KROHNE SU 600 User manual

Operating Instructions
SU 600
4 … 20 mA signal conditioning instrument
Document
ID: 30652

2
Contents
SU 600 • 4 … 20 mA signal conditioning instrument
30652-EN-150129
Contents
1 About this document
1.1 Function ........................................................................................................................... 3
1.2 Target group ..................................................................................................................... 3
1.3 Symbols used................................................................................................................... 3
2 For your safety
2.1 Authorised personnel ....................................................................................................... 4
2.2 Appropriate use................................................................................................................ 4
2.3 Warning about incorrect use............................................................................................. 4
2.4 General safety instructions............................................................................................... 4
2.5 Safety label on the instrument .......................................................................................... 5
2.6 CE conformity................................................................................................................... 5
2.7 Environmental instructions ............................................................................................... 5
3 Product description
3.1 Conguration.................................................................................................................... 6
3.2 Principle of operation........................................................................................................ 7
3.3 Operation ......................................................................................................................... 7
3.4 Packaging, transport and storage..................................................................................... 7
4 Mounting
4.1 General instructions ......................................................................................................... 9
4.2 Mounting instructions ....................................................................................................... 9
5 Connecting to power supply
5.1 Preparing the connection ............................................................................................... 11
5.2 Input mode active/passive.............................................................................................. 11
5.3 Connection procedure.................................................................................................... 12
5.4 Wiring plan ..................................................................................................................... 12
6 Setup with the integrated display and adjustment unit
6.1 Adjustment system......................................................................................................... 13
6.2 Setup steps .................................................................................................................... 14
6.3 Application example....................................................................................................... 18
7 Maintenanceandfaultrectication
7.1 Maintenance .................................................................................................................. 20
7.2 Rectify faults................................................................................................................... 20
7.3 Instrument repair ............................................................................................................ 21
8 Dismount
8.1 Dismounting steps.......................................................................................................... 22
8.2 Disposal ......................................................................................................................... 22
9 Supplement
9.1 Technical data ................................................................................................................ 23
9.2 Dimensions .................................................................................................................... 25
9.3 Certicate....................................................................................................................... 26
Editing status: 2015-01-13

3
1 About this document
SU 600 • 4 … 20 mA signal conditioning instrument
30652-EN-150129
1 About this document
1.1 Function
This operating instructions manual provides all the information you
need for mounting, connection and setup as well as important instruc-
tionsformaintenanceandfaultrectication.Pleasereadthisinforma-
tion before putting the instrument into operation and keep this manual
accessible in the immediate vicinity of the device.
1.2 Target group
This operating instructions manual is directed to trained specialist
personnel.The contents of this manual should be made available to
these personnel and put into practice by them.
1.3 Symbols used
Information, tip, note
This symbol indicates helpful additional information.
Caution: If this warning is ignored, faults or malfunctions can result.
Warning: If this warning is ignored, injury to persons and/or serious
damage to the instrument can result.
Danger: If this warning is ignored, serious injury to persons and/or
destruction of the instrument can result.
Ex applications
This symbol indicates special instructions for Ex applications.
SIL applications
This symbol indicates instructions for functional safety which must be
taken into account particularly for safety-relevant applications.
• List
The dot set in front indicates a list with no implied sequence.
→ Action
This arrow indicates a single action.
1 Sequence of actions
Numbers set in front indicate successive steps in a procedure.
Battery disposal
This symbol indicates special information about the disposal of bat-
teries and accumulators.

