Gefran MK4 S Data Sheet
TECHNICAL DATA
MK4 S (with ONDA technology)
CONTACTLESS MAGNETOSTRICTIVE LINEAR POSITION TRANSDUCER
(SYNCHRONOUS SERIAL OUTPUT)
Main characteristics
• ONDA technology
• Optimised mechanical structure
• Strokes from 50 to 4000 mm
• Fast installation by mean of steel brackets
• Sliding or floating magnetic cursor
• Synchronous Serial Interface direct to controllers
• Output data resolution available from 1 to 40 μm
• Data format: binary or Gray code; incremental/
decremental
• Power supply 10...32 Vdc
• Resistance to vibration (DIN IEC68T2/6 12g)
• IP67 protection
• Work temperature: -30...+90°C
Contactless linear position transducer with ONDA magnetostrictive technology, with RS422-SSI digital output interface.
The absence of electrical contact on the cursor eliminates all
wear and guarantees almost unlimited life.
Compact size for simple installation.
Full protection against outside agents for use in harsh environments with high contamination and presence of dust.
Excellent linearity, repeatability, resistance to mechanical vibrations and shocks.
Model from 50 to 4000 mm
Measurement taken displacement
Position read sampling time
(typical)
Shock test DIN IEC68T2-27 100g - 11ms - singolo colpo
Vibrations DIN IEC68T2-6 12g / 10...2000Hz
Displacement speed ≤10 m/s
Max. acceleration ≤ 100 m/s
Output data resolution available 1, 2, 5, 10, 20, 40 μm
Cursor (see note)
Working temperature -30...+90°C
Storage temperature -40...+100°C
Coefficient of temperature 20 ppm FS / °C
Protection IP67
Note 1) For stroke > 2500mt use sliding or floating cursors with
max. distance of 4mm
Floating separate cursor
1 ms
2
spostamento
Sliding cursor
ELECTRICAL DATA
Output signal
Data length 24 - 25 bit
Nominal power supply 10...32 Vdc
Max. power ripple 1Vpp
Max. input 50mA
Output load RS422/485 standard
Electrical isolation
Protection against polarity
inversion
Protection against overvoltage Yes
Self-resetting internal fuse Yes
Synchronous Serial (SSI);
Binary/Gray;
Incremental/Decremental
500V (*)
(D.C. supply/earth)
Yes
MECHANICAL DIMENSIONS
MK4S with sliding magnetic cursors
Holes M5
depth 10
MK4S with floating magnetic cursor
Angle
Joint
Closing force
Allowed lateral deviation ±2
< 1.1 Nm
Conn. output. Conn. output
Axial
joints
B-C-D H
(*) it includes a 50V 2J voltage suppressor
ELECTRICAL / MECHANICAL DATA
Model
Electrical stroke
(E.S.)
Independent
linearity
Max. dimensions
(A)
150 175 200 225 250 300 350 360 400 450 500 550 600 650 700 750 800 850 900
1301007550
mm Model
± %F.S.
Typical : ≤ ± 0,01 %FS (min ± 0,060 mm) with sliding cursor
Typical : ≤ ± 0.02% FS with oating cursor (value depending on the distance between the cursor and the sensor body)
mm Model + 154 mm
1750 2000 2250
950
1000
2500
1100
2750 3000 3250 3500
Repeatability mm < 0,01 (limited by the resolution of the output value)
Hysteresis < ± 0,005% FS (min 0,010 mm)
Sampling time ms 1 (for stroke from 1000) 2 (for stroke from 1100 to 2000) 4 (for stroke >2000)
ELECTRICAL CONNECTIONS
OUTPUT MK4S COUTPUT MK4S B OUTPUT MK4S H OUTPUT MK4S F/R
OUTPUT MK4S D
1250 1300 1400
1200
1500
3750 4000
Function MK4S B MK4S C MK4S D MK4S H MK4S F MK4S R CAV00X
Data - 1 5 1 5 Orange Pink Green
Data + 2 2 2 2 Orange / White Blue Gray
Clock + 3 1 3 3 Green / White Gray Pink
Clock - 4 3 4 1 Green Yellow Yellow
Power supply + 5 7 5 7 Blue / White Green Brown
Power supply GND 6 6 6 6 Blue Brown Blue
n.c. - 8 7 8 - - White
n.c. - 4 - 4 - - Red
6-pin M16 8-pin M16 7-pin M16 8-pin M12 Cable output PUR cable output Optional 8-pin cable
The transducer case must be grounded with the cable sheathing on the control system side only.
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