turck LTX Series User manual

Your Global Automation Partner
Operating instructions
LTX
Linear Position Sensors
with SSI Interface

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Contents

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1 About These Instructions 5
1.1 Target groups 5
1.2 Explanation of symbols 5
1.3 Other documents 5
1.4 Feedback about these instructions 5
2 Information About the Product 6
2.1 Product identication 6
2.2 Scope of delivery 7
2.3 Legal requirements 7
2.4 Manufacturer and service 7
3 For your Safety 7
3.1 Intended use 7
3.2 General safety information 8
4 Product Description 9
4.1 Device overview 9
4.1.1 Display elements 9
4.2 Properties and features 10
4.3 Operating principle 10
4.4 Functions and operating modes 10
4.4.1 Automatic signal control 11
4.4.2 Update mode 11
4.4.3 Measuring functions 12
4.4.4 Preferred type LTX…M-F10-SSI2-GAF1-X3-H1161 – Measuring range 12
4.5 Technical accessories 13
5 Mounting 15
5.1 Mounting the device in a hydraulic cylinder 16
5.1.1 Mounting the sensor 16
5.2 Fastening the device externally with a mounting bracket 17
5.2.1 Fitting additional mounting elements (for external mounting) 18
5.2.2 Mounting positioning elements (for external mounting) 18
6 Connection 19
6.1 Wiring diagram 19
7 Commissioning 20
8 Operation 20
8.1 LED display 20
9 Troubleshooting 21
9.1 Replacing the sensor head and measuring element 21
10 Maintenance 21
11 Repair 22
11.1 Returning devices 22
12 Disposal 22
13 Technical Data 23
13.1 Update time 23
Contents

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1 About These Instructions
These operating instructions describe the structure, functions and the use of the product, and
will help you to operate the product as intended. Read these instructions carefully before using
the product. This will prevent the risk of personal injury or damage to property or the device.
Retain these instructions for future use during the service life of the product. If the product is
passed on, ensure that these instructions are handed over as well.
1.1 Target groups
These instructions are intended for qualified personnel and must be read carefully by anyone
mounting, commissioning, operating, maintaining, dismantling or disposing of the device.
1.2 Explanation of symbols
The following symbols are used in these instructions:
DANGER
DANGER indicates an imminently hazardous, high-risk situation which, if not avoided,
will result in death or serious injury.
WARNING
WARNING indicates a potentially hazardous, medium-risk situation which, if not
avoided, could result in death or serious injury.
CAUTION
CAUTION indicates a situation that may result in property damage if not avoided.
NOTE
NOTE indicates tips, recommendations and important information. The notes will facili-
tate work, provide more information on specific actions and help prevent additional
work due to incorrect processes.
CALL TO ACTION
This symbol denotes action steps that the user must perform.
ACTION RESULT
This symbol denotes the relevant results of actions and action sequences.
1.3 Other documents
In addition to this document, the following material can be found on the Internet at
www.turck.com:
■Data sheet
■EU declaration of conformity
1.4 Feedback about these instructions
We make every effort to ensure that these instructions are as informative and as clear as pos-
sible. If you have any suggestions for improving the design or if any information is missing from
the instructions, please send your suggestions to [e-mail].

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Information About the Product
2 Information About the Product
2.1 Product identication
NOTE
■Designs with manufacturer-compatible connectors as well as models with customer-
specific blind zones are available on request.
■LTX…M-F10-SSI2-GAF1-X3-H1161 devices are the preferred type.
LTX 100 M Magnetostrictive
position sensor –
Unit
M Millimeter
E Inch
Measuring range
100 from 25 to 7500 mm
or 1 to 300“
Operating principle
LTX Linear position sensor
LTX 100 M – F10 – SSI 2 – G A F 1 – X3 – H1 1 6 1
F10 Design –
Design
F10 Flat face, rod Ø 10.3 mm,
sensor head made from
aluminum*
R10 Raised face, rod Ø 10.3 mm,
sensor head made from
aluminum
EF10 Flat face, rod Ø 10.3 mm,
sensor head made from
stainless steel
ER10 Raised face, rod Ø 10.3 mm,
sensor head made from
stainless steel
SSI 2 – G A F 1 – X3 Electrical version –
Number of LEDs
X3 3-color LED
Resolution
10.005 mm*
20.01 mm
30.05 mm
40.1 mm
50.02 mm
60.002 mm
70.001 mm
Direction
Fforward*
Rbackward
Vvelocity
Data type
Ssynchronous
Aasynchronous*
Data format
Bbinary
Ggray*
Data length
124 bit
225 bit*
326 bit
Data mode
H1 1 6 1 Electrical connection:
Male
Assignment
1Standard assignment
Number of contacts
66-pin
Connector type
1straight
Connector type
H1 Male connector M12 x 1
* Preference type