4
2 For your safety
SU 600 • 4 … 20 mA signal conditioning instrument
30652-EN-150129
2 For your safety
2.1 Authorised personnel
All operations described in this operating instructions manual must
be carried out only by trained specialist personnel authorised by the
plant operator.
During work on and with the device the required personal protective
equipment must always be worn.
2.2 Appropriate use
SU 600 is a universal signal conditioning instrument and power sup-
ply unit for connection of a 4 … 20 mA/HART sensor.
Youcannddetailedinformationabouttheareaofapplicationin
chapter "Product description".
Operational reliability is ensured only if the instrument is properly
usedaccordingtothespecicationsintheoperatinginstructions
manual as well as possible supplementary instructions.
For safety and warranty reasons, any invasive work on the device
beyond that described in the operating instructions manual may be
carried out only by personnel authorised by the manufacturer. Arbi-
traryconversionsormodicationsareexplicitlyforbidden.
2.3 Warning about incorrect use
Inappropriate or incorrect use of the instrument can give rise to
application-specichazards,e.g.vesseloverllordamagetosystem
components through incorrect mounting or adjustment.
2.4 General safety instructions
This is a state-of-the-art instrument complying with all prevailing
regulations and guidelines.The instrument must only be operated in a
technicallyawlessandreliablecondition.Theoperatorisresponsible
for the trouble-free operation of the instrument.
During the entire duration of use, the user is obliged to determine the
compliance of the necessary occupational safety measures with the
current valid rules and regulations and also take note of new regula-
tions.
The safety instructions in this operating instructions manual, the na-
tional installation standards as well as the valid safety regulations and
accident prevention rules must be observed by the user.
For safety and warranty reasons, any invasive work on the device
beyond that described in the operating instructions manual may be
carried out only by personnel authorised by the manufacturer. Arbi-
traryconversionsormodicationsareexplicitlyforbidden.
The safety approval markings and safety tips on the device must also
be observed.

5
2 For your safety
SU 600 • 4 … 20 mA signal conditioning instrument
30652-EN-150129
2.5 Safety label on the instrument
The safety approval markings and safety tips on the device must be
observed.
2.6 CE conformity
ThedevicefulllsthelegalrequirementsoftheapplicableECguide-
lines.ByaxingtheCEmarking,weconrmsuccessfultestingofthe
product.
2.7 Environmental instructions
Protection of the environment is one of our most important duties.
That is why we have introduced an environment management system
with the goal of continuously improving company environmental pro-
tection.Theenvironmentmanagementsystemiscertiedaccording
to DIN EN ISO 14001.
Pleasehelpusfulllthisobligationbyobservingtheenvironmental
instructions in this manual:
• Chapter "Packaging, transport and storage"
• Chapter "Disposal"

6
3 Product description
SU 600 • 4 … 20 mA signal conditioning instrument
30652-EN-150129
3 Product description
3.1 Conguration
The scope of delivery encompasses:
• Indicating and signal conditioning instrument SU 600
• Mounting set
• Identicationlabel
• Documentation
– this operating instructions manual
F
E
D
C
B
A
9
8
7
6
5
4
3
2
1
0
-+
12
1
3
7
6
5
2
4
Fig. 1: SU 600
1 Status indication operating relay 1 and 2
2 Status indication fail safe relay
3 Status indication operation
4 [+/-] adjustment keys
5 Insertabletagforidenticationofthemeasurementloop
6 Functionswitch
7 LC display
Thetypelabelcontainsthemostimportantdataforidenticationand
use of the instrument:
• Article number
• Serial number
• Technical data
Scope of delivery
Overview
Type label

7
3 Product description
SU 600 • 4 … 20 mA signal conditioning instrument
30652-EN-150129
3.2 Principle of operation
SU 600 is a universal single signal conditioning instrument with inte-
grated level switches and display for continuous sensors. At the same
time, it can serve as power supply unit for the connected sensor.SU
600 is designed for connection of any 4 … 20 mA sensor. The instru-
ment is suitable for carrier rail, panel and surface mounting.
The SU 600 signal conditioning instrument can power connected
sensors and process their measurement signals. The requested
measured variable is shown on the display and also outputted to the
integrated current output for further processing.The measurement
signal can thus be transferred to a remote indication or a superor-
dinate control system.Two level relays for control of pumps or other
devices are also integrated.
Wide-range power supply unit with 20 … 253 V AC/DC for worldwide
use.
Detailed information about the power supply can be found in chapter
"Technicaldata".
3.3 Operation
The adjustment of SU 600 is carried out via the integrated keys and a
16-step function switch.
3.4 Packaging, transport and storage
Your instrument was protected by packaging during transport. Its
capacity to handle normal loads during transport is assured by a test
based on ISO 4180.
The packaging of standard instruments consists of environment-
friendly, recyclable cardboard. For special versions, PE foam or PE
foil is also used. Dispose of the packaging material via specialised
recycling companies.
Transport must be carried out in due consideration of the notes on the
transport packaging. Nonobservance of these instructions can cause
damage to the device.
The delivery must be checked for completeness and possible transit
damage immediately at receipt. Ascertained transit damage or con-
cealed defects must be appropriately dealt with.
Up to the time of installation, the packages must be left closed and
stored according to the orientation and storage markings on the
outside.
Unless otherwise indicated, the packages must be stored only under
the following conditions:
• Not in the open
• Dry and dust free
• Not exposed to corrosive media
• Protected against solar radiation
Application area
Functional principle
Voltage supply
Packaging
Transport
Transport inspection
Storage

