Balluff MICROPULSE Series User manual

www.balluff.com
Technical Description / User’s Guide
Micropulse Linear Transducer
Absolute Quadrature Outputs
Rod Style and Profile Style Housings

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2
Micropulse Linear Position Transducer
Absolute Quadrature Output
Rod Style & Profile Style Housings
The CE Mark verifies that our
products meet the requirements
of the current EMC Directive
and the EMC Law. Testing in our EMC
Laboratory, which is accredited by DATech
for Testing Electromagnetic Compatibility,
has confirmed that Balluff products meet
the EMC requirements of the following
Generic Standards:
EN 61326-2-3 (immunity and emission)
Emission tests:
RF Emission
EN 55011 Group 1, Class A
Noise immunity tests:
Static electricity (ESD)
EN 61000-4-2 Severity level 3
Electromagnetic fields (RFI)
EN 61000-4-3 Severity level 3
Fast transients (Burst)
EN 61000-4-4 Severity level 3
Table of Contents
Introduction & Approvals..................................................................2
Electrical Data/Specifications & Wiring.............................................3
Mechanical Dimensions/Installation – Rod Style Housing .................4
Accessories – Rod Style Housing ....................................................5
Mechanical Dimensions/Installation – Profile Style Housing..............6
Accessories – Profile Style Housing .................................................6
Operating Instructions & Operating Modes ......................................7
Strobe Input Functionality ................................................................8
Speed Constraints...........................................................................9
Ordering Information......................................................................10
Magnetostrictive Technology Overview ..........................................11
Introduction
The Micropulse Absolute Quadrature Output linear transducer is a magnetostrictive linear displacement
transducer that provides electrical output signals in ABZ quadrature format.
In addition to providing industry-standard quadrature output signals, the Micropulse Absolute Quadrature
transducer provides absolute position information through its innovative BURST function. Upon request
from the PLC or controller, the transducer sends a burst of pulses equal to absolute position of the marker
magnet. This eliminates any need to perform a physical re-homing procedure after a power loss (see p. 8
for details on using BURST mode).
The Micropulse Absolute Quadrature transducer is available in two form factors:
The Z rod style is designed for use in hydraulic and pneumatic cylinders.
The stainless steel pressure tube is rated for 8700 psi, and the mounting
threads (3/4-16 UNF or M18 x 1.5) allow the Zstyle to be integrated into
specially prepared cylinders. A donut-shaped or slotted magnet, attached
to the piston face, provides position feedback. The Zstyle can also be
used for external-mount applications.
The Pprofile style’s rugged extruded aluminum housing makes it a perfect
choice for external-mount applications. Either a free-floating magnet or a
captive, sliding magnet can be used – offering maximum flexibility to meet
the needs of a wide variety of applications.
Surge
EN 61000-4-5 Severity level 2
Line-induced noise induced by
high-frequency fields
EN 61000-4-6 Severity level 3
Magnetic fields
EN 61000-4-8 Severity level 4

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Micropulse Linear Position Transducer
Absolute Quadrature Output
Rod Style & Profile Style Housings
Wiring
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Electrical Data Z Rod Style Housing PProfile Style Housing
Output RS422-level A & B Quadrature with Z marker pulse
Fixed Pulse Frequency
(selectable via ordering code)
833 kHz (3.33 MHz quadrature)
416 kHz (1.66 MHz quadrature)
208 kHz (833 kHz quadrature)
10 kHz (40 kHz quadrature)
Output Update Rate:
Free-Running Mode
(selectable via ordering code)
1 ms, 2 ms, or 4ms
Synchronous Mode User-defined (500 µsec to 10 ms)
Non-Linearity
For Stroke ≤500mm +/- 100 µm (0.0039")
For Stroke >500mm +/- 0.02% of full scale
Resolution 1, 2, 5, 10, 50 µm or 0.0001, 0.0005, 0.001"
(ordering code dependent)
Hysteresis +/- (2x resolution) or 5 µm (whichever is greater)
Repeat Accuracy resolution + hysteresis
Supply Voltage + 24 Vdc (+/- 20%) +10 to +30 Vdc
Current Draw < 100 mA ≤175 mA @ 10 Vdc
≤100 mA @ 30 Vdc
Operating Temperature -40 to +85° C
Storage Temperature -40 to +100° C
Temperature Coefficient (6 µm + 5ppm x stroke length) / °C
Mechanical Data
Housing Material Anodized Aluminum
Rod Material 316 Ti stainless steel n/a
Mounting Threads 3/4" -16 UNF n/a
Protection Class IP67
Shock Rating 100 g/6 ms per IEC 60068-2-27
Vibration 12g, 10 to 2000 Hz per IEC 60068-2-6
Electrical Data
BKS S140-__*
Mating Connector
* Specify cable length in
meters or "00" for no
cable.