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2.2 Scope of delivery
The following are included in the scope of delivery:
■Linear position sensor (without positioning element)
■Quick Start Guide
2.3 Legal requirements
The device is subject to the following EU directives:
■2014/30/EU (electromagnetic compatibility)
2.4 Manufacturer and service
Turck provides you with support and assistance for your projects — from the initial analysis to
commissioning your application. The Turck product database contains software tools for pro-
gramming, configuration and commissioning, as well as data sheets and CAD files in numerous
export formats. You can access the product database at the following address:
www.turck.de/products/
Should you have any further questions, please contact the sales and service team in Germany
on the following telephone numbers:
Sales: [phone]
Technology: [phone]
Outside Germany, please contact your Turck representative.
Hans Turck GmbH & Co. KG
Witzlebenstraße 7
45472 Mülheim an der Ruhr
Germany
3 For your Safety
The product is designed in accordance with the latest standards. However, residual risks still
exist. Observe the following warnings and safety information to prevent personal injury or
damage to property. Turck accepts no liability for damage caused by failure to observe these
warning and safety instructions.
3.1 Intended use
The devices are intended solely for use in industrial areas.
The magnetostrictive linear position sensors are used for contactless and wear-free linear posi-
tion detection. The devices are suitable for use in hydraulic cylinders. By adding float magnets
(available as an option), the devices can also be used for level measurement. The measuring
range is adjustable.
The devices must be used only as described in these instructions. Any other use is not in accor-
dance with the intended use. Turck accepts no liability for any resulting damage.

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For your Safety
3.2 General safety information
■The devices are not safety components and must not be used for personal or property
protection.
■The device must be mounted, installed, operated, parameterized and maintained only by
trained and qualified personnel.
■The device complies exclusively with the EMC requirements for industrial applications and is
not suitable for use in residential areas.

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4 Product Description
The linear position sensors with SSI interface provide a serial synchronous interface output
signal (SSI) proportional to the position of the positioning element. Different device variants
enable the following measuring functions to be performed:
■Position measurement, forward measuring direction
■Position measurement, backward measuring direction
■Speed measurement
The devices can be connected using an M12 plug connector. All devices feature a rod design
with IP68 protection. The devices operate without contact, which requires the use of a position-
ing element approved by Turck (see Accessories).
The devices operate on an absolute basis; power outages do not necessitate renewed zero off-
set adjustment or recalibration. All position values are determined as absolute values; reference
runs after a voltage drop are unnecessary.
4.1 Device overview
Fig. 1: Device dimensions of LTX…M… with standard blind zones (in mm)
4.1.1 Display elements
Each device has a 3-color LED for indicating the operating state and for fault diagnostics (see
8.1 LED display).
24
44.5
ø 44.5
ø 10.3
10
M18 x 1.5 x 25
M12 x 1
81.3
L
63.5
Blind zone
50.8
Blind zone
Measuring
range

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Product Description
4.2 Properties and features
■SSI output
■Automatic signal control
■7…30 VDC supply voltage
■Low power consumption
■High shock and vibration resistance
■Protection class IP68
■16-bit resolution
■Status display via 3-color LED
■Sensor and pressure pipe can be replaced separately
■M12 connector
4.3 Operating principle
Turck LTX sensors utilize the magnetostrictive principle. A "waveguide" is located in the measur-
ing probe of the linear position sensor. If a current signal generated at the waveguide encoun-
ters the externally applied magnetic field of the positioning element, mechanical feedback is
produced in the waveguide. This feedback is evaluated in the sensor head and output as posi-
tion information.
4.4 Functions and operating modes
The devices have an SSI interface according to the RS422 standard. The process value is trans-
ferred via the interface either directly to the higher-level controller (with SSI card) or to a field-
bus device.
Fig. 2: Block diagram of the sensor control
The location of the positioning element on the sensor measuring probe is determined by
means of a propagation time measurement and transmitted to the controller via the SSI inter-
face. All position values are determined as absolute values; reference runs after a voltage drop
are unnecessary.
+7…30 V
0 V
SSI Clock (+)
SSI Clock (–)
SSI Data (+)
SSI Data (–)
Input
Power
Supply
SSI Shift Register and Controller
Output Data Format Conversion
SSI Logic Diagram
Position Measurement