8
3 Product description
SU 600 • 4 … 20 mA signal conditioning instrument
30652-EN-150129
• Avoiding mechanical shock and vibration
• Storage and transport temperature see chapter "Supplement -
Technicaldata-Ambientconditions"
• Relative humidity 20 … 85 %
Storage and transport
temperature

9
4 Mounting
SU 600 • 4 … 20 mA signal conditioning instrument
30652-EN-150129
4 Mounting
4.1 General instructions
The instrument is designed for recessed installation in a front panel,
housing front plate or a switching cabinet door.The required cut-out
is 92 x 92 mm (3.63 x 3.63 in) according to EN 60529. When installed
correctly, protection rating IP 40 is guaranteed. As an alternative,
the instrument can be mounted into a switching cabinet or housing
bymeansofthreescrews(xedwithscrewsonrearofhousing).
A mounting adapter for carrier rail mounting is optionally avail-
able in the scope of delivery (top hat rail 35 x 7.5 according to DIN
EN 50022/60715).
Information:
If the instrument is mounted via the screws or carrier rail, it must
always be inside a switching cabinet or protective case.
4.2 Mounting instructions
1. Makesurethatthecutoutrequiredforinstallationhasasizeof
92 x 92 mm (3.63 x 3.63 in). The required installation depth is min.
90 mm (3.54 in).
2. Remove the pluggable terminal strips from the top and bottom.
3. Screw the threaded pin [3] into the rear of the instrument and
tighten with a screwdriver.
4. Insert the instrument from the front into the front panel [1].
5. Place the clamping strap [2] from the back over the pin [3] and
pull it with the knurled nut [4] against the panel [1].
1
32 4
Fig. 2: Front panel mounting
1 Front panel
2 Clamping bracket
3 Pin
4 Knurled nut
1. Insert the metal strap [1] from above into the housing cut-out.
2. Fasten the instrument directly to the wall with the three screws
(max. ø 4 mm).
Installation possibilities
Front panel mounting
Screw mounting

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4 Mounting
SU 600 • 4 … 20 mA signal conditioning instrument
30652-EN-150129
105
80
ø 4,5*
1
Fig. 3: Screw mounting
1 Metal strap
1. Place the adapter plate [1] to the rear of SU 600 (spring of the
adapter plate downward) and fasten the plate with screw [2]
(M4 x 6).
2. PlaceSU 600 against the carrier rail [3] from below and push the
instrument upward until it snaps in.
61
43,5
21 3
Fig. 4: Carrier rail mounting
1 Adapterplate
2 Screw (M4 x 6)
3 Carrier rail
Carrier rail mounting

11
5 Connecting to power supply
SU 600 • 4 … 20 mA signal conditioning instrument
30652-EN-150129
5 Connecting to power supply
5.1 Preparing the connection
Always keep in mind the following safety instructions:
• Connect only in the complete absence of line voltage
• If overvoltage surges are expected, overvoltage arresters should
be installed
Inhazardousareasyoumusttakenoteoftherespectiveregulations,
conformityandtypeapprovalcerticatesofthesensorsandpower
supply units.
Thepowersupplycanbe20…253VAC,50/60Hzor
20 … 253 V DC.
The voltage supply of SU 600 is connected with standard cable ac-
cording to the national installation standards.
The instrument is connected with standard two-wire cable without
screen. If electromagnetic interference is expected which is above the
test values of EN 61326 for industrial areas, screened cable should
be used.
Connect the cable screen on both ends to ground potential. In the
sensor, the screen must be connected directly to the internal ground
terminal.The ground terminal outside on the sensor housing must be
connected to the potential equalisation.
If potential equalisation currents are expected, the screen connection
on the side of SU 600 must be made via a ceramic capacitor (e. g.
1 nF, 1500 V). The low frequency potential equalisation currents are
thussuppressed,buttheprotectiveeectagainsthighfrequency
interference signals remains.
Take note of the corresponding installation regulations for Ex applica-
tions. In particular, make sure that no potential equalisation currents
owoverthecablescreen.Incaseofgroundingonbothsidesthis
can be achieved by the use of a capacitor or a separate potential
equalisation.
5.2 Input mode active/passive
With the function switch you can changeover between active and pas-
sive operation of the measuring data input.
• In active mode, SU 600 provides the power for the connected sen-
sors. Power supply and measurement data are transmitted over
the same two-wire cable.This mode is provided for connection of
measuring transducers without separate voltage supply (sensors
in two-wire version).
• In passive mode the sensors are not powered, only the measured
value is transmitted. This input is for connection of transmitters
with their own separate voltage supply (sensors in four-wire ver-
sion).The SU 600 can be also looped into the existing circuit like a
normal ammeter.
Note safety instructions
Take note of safety
instructions for Ex
applications
Select power supply
Select connection cable
Cable screening and
grounding
Select connection
cable for Ex applica-
tions