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Micropulse Linear Position Transducer
Absolute Quadrature Output
Rod Style & Profile Style Housings
Mechanical Dimensions/Installation – Rod Style Housing
Cylinder Port Dimensions
Jam Nut
BTL5-JAM-NUT
For 3/4" - 16 UNF (Z style)
Order separately if required
Stroke Length 60 mm
Dead Zone
Sensor Rod
O 10.2mm(0.401in)
Piston Head &Rod Assembly
Magnet 12.7mm (0.5 in)Bore
3/4-16UNF-3AThreads
or M18x1.5 Metric Threads.
O-ring
Non-ferrous Spacers
NullZone
50.8mm(2in.)Standard
30 mm (Optional)
Typical Cylinder Installation
Mechanical Dimensions

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Micropulse Linear Position Transducer
Absolute Quadrature Output
Rod Style & Profile Style Housings
Accessories (Order Separately) – Rod Style Housing
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Jam Nut
BTL5-JAM-NUT
Slotted Magnet
BTL5-P-1013-4S
Small Diameter Magnet
BTL5-P-1012-4R
Ring Magnet
BTL5-P-1013-4R

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Micropulse Linear Position Transducer
Absolute Quadrature Output
Rod Style & Profile Style Housings
Mechanical Dimensions/Installation – Profile Style Housing
Accessories (Order Separately) – Profile Style Housing
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PL0001
14
D9
150 +4
68
50
C
38
20
28
Ø4.2
Control Arm
BTL-Z-5-GS08-_ _ _ _*-A
* Specify length in mm
Extended Range
Floating Magnet
BTL5-P-5500-2
Floating Magnet
BTL5-P-3800-2
Lateral offset:
C = ± 15mm
Vertical distance
of magnet:
D = 5...15mm
Lateral offset:
C = ± 2mm
Vertical distance
of magnet:
D = 0.1...4mm
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Swivel Eye
BTL5-SWIVEL-EYE
Mounting Foot
BTL-P-M5-VZ
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Mounting Feet
BTL5 P-M5-VZ
(Order separately)
Captive Sliding Magnet
BTL5-F-2814-1S
(Order separately)
M5x22 Socket Head Screws
(Supplied with mouting feet)
Floating Magnet
BTL5 P-3800-2
(Order separately)

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Micropulse Linear Position Transducer
Absolute Quadrature Output
Rod Style & Profile Style Housings
A
A
B
B
Z
Z
The Micropulse quadrature-output linear transducers
produce an AB quadrature output signal. The A and B
channels are 90° out of phase depending on the direction of
position travel. In addition a programmable Z pulse can be
set anywhere within the active stroke to represent a “home”
or “zero” position. The RS422/RS485 differential line driver
provides each output, along with its complementary signal
(A, A, B, B, Z, Z).
Absolute position information from the transducer is used
to generate incremental position updates. Any change in
linear position causes the appropriate number of pulses to
be delivered to the output. In addition, the absolute position
value can be delivered to the output at any time by using
the STROBE input to create a “burst” of pulses that is equal
to the absolute (relative to the “zero” point) position (see
STROBE instructions below).
Operating Instructions
90° phase shift between A and B
In this example, B lags A by 90°,
indicating FORWARD position change
Operating Modes
The Micropulse quadrature-output linear transducer is capable of operating in the following modes, which
are selected via the ordering code (see pg. 10):
Free-Run Mode – In this mode, the transducer output updates at a periodic rate determined by the
Update Rate parameter in the ordering code. As long as power is applied to the transducer, the
transducer provides a position output. This is the most common mode of operation.
Note – Maximum allowable free-running update rate is limited by transducer stroke length.
Use the following table to determine maximum permissible update rate:
Synchronous Mode – (ordering code Qxxx0) In this mode, the transducer synchronizes itself to an
external controller via the STROBE input. This mode can only be used in conjunction with motion control-
lers that support this function, e.g., Allen-Bradley IMC-S class controllers. For more information, please
consult factory.
Stroke Length (mm) Allowable Update Rates Ordering Code (see page 10)
< 1250 mm 1 ms, 2 ms or 4 ms Qxxx1, Qxxx2, or Qxxx4
1251 to 2500 mm 2 ms or 4 ms Qxxx2 or Qxxx4
> 2500 mm 4 ms Qxxx4