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New incoming position data is transferred via the data signal 605 ns after the rising edge of the
clock signal. This time frame, including the elapsed time caused by the length of the cable, must
be factored in when defining the transmission rates.
Fig. 3: SSI pulse diagram: Bitwise transmission from most significant bit (MSB) to least signifi-
cant bit (LSB)
4.4.1 Automatic signal control
The device is automatically adjusted to the signal strength of the positioning element as soon
as the sensor is supplied with power. The automatic signal control fully compensates for any
tolerances.
4.4.2 Update mode
The devices can be operated in synchronous or asynchronous update mode. In asynchronous
mode, up to 2000 measurements (depending on length, see also the "Update time" section) can
be carried out per second to update the position values. In synchronous mode, the clock rate
for the update depends on the controller (max. 2000 measurements per second, depending on
length). If the controller queries the position data on the sensor faster than the data is provided
by the sensor, the sensor automatically switches from synchronous to asynchronous mode and
continues to provide the latest position information to the controller.
NOTE
Turck recommends operating the device in asynchronous update mode, if no highly
dynamic control requirement is involved.
Fig. 4: Synchronous and asynchronous update mode
min. 16 µs
Clock (+)
Data (+)
Clock Interval
LSBMSB
SSI Clock
Synchronous
Asynchronous
Controller
Update
Internal
Repetition
Update
Position
Update
Position
Update
Position
Update
Position
Update
Position
Update
Position
Update
Position

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Product Description
Synchronous update mode
The clock pulse rate of the controller sets the frequency for reading the position data. The sen-
sor transmits one position data bit to the controller with each pulse. The first clock edge of the
controller signals the sensor to carry out a new position measurement. The updated position
data is transferred in the next read cycle.
NOTE
In synchronous mode, the position data available to the controller is no more than one
update cycle old.
Asynchronous update mode
The sensor carries out position measurements according to a fixed internal request rate (sensor-
internal measurement cycle) and provides the position information when requested by the
controller.
4.4.3 Measuring functions
Different device variants are available for performing different measuring functions:
Device type Measuring function
LTX…SSI…F… Position, forward measuring
direction
The position value is incremented during the
movement along the measuring probe starting
from the sensor head.
LTX…SSI…R… Position, backward measuring
direction
The position value is incremented during the
movement in the direction of the sensor head
starting from the end of the measuring probe.
LTX…SSI…V… Speed measurement The sensor provides speed information directly.
4.4.4 Preferred type LTX…M-F10-SSI2-GAF1-X3-H1161 – Measuring range
Preferred types LTX…M-F10-SSI2-GAF1-X3-H1161 are available with the following measuring
lengths as standard:
Measuring range congured
100…500mm in 25mm increments
500…2000mm in 50mm increments
2000…7600mm in 500mm increments

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4.5 Technical accessories
The following accessories are not supplied with the device:
Dimension drawing Type Ident no. Description
Positioning element
ø 32,8
ø 23,8
ø 4,7
ø 13,5
16,8
7,9
STM-AL-R10 6900409 Standard 4-hole positioning element, alu-
minum, suitable for mounting in hydraulic
cylinders
ø 25,4
7,9
ø 13,5
CM-R10 6900416 Standard positioning element, suitable for
mounting in hydraulic cylinders










LSPM-AL-R10 6900414 Ring-type positioning element with slot,
aluminum, can be used for external mount-
ing with mounting clamp RB-R10
50,8
ø 14,1
ø 50,8
max.
ø 52,1
EF-R10 6900417 Float-positioning element, stainless steel,
specific weight 0.62 kg/m³, for external
mounting for level monitoring
Spacer
ø 32,8
ø 23,8
ø 4,7
ø 13,5
16,8
6,4
STS-R10 6900411 Standard spacer produced from non-ferritic
material for separating the positioning ele-
ment from the ferritic base of the hydraulic
piston rod, suitable for installation in hydrau-
lic cylinders
Accessories for external mounting
#6-32
ø 7,1
31,7
23,8
50,8
76,2
25,4
15,7
50,8
ø 14,2 MMB-R10 6900004 Mounting clamp for positioning element, for
external mounting, with screws and standard
STS-R10 spacer

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Product Description
Dimension drawing Type Ident no. Description
50,8
19,3
12,7
ø 12,2
ø 10,5
50,8
26,2
ø 7,1
ø 7,1
31,7
50,8
76,2
25,4
15,7
50,8
ø 19,5 MB-R10 6900419 Mounting clamp for sensor head and rod, for
external mounting, with screws
50,8
19,3
12,7
ø 12,2
ø 10,5
50,8
26,2
ø 7,1
RB-R10 6900420 Mounting clamp for rod, for external mount-
ing, with screws
Connection cables
M12 x 1ø15
42
L
50
5
RKC6T-2/S618 U5311-51 2 m connection cable, M12 female connector,
6-pin, PVC, shielded
M12 x 1ø15
42
L
50
5
RKC6T-6/S618 U99-11853 6 m connection cable, M12 female connector,
6-pin, PVC, shielded