12
5 Connecting to power supply
SU 600 • 4 … 20 mA signal conditioning instrument
30652-EN-150129
5.3 Connection procedure
Proceed as follows:
1. Mount SU 600
2. Connect sensor cable to terminal 1 and 2, and where applicable,
connect the screen
3. Connectpowersupply(switchedo)toterminal5and6
4. If necessary, connect fail safe and operating relay as well as cur-
rent output
Theelectricalconnectionisnished.
5.4 Wiring plan
+-
12
+-
34
18 17 16 15 14 13 1211 10 9 8 76 5
N- L1+
on
1
2
12
%
1 2
3
7
4 5 6
Fig. 5: Terminal assignment SU 600
1 Measurementdatainput,optionallyavailablewithsensorpowersupply
2 Current output
3 Fail safe relay
4 Relay 2
5 Relay 1
6 Voltage supply
Overview

13
6 Setup with the integrated display and adjustment unit
SU 600 • 4 … 20 mA signal conditioning instrument
30652-EN-150129
6 Setup with the integrated display and
adjustment unit
6.1 Adjustment system
The integrated display and adjustment unit is for measured value dis-
play, adjustment and diagnosis ofSU 600. Indication and adjustment
is carried out in the front via a clear LC-display and a function switch
as well as two keys.
To open the cover, insert a screwdriver in the two slots on the top and
turn it slightly.
F
E
D
C
B
A
9
8
7
6
5
4
3
2
1
0
-+
12
1
3
7
6
5
2
4
Fig. 6: Display and adjustment elements
1 Status indication operating relay 1 and 2
2 Status indication fail safe relay
3 Status indication operation
4 Adjustmentkeys+/-
5 Insertabletagforidenticationofthemeasurementloop
6 Functionswitch
7 LC display
• [Function switch] for selection of:
– Adjustment
– Relay switching points
– Indication scaling
– Current output
– Integration time
– Osetcorrection
– Current input active/passive
• [+/-] key:
Key functions

14
6 Setup with the integrated display and adjustment unit
SU 600 • 4 … 20 mA signal conditioning instrument
30652-EN-150129
– Change value of the parameters
By pushing the [+/-] key, you change the individual parameters of the
selectedfunction.Inthisphase,theprocessedparameterisashing.
Bybrieypushingthetwokeyssimultaneously,yousaveyourset-
tings. "Save"isbrieydisplayed.
6.2 Setup steps
Setup comprises mainly the adjustment of the measurement loop.
A scaling of the measured value for the LC display and the adapta-
tion of the relay switching points are further settings. Additional setup
steps would be, if necessary, setting an integration time (damping) to
steady the measured value or modifying the current output character-
istics.
To clearly denote the measuring unit, the supplied labels can be in-
serted in the cover. In case several SU 600 are used, each measure-
ment loop should be clearly labelled.
Afterbeingswitchedon,SU600rstofallcarriesoutashortself-
check.The following steps are carried out:
• Internal check of the electronics
• Indicationofthermwareversion
• Theoutputsignaljumpsbrieytothesetfaultvalue
Then the actual measured value is displayed and the corresponding
current is transmitted to the current output.
The measured value indication shows the digital indication value and
also an analogue bargraph. Here, it is absolutely necessary that the
function switch is set to position [ 0] ("OPERATE").
The following functions can be selected via the rotary switch:
• 0: Measured value display and simulation
• 1: Relay 1 switching point ON
• 2: Relay 1 switching point OFF
• 3: Relay 2 switching point ON
• 2: Relay 2 switching point OFF
• 5: Decimal point position of the scaling
• 6: Scaling for 100 %
• 7: Scaling for 0 %
• 8: Switch over current output 0/4 … 20 mA
• 9: Damping of the measured value (integration time)
• A:Osetcorrection
• B: Min. adjustment in percent through change of the level
• C: Max. adjustment in percent through change of the level
• D: Min. adjustment in mA without changing the level
• E: Max. adjustment in mA without changing the level
• F: Changeover current input active/passive
• In active mode, SU 600 provides the power for the connected
sensor. Power supply and measurement data are transmitted over
the same two-wire cable.This mode is provided for connection of
Setup
Switch-on phase
Measured value indica-
tion
Function switch
Current input active/pas-
sive

