 4). For this purpose, the differ-
ential pressure meter has a digital interface
(SSP)toallowtheUSBportofacomputerto
be connected to it using an adapter cable.
TheTROVIS-VIEWsoftwareenablestheuser
toeasilycongurethedifferentialpressure
meter as well as view process parameters
online.
TROVIS-VIEW can be downloaded free of
charge from our website at www.
samsongroup.com > Service & Support >
Downloads > TROVIS-VIEW.
Note

EB 9510 EN 17
Design and principle of operation
1 dp cell
2 Microcontroller
3 Data memory
4 Operating keys
524Vpowersupply
unit
6 Display
7 Serial interface
8 UB=24to36V
9 GSM module
1 dp cell
2 Microcontroller
3 Data memory
4 Operating keys
5D/Aconverter
6 Display
7 Serial interface
8 IA=4to20mA
Two-wire version
24Vversion
1
3
2
4
5
6
p2–p
1+
EEPROM
µC
8
7
#
PΔP
##
1
3
2
4
5
6
p2–p
1+
EEPROM
µC
8
7
PΔP
##
GSM
=
=
9
Fig.1: Media7 · Block diagrams

18 EB 9510 EN
Design and principle of operation
3.2 Application
The differential pressure of liquids, vapors and gases are measured by the integrated dp cell
intheMedia7device.Themeasureddifferentialpressureisusedforvariouspossibleappli-
cations.
3.2.1 Differential pressure measurement
Two absolute pressures p1and p2are compared for the differential pressure measurement.
Thisway,forexamplethelterscanbemonitoredbymeasuringtheupstreamanddown-
streampressuresatthelter.
3.2.2 Liquidlevelmeasurement
The tank content (function of hydrostatic pressure, tank geometry and liquid density of the
stored gas) is displayed proportionally and the operating pressure is indicated in the selected
unitonthedisplay.Fig.2illustratestheprincipleoftheliquidlevelmeasurement.
Media 7 with valve blockTank
+
_
Ar, N2,
O2, CO2
H
h
hMeasuredheight(≈tankcontent)
HMeasuring range
Fig.2: Principle of liquid level measurement

EB 9510 EN 19
Design and principle of operation
3.2.3 Devicearrangementforliquidlevelmeasurement
−Fig.3,diagram1:measurementoncryogenictanks
−Fig.3,diagram2:measurementonpressurevesselswithcondensingornon-condensing
pressurereserve.Theadditionalheightzisincludedinthemeasurement.Asaresult,this
height(z)mustbeaslowaspossible.
−Fig.3,diagram3:measurementonopenvesselswiththemeterlocatedinalowposition.
The compensation height Kcan be as large as required depending on the conditions in
the plant.
h
H
z
h
Hh
K
H
Y
+– +–
+–
Diagram1 Diagram2 Diagram3
h Measured height
HMeasuring range
zAdditional height
K Compensation height
Fig.3: Liquid level measurement·Arrangement of devices (illustration with SAMSON valve block)

20 EB 9510 EN
Design and principle of operation
3.3 Versions
3.3.1 Two-wire version
−Type5007-xxx0...
The two-wire version is supplied with a 4 to
20mAsignalfromacurrentsource.This
versionisavailablewithexplosionprotec-
tion.
3.3.2 24Vversion
−Type5007-xxx1...
The24Vversionhasawiderambienttem-
perature range. Due to the greater electrical
power, it has additional functions, such as il-
luminated display and remote data transmis-
sionthroughtheuseofaretrottableGSM
module.
3.4 Device overview and oper-
ating controls
ÎSeeFig.4
1 Display
2Conrmkey
3 Up arrow key
4 Down arrow key
5Backkey
6ErrorLED
7BatteryLED(SPS)
8StatusLEDsforGSMmodule
9 Signal input terminal
10 Slot for GSM module
11 SSP interface
12 Slots 1 to 4 for option modules
13 SPS: standby power supply
14 Grounding connection