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5 Mounting
The device can be mounted in a hydraulic cylinder or externally with a mounting bracket.
CAUTION
Incorrect mounting
Risk of damage to the sensor
 Secure the device in place using only the hexagon nut on the sensor head (max.
tightening torque: 50Nm).
 Do not fasten by turning the sensor head itself.
 Ensure that the positioning element is guided centrally over the pressure pipe along
the entire measuring length (deviation < 0.5mm).
Fig. 5: Side view of LTX-R10 with dimensions in mm [in] (design with raised face)
Fig. 6: Design with flat face (F10) – Housing nut with thread,
dimensions in mm [in]
Fig. 7: Design with raised face (R10) – Housing nut with thread,
dimensions in mm [in]
81.3 [3.20]
2.5 [.10]
7.1 [.28]
ø 25.4 [1.00]
ø 44.5 [1.75]
7.9
[.31]
ø 10.3 [.405]
32.8 [1.28]
M12 x 1 3-color LED
LTX…M: M18x1.5-6gx25mm thread
w/jam nut
LTX…E: 3/4-16x1.00 thread
w/jam nut
Viton O-ring
for 1/2“ dia
tube boss seal
Span 63.5 [2.50] Dead band
50.8 [2.00] Null
Standard 4-hole positioning element
(STM-AL-R10)
9.6
[.38]
2.5 [.10]
7.1 [.28]
ø 25.4 [1.00]

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Mounting
5.1 Mounting the device in a hydraulic cylinder
CAUTION
Incorrect mounting
Risk of damage to the hydraulic cylinder
 Observe the instructions from the cylinder manufacturer and the hydraulic cylinder
specifications.
The devices can be mounted directly in a hydraulic cylinder. To do so, the cylinder piston rod
must have a bore hole with a recommended diameter of 13.5mm (depending on the cylinder
design). To fasten the device, the end cap of the hydraulic cylinder must have an M18×1.5
threaded bore in accordance with ISO 6149-1.
5.1.1 Mounting the sensor
 Loosen and remove the hexagon nut on the sensor from the thread on the sensor head.
 Ensure that the pressure seal O-ring is located on the sensor head.
 Mount the non-ferrite spacer between the positioning element and base of the piston rod.
 Mount the positioning element. Observe a minimum distance of 51mm between the posi-
tioning element and sensor head with the piston rod in the retracted position. If the mini-
mum distance cannot be observed, sink the positioning element in the cylinder piston.
 Recommended for sensors with measuring probe lengths ≥ 1500mm: use protecting ring,
e.g. made of polymer (see Fig. 8, no. 2). The protecting ring prevents mechanical wear of posi-
tioning elements by the pressure pipe when the piston is fully extended.
 Fasten the positioning element and spacer with non-ferrite screws.
 Remove protective cap on the hydraulic cylinder (if present). The bore hole in the cylinder
piston rod should have a minimum diameter of 13.5mm.
 Insert the sensor pressure pipe into the cylinder piston.
 Screw the sensor into the M18×1.5 threaded bore of the hydraulic cylinder using the thread
of the sensor head (max. tightening torque: 50Nm).
23
4
5
1
1 Viton O-ring
2 Protecting ring
(optional)
3 4-hole positioning
element
4 Spacer for positioning
element
5 13.5mm bore hole in
the cylinder piston rod
Fig. 8: Mounting the device in a hydraulic cylinder

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5.2 Fastening the device externally with a mounting bracket
CAUTION
Magnetization of metal in close proximity with the measuring probe
Inaccurate measurements
 Mount the sensor measuring probe at least 7mm away from ferromagnetic material.
NOTE
Non-ferrous materials, such as brass, copper, aluminum, demagnetized stainless steel
or plastic do not impair the function of the sensor.
 Loosen the hexagon nut on the thread of the sensor head.
 Guide the mounting bracket over the pressure pipe up to the sensor head.
 If the mounting bracket has an M18×1.5 threaded hole, screw the sensor directly.
 Fasten the mounting bracket.
 Re-fasten the hexagon nut on the sensor head.
Fig. 9: Mounting the device with mounting brackets (dimensions in mm)
MB-R10
MMB-R10
RB-R10
ø 7.1 [0.28]
32 [1.26]
25.4 [1.00]
7 × 26
[0.28 × 1.02]
11 [0.43]
50.8
[2.00]
50.8
[2.00]