15
6 Setup with the integrated display and adjustment unit
SU 600 • 4 … 20 mA signal conditioning instrument
30652-EN-150129
measuring transducers without separate operating voltage (sensor
in two-wire version).
• In passive mode, the sensors are not powered, only the measure-
ment value is transmitted. This mode is provided for connection of
transmitters with their own separate operating voltage (sensors in
four-wire version).
→ Set the function switch to position [F] and select the suitable
mode with the [+/-] keys. Save your settings by pushing both keys
simultaneously.
Whenapressuretransmitterisused,anosetcorrectionshouldbe
carriedoutrst.Theseinstrumentsarefactory-setinacertainposi-
tion.Ifthepressuretransmitterisnowmountedinadierentposition,
itsmeasuringrangeisshiftedslightly.Thezeropointisreadjustedby
carryingouttheosetcorrectioninuncovered(unpressurised)condi-
tion.The complete measuring range will be shifted by the deviating
amount.
1. Make sure that the pressure transmitter is completely unpressur-
ised,uncovered(unimmersed)andmountedinitsnalposition.
2. Set the function switch to position [A].The display indicates now
the actual sensor current in mA. Save the current status by push-
ing the [+/- ] keys simultaneously.
For this adjustment procedure, two sensor current values
(4 … 20 mA) must be entered corresponding to the levels 0 % and
100 %.
Whenusingapressuretransmitter,anosetcorrectionshouldbecar-
riedouttoreachmaximumaccuracy.Carryoutthisosetcorrection
before adjustment and with the sensor uncovered (unimmersed).
→ Now select the position [D] or [E] on the function switch, enter the
current values in mA for min. or max. adjustment and save your
settings.
During this adjustment procedure, the current level is assigned to
a certain percentage value. For this reason, percentage values that
correspondtotheactualllinglevelsmustbeenteredforthemin.and
max. adjustment. The ideal calibration is at 0 % and 100 %. Because
itisnotalwayspossibletoemptyorllavesselcompletely,anyvalue
canofcoursebeentered.Thegreaterthedierencebetweenthetwo
adjustment points, the more precise the measurement. It does not
matterwhichvalueisenteredrst.
→ Select position [B] or [C] on the function switch, enter the per-
centage values for the min. and max. adjustment and save your
settings.
Two operating relays are integrated inSU 600 for level detection. First
of all, determine at which switching points the relays should switch on
andoagain.Furthermoreyouhavetodistinguishbetweentherelay
modesoverllanddryrunprotection.Youswitchoverbyexchanging
the ON/OFF values of the relay.
Osetcorrection
Adjustment in mA without
changing the level
Adjustment in % by
changing the level
Relay outputs

