LEM IST ULTRASTAB User manual

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IST ULTRASTAB
USER GUIDE

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TABLE OF CONTENTS
TABLE OF CONTENTS ................................................................................................................................2
LIST OF FIGURES........................................................................................................................................2
LIST OF TABLES..........................................................................................................................................2
1. INTRODUCTION.......................................................................................................................................3
2. WARRANTY STATEMENT.......................................................................................................................4
3. RECEIVING AND UNPACKING................................................................................................................5
4. TECHNICAL SPECIFICATIONS...............................................................................................................6
5. SYSTEM DESCRIPTION..........................................................................................................................7
5.1 FRONT PANEL....................................................................................................................................8
5.2 INDICATOR PANEL ............................................................................................................................8
5.3 BACK PANEL ......................................................................................................................................9
5.4 TRANSDUCER PORT.........................................................................................................................9
5.5 CONNECTING THE TRANSDUCERS..............................................................................................10
5.6 OUTPUT PORT.................................................................................................................................11
6. INSTALLATION ........................................................................................................................................14
7. OPERATING INSTRUCTIONS ...................................................................................................................15
8. MAINTENANCE.........................................................................................................................................15
LIST OF FIGURES
FIGURE 1: An overview of the front panel, with a close-up of the indicator panel .......................................8
FIGURE 2: Overview of the IST ULTRASTAB back panel ...........................................................................9
FIGURE 3: Pin out for 9-pin transducer connector .......................................................................................9
FIGURE 4: Connecting a transducer to IST ULTRASTAB..........................................................................10
FIGURE 5: Transducer to IST ULTRASTAB connection cable wiring........................................................10
FIGURE 6: Output terminals........................................................................................................................11
FIGURE 7: Status/Interlock port Wiring.......................................................................................................12
FIGURE 8: Pin out for 15-pin status connector...........................................................................................13
FIGURE 9: IST ULTRASTAB in a typical 3-channel current output application .........................................14
LIST OF TABLES
TABLE 1: Technical specifications................................................................................................................6
TABLE 2: IT/ITN ULTRASTAB compatibility chart........................................................................................7
TABLE 3: Two shielded connection cables available for connecting the transducers................................10
TABLE 4: Recommended standard values of R.........................................................................................13

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1. INTRODUCTION
Congratulations with your purchase of LEM IST ULTRASTAB.
The IST ULTRASTAB unit serves as power supply and signal processing unit for up to 6
individual LEM IT/ITN ULTRASTAB current transducer units. It ensures that the extremely high
precision and low noise offered by the transducers is preserved and made available in a
convenient and user-friendly unit.
Please read this manual carefully before use. It contains information on how to set up and use
the IST ULTRASTAB and how to build a system utilizing the multichannel capabilities of the unit.
In case of unanswered questions do not hesitate to contact either LEM Switzerland S.A. or our
local distributor directly.
IMPORTANT: LEM Switzerland S.A. will not be held responsible for use of the IST ULTRASTAB unit
under conditions and/or in application setups not supported by the information in this user guide.

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2. WARRANTY STATEMENT

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3. RECEIVING AND UNPACKING
The shipping material and the IST ULTRASTAB should be thoroughly inspected for signs of
obvious physical damage immediately upon receipt.
All materials in the package should be checked against the enclosed packing list and the list of
standard delivery below. LEM Switzerland S.A. will not be responsible for any shortages unless
notified immediately.
The LEM IST ULTRASTAB package should contain:
•Electronics 19 inch crate model IST ULTRASTAB
•European (Schuko) and USA mains cable with three-pole IEC female connector.
IN CASE OF DAMAGE
If the equipment is damaged in any way, a claim should be filed with the shipping agent, and a
full report of the damage should be forwarded to LEM Switzerland S.A. or our local
representative immediately upon arrival.
Upon receipt of this report, LEM Switzerland S.A. will forward instructions concerning the repair,
replacement or return shipment.
Please include the Type No., Serial No., and Order No. for the IST ULTRASTAB on any
communication with LEM Switzerland S.A. or our local representative.