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Mounting
5.2.1 Fitting additional mounting elements (for external mounting)
On devices over 750mm in length, additional mounting elements (RB-R10) increase protection
against mechanical stresses such as impacts and vibrations. The mounting elements must be
made from non-ferrite material.
 When using additional mounting elements, use a ring-type positioning element with slot as
the positioning element.
 Fit mounting elements made from ferromagnetic (already magnetized) material at least 7mm
away from both the blind zone and the active measuring range of the sensor.
 Sensors with measuring probe lengths of 750…1800mm: Fit additional mounting elements
as per Fig. 10.
 Sensors with measuring probe lengths > 1800mm: Fit mounting elements at distances of
1200mm.
5.2.2 Mounting positioning elements (for external mounting)
 Maintain a distance of 7mm between the positioning element and ferrite material. Use a
spacer if necessary.
 Maintain a distance of 7mm between the end of the measuring probe and ferrite material.
The positioning element must not touch the sensor along the entire measuring range.
 When using ring-type positioning elements with slot: Observe ≤ 5mm distance between the
positioning element and measuring probe (nominal distance: 1.5mm).
 Push the positioning element into the active measuring range of the sensor.
 Fasten the positioning element with non-ferrite screws.
50.831.8
25.4
11
7.1
25.4
26.2
16.9
36
25.4
15.7
ø 7.1 (2x)
31.8
50.8
50.8
50.8
ø 7.1 (2x)
1
2
34
6
Dead bandStrokeNull
1 Sensor
2 Mounting element for
sensor head
3 4-hole positioning ele-
ment (aluminum)
4 Spacer for positioning
element
5 Mounting element for
positioning element
6 Mounting element for
measuring probe
Fig. 10: Mounting the positioning element (dimensions in mm)

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6 Connection
CAUTION
Couplings on the sensor cable
Sensor fault
 Do not route sensor cables close to high-voltage power supplies.
NOTE
 Keep the length of the connection cables as short as possible.
 Use shielded connection cables.
 Keep sensor cables away from the high-power AC cables and motor drive cables.
 Do not connect or disconnect the sensor when energized.
The running lengths of the connection cables are limited and depend on the SSI clock frequen-
cies. Different clock rates are recommended depending on the length of the connection cables.
The clock rate and data frame lengths are set by the master.
Cable length [m] Baud rate
< 3 1 MBd
< 50 < 400 kBd
< 100 < 300 kBd
< 200 < 200 kBd
< 360 < 100 kBd
 Route high-voltage and low-voltage cables separately.
 Connect the female connector of the connection cable to the connector on the device.
 Connect the sensor to the higher level as per the pin assignment (Fig. 11).
6.1 Wiring diagram
NOTE
The following figure details the usual wire colors. In exceptional cases, this color as-
signment may differ.
Pin Pin assignment Wiring diagram
Pin 1 UB +

 
 





 
 
 



 
Pin 2 Data +
Pin 3 GND
Pin 4 Data -
Pin 5 Clock -
Pin 6 Clock +
Fig. 11: Wiring diagram

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Commissioning
7 Commissioning
NOTE
If the device is part of a closed system that has not yet been fully configured, the
system may move in an uncontrolled manner the first time the supply voltage is
connected.
Once the cables and the supply voltage are connected, the device automatically goes into
operation. To ensure the correct calibration of the automatic signal control, the positioning ele-
ment must be located in the active measuring range of the sensor when the supply voltage is
connected.
8 Operation
NOTE
The minimum SSI clock rate is 70kHz.
8.1 LED display
Color/status Meaning
Off No power supply present
Illuminated in green Positioning element signal detected in taught range, SSI clock signal
operational
Illuminated in yellow No SSI clock signal detected
Illuminated in red No positioning element signal detected
Red flashing/red-green
flashing
Internal error
Green with brief yellow
flashing (1 s to 0.12 s)
Data not synchronous with controller (only in synchronous mode)
Yellow with brief red flashing
(1 s to 0.12 s)
SSI clock pulses do not match the SSI data length
If no positioning element is detected, the red LED lights up and the device transmits a position
of zero.
Proceed as follows if no positioning element signal is detected (red LED lit):
 Place the positioning element in the active measuring range of the device.
 Reset the voltage.
 The device is automatically adjusted to the signal strength of the positioning element.
If, in synchronous mode, the data is not synchronized with the controller (LED green with brief
yellow flashing, 1 s to 0.12 s), proceed as follows:
 Increase the update time via the module settings of the SSI master.