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Micropulse Linear Position Transducer
Absolute Quadrature Output
Rod Style & Profile Style Housings
Function Active Time Notes
Synchronizing
5 μsec to 5
msec
Valid only with synchronous versions (ordering code Qxxx0). In this
mode the internal transducer measurements are synchronized to this
input. The most recent quadrature data is sent out on the rising (active-
to-inactive) edge of this input.
Burst
(Absolute
Position
Query)
100 msec to
1000 msec
(1 sec)
Causes absolute position pulse train to be output. The rising (active-
to-inactive) edge of this input causes a pulse string equal to current
magnet position, referenced to the null point , e.g., 2” from flange face,
to be sent. The location of the programmable Z pulse (see below) is not
considered.
Store Z 1 sec to 5 sec This mode allows the location of the home reference (Z) pulse to be
changed. The rising edge of this input will cause the current magnet
position to be stored as the Z pulse. This setting is stored in non-volatile
memory, so it will be retained after power-off.
Notes:
1. For all Strobe functions, the input is low-active. It is connected to +5V, through a 3.3 kOhm resistor inside the
transducer. The input is active when pulled to 0V (grounded).
2. If the Strobe input is held active (grounded) during transducer power-up, the input is ignored until it goes
inactive. This is a safety feature to prevent unwanted effects (particularly overwriting of the Z pulse position)
in the event of a problem with this input.
Strobe Input Functionality
The active-low “Strobe” input of the Micropulse Absolute Quadrature Transducer performs three
functions:
Absolute Position Output (Burst Mode)
During normal operation, the transducer provides incremental position information. For each position
update, the transducer sends out a number of pulses that represents the change in position since the
previous update. Upon request, however, the transducer is capable of sending out a pulse string that rep-
resents absolute position, relative to the factory-programmed null point. This absolute position request
is called the Burst mode. The burst mode can be used at any time, but is typically used at start-up, or
to periodically verify absolute position. Using the Burst mode effectively eliminates the need to physically
“re-home” a position axis. The Burst mode is activated by holding the STROBE input low for a period of
from 100 milliseconds to 1 second.
Z Pulse Programming
The Z output, sometimes referred to as the marker or index pulse, is only active at one location within the
transducer’s active stroke. The factory default location for the Z pulse is at the Null point (the Null point
is the beginning of the active stroke). The location of the Z pulse is field-programmable, and can be set
anywhere within the active stroke of the transducer. This is accomplished by using the STROBE input.
Holding the STROBE input low for a period of from 1 second to 5 seconds will set the Z pulse at the
current magnet position.

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Micropulse Linear Position Transducer
Absolute Quadrature Output
Rod Style & Profile Style Housings
Resolution 833 kHz 416 kHz 208 kHz 10 kHz
1 µm 3.0 m/sec 1.5 m/sec 0.75 m/sec 0.0375 m/sec
2 µm 6.0 m/sec 3.0 m/sec 1.5 m/sec 0.075 m/sec
5 µm 10 m/sec 7.5 m/sec 3.75 m/sec 0.1875 m/sec
10 µm 10 m/sec 10 m/sec 7.5 m/sec 0.375 m/sec
50 µm 10 m/sec 10 m/sec 10 m/sec 1.875 m/sec
0.0001" 300 in/sec 150 in/sec 75 in/sec 3.75 in/sec
0.0005" 400 in/sec 400 in/sec 375 in/sec 18.75 in/sec
0.001" 400 in/sec 400 in/sec 400 in/sec 37.5 in/sec
If these speed constraints are exceeded, the transducer will not be able to send all of the necessary
pulses to represent a given amount of position change within a single update cycle. Note, however, that
pulses are never “discarded”. The transducer will attempt to output the remaining pulses on the next
update cycle.
Speed Constraints
The absolute maximum traverse velocity for the sensing magnet is 10 meters per second or 400 inches
per second. However, due to the fixed frequency of of the A and B outputs, there are additional
restrictions on maximum traverse velocity. Use the following table to determine maximum allowable
traverse velocity.
Pulse Frequency (Fixed)