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4. TECHNICAL SPECIFICATIONS
Electrical Data – MAINS INPUT
Mains Input 100 .. 240 V rms, 50/60 Hz IEC-type dual-fused inlet socket
Fuses 2.5 AT / 240 V rms
Power consumption <150 W All channels driven at max. 1 A
secondary output current
Electrical data – TRANSDUCER PORT
Supply Output ±15 V DC 6 channels, 1.1 A per channel
Ripple <15 mV rms 50/60Hz
Noise <15 mV rms DC to 10kHz
Load regulation <5 %
Electrical data – STATUS PORT
Max Collector-Emitter
voltage, off-state 45 V
Max Collector-Emitter
current, on-state 30 mA
Max reverse Collector-
Emitter voltage, off-state 5 V
Collector-Emitter voltage,
on-state ≤1 V
Insulation voltage between
rack electronics and status
port connections
3 kV rms
Physical data
Dimensions 483 x 88 x 290 mm WxHxD, incl. handles/connectors
Weight 4.2 kg
Operating conditions
Temperature 10 .. 40 °C
Humidity 20 .. 80 % RH
Cooling Passive
Storage conditions
Temperature -20 .. 85 °C
Humidity 20 .. 80 % RH
Regulatory conformance
Safety IEC 61010-1: 2001
EMC IEC 61000-6-2: 2005
IEC 61000-6-4: 2007
TABLE 1: Technical specifications

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5. SYSTEM DESCRIPTION
The IST ULTRASTAB voltage output differs from the current output by having up to six Voltage-
Output-Modules (VOM) installed in the chassis. The system cabinet is compatible with standard
19 inch rack mount systems, but can also be used in a table-top setup.
LEM IST ULTRASTAB is available in two versions:
-Current output
-±10 V Voltage output
The IST ±10 V Voltage output version differs from the current output one only in having up to six
Current-to-Voltage conversion modules, which are mounted in the chassis.
Typical applications include multichannel AC and DC measurements on e.g. three-phase
systems like motors and motor drivers, power converters and similar types of equipment often in
combination with a precision power analyzer.
In basic terms, the IST ULTRASTAB can drive up to six channels at a total (summed) current
consumption of 6.6 A.
Current range Products
60 A IT 60-S, IT 65-S
200 A IT 200-S, IT 205-S
400 A IT 400-S, IT 405-S
600 A IT 605-S, ITN 600-S
700 A IT 700-S
900 A ITN 900-S
1000 A IT 1000-S/SP1, ITN 1000-S
TABLE 2: IT/ITN ULTRASTAB compatibility chart.

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5.1 FRONT PANEL
The front panel includes indicators for each transducer channel.
FIGURE 1: An overview of the front panel, with a close-up of the indicator panel
5.2 INDICATOR PANEL
The illuminated indicator panel has seven fields that are lit in the following modes:
POWER:
•Green light - Mains power is applied.
•No light – Unit is in off-state.
CHANNEL 1-6:
•Green light - Indicated transducer is attached and Normal Operation signal is ok.
Transducer is operational.
•Red light - Indicated transducer is attached and Normal Operation signal is NOT
ok.
•No light – No transducer is connected.