16
6 Setup with the integrated display and adjustment unit
SU 600 • 4 … 20 mA signal conditioning instrument
30652-EN-150129
• Overowprotection:Relayisswitchedowhenthemax.levelis
exceeded (safe currentless state), relay is switched on again when
thelevelfallsbelowthemin.level(switch-onpoint<switch-o
point)
• Dry run protection:Relayisswitchedowhenthelevelfalls
below the min. level (safe currentless state), relay is switched on
again when the max. level is exceeded (switch-on point > switch-
opoint)
→ Toadjusttheonandoswitchingpointsofrelay1,setthefunc-
tion switch to position [1] or [2], enter the switching points for ON
or OFF and save your settings. If necessary, proceed in the same
way with relay 2 (position [3] or [4]).
2
1
3
off (on)
on (off)
on
on
off
off
t
LED
Fig. 7: Relay modes
1 Fillingheight
2 Modeoverllprotection
3 Mode dry run protection
Scaling means converting the measured value into a certain param-
eter and unit.The indication can then show the volume in litres e.g.,
instead of the percentage value. Indication values from -9999 to
+9999 are possible.
1. First of all, determine the max. indicating range and the number of
decimal places after the decimal point -- max. four decimal places
Scaling

17
6 Setup with the integrated display and adjustment unit
SU 600 • 4 … 20 mA signal conditioning instrument
30652-EN-150129
can be displayed. Select position [ 5 ] of the function switch, place
the decimal point in the required position and save your settings.
2. Now select position [6] or [7] on the function switch, enter the
requested values for 100 % or 0 % and save your settings.
Tosuppressuctuationsinthemeasuredvaluedisplay,e.g.caused
by an agitated product surface, an integration time can be set.This
time can be between 0 and 250 seconds. Remember that the reaction
time of the entire measurement will then be longer and the sensor will
react to measured value changes with a delay. In general, a period of
afewsecondsissucienttosmooththemeasuredvaluedisplay.
→ Now select position [9] on the function switch, enter the request-
ed value and save your settings
The characteristics of the current output can be switched over from
4 … 20 mA to 0 … 20 mA.
→ Now select position [8] on the function switch, adjust the re-
quested characteristics curve and save your settings
To check if the settings ofSU 600 are correct, the simulation mode
can be used. Any individual measured value can be simulated and
e.g. the correct behaviour of the relays and the connected instruments
can be checked.
Switching over between the functions "OPERATE" and "Simulation" is
done by pushing the [+/-] keys for at least 3 seconds. In the simula-
tionmode,thesetvalueashesonthedisplay.Thesimulationcanbe
switchedobypushingbothkeysagainforapprox.3seconds.Ifno
key is pushed, the display switches automatically over to "OPERATE"
after approx. 60 minutes and the simulation is terminated.
→ To start simulation, push the [ +/-] keys simultaneously until the
displayedvaluestartsashing(approx.3seconds).Bypushing
either of the [ +/-] keys, you can set the requested simulation
value and carry out your check.
With a reset, all values set by the user will be lost and are reset to
factory settings.
→ Interrupt the power supply of SU 600. Push the [+/-] keys simul-
taneously and hold them while you switch on the power supply.
The display shows "RES" and the default settings will be restored.
These are the following:
• Relay switch on points: 10 %
• Relayswitchopoints:100%
• Decimal point: 888.8
• Display min.: 0
• Display max.: 100.0
• Integration time: 0 s
• Osetcorrection:0
• Current output: 4 … 20 mA
• Min. adjustment: 0 % or 4 mA
• Max. adjustment: 100 % or 20 mA
Damping
Current output
0/4 … 20 mA
Simulation
Reset