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Micropulse Linear Position Transducer
Absolute Quadrature Output
Rod Style & Profile Style Housings
BTL5-Q_ _ _ _-Mxxxx-Z-S140/KA_ _
Ordering Information
Supply Voltage
5 = +10...30 V
xxxx = length in mm
(see chart at right)
Quadrature Frequency
0 = 833 kHz
1 = 416 kHz
2 = 208 kHz
6 = 10 kHz
System Resolution
0 = 1 µm
1 = 2 µm
2 = 5 µm
3 = 10 µm
5 = 50 µm
6 = 0.0001”
Mode/Update Rate
0 = Synchronous
1 = free-running, 1ms update (stroke ≤1250 mm only)
2 = free-running, 2ms update (stroke ≤2500 mm only)
4 = free-running, 4ms update (any stroke length)
Connection Type
S140 = 10 pin MS connector
KA = Integral cable (specify length in meters, e.g. "05" = 5 meters [standard])
Rod Style
BTL5-Q_ _ _ _-Mxxxx-P-S140/KA_ _
inches mm
2 0051
3 0077
3.5 0090
4 0102
5 0127
6 0152
7 0178
8 0203
9 0230
10 0254
11 0280
12 0305
13 0330
15 0381
16 0407
18 0457
20 0508
22 0560
24 0610
26 0661
28 0711
30 0762
inches mm
32 0813
36 0914
40 1016
42 1067
48 1220
50 1270
54 1372
60 1524
66 1676
69 1753
72 1829
78 1981
84 2134
89 2261
98 2490
108 2743
118 2997
126 3200
140 3556
144 3658
148 3759
152 3860
156 3962
Standard Stroke Lengths-Rod Style
(consult factory for additional lengths)
Profile Style
inches mm
2 0051
3 0077
4 0102
6 0152
7 0178
8 0203
9 0230
10 0254
11 0280
12 0305
13 0330
15 0381
16 0407
18 0457
20 0508
22 0560
24 0610
26 0661
28 0711
inches mm
30 0762
32 0813
36 0914
40 1016
42 1067
48 1220
50 1270
60 1524
70 1778
80 2032
90 2286
100 2540
110 2794
120 3048
130 3302
142 3606
148 3759
156 3962
Standard Stroke Lengths-Profile Style
(consult factory for additional lengths)
7 = 0.001”
8 = 0.0005"
7 = 0.001”
8 = 0.0005"
Supply Voltage
1 = +24 V
2 = ±15 V
xxxx = length in mm
(see chart at right)
Quadrature Frequency
0 = 833 kHz
1 = 416 kHz
2 = 208 kHz
6 = 10 kHz
System Resolution
0 = 1 µm
1 = 2 µm
2 = 5 µm
3 = 10 µm
5 = 50 µm
6 = 0.0001”
Mode/Update Rate
0 = Synchronous
1 = free-running, 1ms update (stroke ≤1250 mm only)
2 = free-running, 2ms update (stroke ≤2500 mm only)
4 = free-running, 4ms update (any stroke length)
Housing/Thread
Z = Rod Style 3/4-16 UNF Threads, 50.8 mm null point
B = Rod Style M18x1.5 Threads, 30 mm null point
Connection Type
S140 = 10 pin MS connector
KA = Integral cable (specify length in meters, e.g. "05" = 5 meters [standard])

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Micropulse Linear Position Transducer
Absolute Quadrature Output
Rod Style & Profile Style Housings
The waveguide consists of a special
nickel-iron alloy with 0.7 mm O.D. and
0.5 mm I.D.
A copper conductor is introduced
through the length of this tube. The
start of measurement is initiated by a
short current pulse. This current
generates a circular magnetic field
which rotates around the waveguide.
A permanent magnet at the point of
measurement is used as the marker
element, whose lines of field run at
right angles to the electromagnetic
field.
In the area on the waveguide where the
two fields intersect, a magnetostrictive
effect causes an elastic deformation
of the waveguide, which propagates
along the waveguide in both directions
in the form of a mechanical wave.
The mechanical wave is converted
to an electric signal by the signal
converter. The propagation time of the
mechanical wave is determined by the
position of the permanent magnet and
can be determined to resolutions down
to 1 µm.
Enhanced Magnetostrictive Technology Overview
Initial Pulse Mechanical Wave
Receiver
Signal Converter
Copper
Conductor
Position Marker
with Magnets
Electromagnetic Field
Damping
Mechanical Wave

Doc. no. 883595/Mat. no. 141271 EN
D15; Subject to Modification. Replaces 082004.
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