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5.3 BACK PANEL
The IST ULTRASTAB unit provides 9-pin D-Sub female connector for up to six IT/ITN
ULTRASTAB transducers and the measured secondary current from each transducer is looped
to a set of output jacks (4 mm standard “banana” terminals) for the current output version.
For the voltage output, the secondary current from each transducer flows through the burden
resistance in the corresponding Voltage-Output-Module (VOM).
The status of each individual transducer is presented on a 15-pin D-Sub male connector
common for all six channels.
IMPORTANT: The IST ULTRASTAB unit has NO breaker for switching mains on and off. Power is
supplied to the unit once the mains cable is inserted into the mains inlet and mains are switched on at
the outlet. Indication of active mains is provided by the POWER indicator.
FIGURE 2: Overview of the IST ULTRASTAB back panel
5.4 TRANSDUCER PORT
Each channel is equipped with a 9-pin D-Sub connector that interfaces to LEM IT/ITN
ULTRASTAB units. The pinout is shown below:
Pin 1: Output Current Return
Pin 2: N/C
Pin 3: Ground
Pin 4: Ground
Pin 5: Negative supply -15V
Pin 6: Output Current
Pin 7: N/C
Pin 8: Normal Operation
Pin 9: Positive supply +15V
FIGURE 3: Pinout for 9-pin transducer connector
9-pin D-Sub female UNC 4-40 screw lock

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5.5 CONNECTING THE TRANSDUCERS
The IST ULTRASTAB rack provides 6 9-pin D-Sub connectors on the back panel for connecting up to 6
IT/ITN individual transducers.
Each 9-pin D-Sub connector is used to connect the supply voltage to the DC power input of the
transducer. It also routes the secondary current lines and the status signal from the transducer to the IST
ULTRASTAB unit.
Connect the transducers at the 9-pin D-Sub connectors on the IST ULTRASTAB back panel via the
shielded connection cables which have to be ordered separately.
The shielded connection cable for operating a transducer is shown below:
FIGURE 4: Connecting a transducer to IST ULTRASTAB
The following 2 shielded connection cables are available:
Description Order number
Shielded connection cable length = 6 meters 71.12.08.000.0
Shielded connection cable length = 10 meters 71.12.08.000.0
TABLE 3: Two shielded connection cables available for connecting the transducers.
It is recommended to use the connection cables indicated in the table 3 above. It is also possible to
configure your own cable, bearing the following description in mind.
The connection cable wiring is shown below:
FIGURE 5: Transducer to IST ULTRASTAB connection cable wiring

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To prevent any malfunction that may occur due to the cable/wire voltage drop (i.e., its length and the wire
resistance inside the cable) between the IST ULTRASTAB rack and the transducer, a cable with at least 7
wires, each having a cross section AWG 22, AWG 23 or ≥0.25 mm², must be used.
In addition, it is recommended to use shielded cables in order to limit the effects of noise due to
electromagnetic interference (EMI).
5.6 OUTPUT PORT
The measured secondary current or the ±10 V signal is output on a pair of 4 mm safety
“banana” jacks.
Red: Current output or ±10 V Voltage output
depending on IST version.
In current output case, this terminal is connected
directly to pin 6 of the corresponding transducer port
Black: Current output return or ±10 V signal ground.
In current output case, this terminal is connected
directly to pin 1 of the corresponding transducer port
FIGURE 6: Output terminals
IMPORTANT: The secondary current path must ALWAYS be closed before applying primary current,
i.e. a terminating burden resistor must be connected.

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All LEM IT/ITN ULTRASTAB current transducers generate a status signal, which contains
information about the operational status of the unit. This signal is routed through the IST
ULTRASTAB and available in one 15-pin D-Sub male connector containing status signals for all
6 channels. The pinout is shown in figure 8.
The status port can optionally be used in any general safety interlock set up circuit.
All signals on the status/interlock connector are optically isolated, photocouplers type, floating
Collector and Emitter. Depending on how each signal is wired, it can be “Active Low” or “Active
High” as shown below:
FIGURE 7: Status/Interlock port Wiring