18
6 Setup with the integrated display and adjustment unit
SU 600 • 4 … 20 mA signal conditioning instrument
30652-EN-150129
6.3 Application example
• An upright cylindrical (linear) tank has a volume of 2700 l
• Themax.llingvolumeis2650l,themin.llingvolume50l
• The level sensor in the vessel is a pressure transmitter (passive),
outputting a standardised 4 … 20 mA signal
• For further processing, an additional 4 … 20 mA output signal is
required
• The full and empty adjustment was carried out directly in the sen-
sor. The following values are outputted:
– Max. volume (display max.) 20 mA = 2650 l
– Min. volume (display min.) 4 mA = 50 l
• Relay 1 should switch on an emptying pump at a level of 90 % and
switchothepumpatalevelof10%
1. Select the following functions with the rotary switch.
2. Push one of the two [+/-] adjustment keys, the digital indication
ashes(iftherotaryswitchissetto"OPERATE", the [+/-] keys are
inoperable)
3. Adjust the requested value with the [+/-] keys. If you hold the key
pushed, the digital indication changes the value more quickly.
4. Save your settings by pushing the [+/-] keys simultaneously
1. Set the function switch to position [8]. Select with the [+/-] keys
the measured value output 4 … 20 mA or 0 … 20 mA. For this
example, choose 4 - 20.
The displayed numbers have the following meanings:
• 0 - 20 = 0 … 20 mA
• 4 - 20 = 4 … 20 mA
2. Save the value by pushing [+/-] simultaneously
SU 600 requires for scaling of the indication, the adjustment of the
llingquantitiesfor0%and100%.Thevesselmustneitherbelled
nor emptied.
1. Set the function switch to position [7] (display min.)
2. Set the value to 50 via the [+/-] keys
3. Save the value by pushing both keys simultaneously
1. Set the function switch to position [6] (display max.)
2. Set the value to 2650 via the [+/-] keys
3. Save the value by pushing both keys simultaneously
Since the range of the example tank is between 50 l and 2650 l, you
need all 4 decimal places for the digital indication.
1. Set the function switch to position [5] (Decimal Point)
2. By pushing the [+/-] keys, you move the decimal point
3. Save the value by pushing both keys simultaneously
• Set the function switch to position [ 1 ] (relay 1 on). For the given
example, select the value 90.0 (90.0 %) with the [ +/- ] keys. The
internal relay 1 then switches on when this value is reached. Save
the value by pushing the two keys simultaneously.
General procedure
Current output
Scaled indication at 0 %
Scaled indication at
100 %
Decimal point
Relay

19
6 Setup with the integrated display and adjustment unit
SU 600 • 4 … 20 mA signal conditioning instrument
30652-EN-150129
• Set the function switch to position [ 2](relay1o).Selectthe
value 10.0 (10.0 %) with the [ +/-] keys.The internal relay 1 then
switchesowhenthevaluefallsbelowthisvalue.Therespective
relaycontrollamplightswhentherelayisenergized.Iftheswitch-
ing points are too close together (< 0.1 %), the appropriate LED
ashes.Therelaytakesonthesafecondition.Inmode"OPERATE
" an error message is outputted on the display.
• If you want to control additional relays, proceed in the same way,
as with relay 1. The switch positions for setting the respective
relays are stated in the list of the function switch under "Setup
procedure".
Note:
If you want to change the mode (i.e. the switching function of the
relays),youhavetoexchangetheOnandOvalues.

20
7Maintenanceandfaultrectication
SU 600 • 4 … 20 mA signal conditioning instrument
30652-EN-150129
7 Maintenanceandfaultrectication
7.1 Maintenance
If the instrument is used properly, no special maintenance is required
in normal operation.
7.2 Rectify faults
The operator of the system is responsible for taking suitable meas-
ures to rectify faults.
Maximum reliability is ensured. Nevertheless, faults can occur during
operation.These may be caused by the following, e.g.:
• Measured value from sensor not correct
• Voltage supply
• Interference in the cables
Therstmeasurestobetakenaretochecktheinput/outputsignals
as well as to evaluate the error messages via the display. The proce-
dure is described below. In many cases, the causes can be deter-
minedinthiswayandfaultscanberectied.
The signal conditioning instrument and the connected sensors are
permanently monitored during operation and the values entered dur-
ing parameter adjustment are checked for plausibility. If irregularities
occur or in case of incorrect parameter adjustment, a fault signal is
triggered. In case of an instrument defect or line break/shortcircuit, a
fault signal is also triggered.
The fail safe relay deenergises in case of failure, the failure indication
lights and the current output jumps to 22 mA. In addition, one of the
following fault messages is outputted on the display.
Error code Cause Rectication
E003 CRC error (error with
self-check)
– Carry out a reset
– Send instrument for repair
E014 Sensor current
> 21 mA or short-
circuit
– Check sensor, e.g. on failure
– Remove short-circuit
E015 Sensor in boot phase
Sensor current
< 3.6 mA or line
break
– Check sensor, e.g. on failure
– Remove line break
– Check connection of the sensor
E016 Empty/full adjustment
reversed
– Carry out a fresh adjustment
E017 Adjustment span too
small
– Carry out a fresh adjustment and
increase the distance between min.
and max. adjustment
E021 Scaling span too
small
– Carry out a fresh scaling, increase
the distance between min. and max.
scaling.
Reaction when malfunc-
tions occur
Causes of malfunction
Faultrectication
Fault message