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In the diagram A, the active low output signal V
out
switches to GND when the corresponding
transducer is OK (Normal operation and Green LED is lit). In the same manner, the transistor is
switched off (No current from collector to emitter) to indicate that the corresponding transducer
is not OK. Consequently, V
out
switches to U
C
and the corresponding Green LED is OFF,
whereas the corresponding Red LED is lit.
In the diagram B, the active high output signal V
out
switches to U
C
when the corresponding
transducer is OK (Normal operation and Green LED is lit). In the same manner, the transistor is
switched off (No current from collector to emitter) to indicate that the corresponding transducer
is not OK. Consequently, V
out
switches to GND and the corresponding Green LED is OFF,
whereas the corresponding Red LED is lit.
The power supply voltage U
C
must be between 4 V and 45 V DC and the resistor value R must
be chosen between a minimum value Rmin and a maximum value Rmax.
Some recommended standard values of Rare given in the following table:
Power supply Voltage U
C
Rmin (kΩ)Rmax (kΩ)RStandard Values ±5%
5 V 0.153 2.3 180 Ω, 1kΩ, or 2.2 kΩ
12 V 0.386 5.8 470 Ω, 2.2 kΩor 4.7 kΩ
24 V 0.786 11.8 1 kΩ, 2.2 kΩor 10 kΩ
TABLE 4: Recommended standard values of R
Status Connector:
Power Status: Pin 1 Collector & Pin 5 Emitter
Channel 1: Pin 9 Collector & Pin 13 Emitter
Channel 2: Pin 2 Collector & Pin 6 Emitter
Channel 3: Pin 10 Collector & Pin 14 Emitter
Channel 4: Pin 3 Collector & Pin 7 Emitter
Channel 5: Pin 11 Collector & Pin 15 Emitter
Channel 6: Pin 4 Collector & Pin 8 Emitter
FIGURE 8: Pinout for 15-pin status connector
15
-
pin D
-
Sub male UNC 4
-
40 screw lock

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6. INSTALLATION
Before applyin mains power to the unit, check that the specified AC volta e and current are
available and that the ambient temperature is within the ran e specified in this manual.
IMPORTANT: The IST ULTRASTAB is passively cooled by airflow enterin the perforated areas in top,
sides and bottom of the cabinet. Make sure that these holes are not blocked as this will severely affect
the performance of the unit.
Establish the Ground connection accordin to the local authority re ulations and the
requirements of the equipment via the AC power plu .
Mount the shielded connection cables between the electronics crate and the transducers. Use
channel 1 to 3 as default. Check that all plu s are pushed fully in place.
The IT/ITN ULTRASTAB transducer itself may be installed in any orientation but be careful to
consider potential influence of the physical layout of the setup with surroundin bus bars,
transformers etc.
Finally, make sure that a suitable burden resistor is installed on each active channel (only for
current output version).
A typical 3-channel setup is shown below:
I
p1
I
p2
I
p3
R
b3
R
b2
R
b1
I
s3
I
s2
I
s1
FIGURE 9: IST ULTRASTAB in a typical 3-channel current output application

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7. OPERATING INSTRUCTIONS
When instructions for installation are complete, the IST ULTRASTAB can be switched ON.
Apply mains power by insertin the cable plu in the mains inlet and switchin on mains at the
outlet. The reen indicator LED “Power” will be lit.
Observe that the channel indicators turns on GREEN where transducers are connected and
remains unlit where no transducer is connected. If a channel indicator turns RED please o
throu h the setup, check that all cables are securely fastened etc. – it may also be the
transducer that is faulty.
If any problem persists durin this operation, please contact our local representative or LEM
Switzerland S.A. directly.
Further application information for IT/ITN ULTRASTAB transducers can be found in their
respective data sheets which can be easily obtained on www.lem.com or by contacting your
local representative.
IMPORTANT: In order to avoid excessive saturation of the iron core in the transducer head, the IST
ULTRASTAB unit should ALWAYS be switched on before the actual primary current source is applied to
any of the attached transducers.
IMPORTANT: The secondary current path must NEVER be opened when primary current is applied.
This means that cables to/from the current output port (banana jacks) should never be detached
durin operation.
8. MAINTENANCE
The IST ULTRASTAB assembly does not require any maintenance under normal operation.