Gefran MK4 A Data Sheet
MK4 A (with ONDA technology)
CONTACTLESS MAGNETOSTRICTIVE LINEAR POSITION TRANSDUCER
(ANALOG OUTPUT)
TECHNICAL DATA
Model From 50 to 4000 mm
Measurement taken Displacement / Speed
Position read sampling From 0,5 ms to 3 ms
time (typical) (depending on stroke)
Speed measurement range min 0 .. 0,1 m/s
max 0 .. 10 m/s
Accuracy speed < 2% (in all F.S. )
Shock test DIN IEC68T2-27 100g - 11ms - single shock
Vibrations DIN IEC68T2-6 12g / 10...2000Hz
Displacement speed ≤10 m/s
Max. acceleration ≤ 100 m/s2 displacement
Resolution 16 bit
(max electrical noise 5 mVpp)
Cursor (see note) Sliding cursor
Floating separate cursor
Working temperature -30...+75°C
Storage temperature -40...+100°C
Coefficient of temperature 0.005% F.S. / °C
Protection IP67
Note: 1) For strokes > 2500 mt use sliding or floating cursors with max.
distance of 4mm
2) For multi-cursor versions, the cursors have to work under the
same distance and temperature conditions
ELECTRICAL DATA
Output signal 0...10V (N/P/Y) 4...20mA (E/F/H)
0...20mA (B/C/D)
Nominal power 24 Vdc ±20% 24 Vdc ±20%
supply
Max. power ripple 1Vpp 1Vpp
Max. consumption 70mA 90mA
Max. output load 5kΩ < 500Ω
Max. output noise < 5mVpp < 5mVpp
Max. output value 12V 30mA
Alarm output value 10.5V 21mA
Electrical isolation 500V (*) 500V (*)
Protection against Yes Yes
polarity inversion
Protection against Yes Yes
overvoltage
Protection against Yes Yes
power supply in output
(*) It includes a 30V 0,4J voltage suppressor
Main characteristics
• ONDA technology
• Optimised mechanical structure
• Strokes from 50 to 4000mm
• Sliding or floating magnetic cursor
• Availability of several analogue outputs (voltage or current)
for direct position and speed measurement or reverse
measurement (only position)
• Single or double cursors models availability
• Power supply 24Vdc ±20%
• Resistance to vibration (DINIEC68T2/612g)
• IP67 protection
• Work temperature: -30...+75°C
Contactless linear position transducer with ONDA magnetostrictive technology.
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.
MECHANICAL DIMENSIONS
MK4A with sliding magnetic cursors
Holes M5
depth 10
MK4A with floating magnetic cursor
angle
Joint
Closing force
Allowed lateral deviation ±2
< 1.1 Nm
Conn. output Conn. output
B-C A-H
Axial
joints
ELECTRICAL / MECHANICAL DATA
2250
150
Model
175 200 225 250 300
Sampling time ms 0,5 1 1,5 2 3
Electrical stroke mm Model
Independent linearity ±%F.S. Typical : ≤ ± 0,01 % FS (min ± 0,060 mm) with sliding cursor
max : ≤ ± 0,02 % FS with floating cursor at a distance between 2 and 5 mm
max : ≤ ± 0,04 % FS with floating cursor at a distance between 5 and 7 mm
Max.dimensions (A) mm Modell +154
Repeatability mm <0,01 (limited by the resolution of the output value)
Hysteresis mm <0,01 (limited by the resolution of the output value)
1301007550
350 360 400 450 500 550 600 650
700 750 800 850 900
950
1000
1100
1250 1300 1400
1200
1500
1750 2000
2500 2750 3000 3250 3500
ELECTRICAL CONNECTIONS
OUTPUT MK4A BOUTPUT MK4A A OUTPUT MK4A C OUTPUT MK4A H
OUTPUT MK4A F
3750 4000
CONNECTORS CABLES OPTIONAL CABLES FOR
Function MK4A-A MK4A-B MK4A-C MK4A-H MK4A-F MK4A-A MK4A-H
5 pin M12 6 pin M16 8 pin M16 8 pin M12 Standard pre-assembled pre-assembled
cable 5 pin 8 pin
Output cursor 1
0...10V
4...20mA 1 1 5 (1*) 5 Grey Brown Green
0...20mA
GND
Output cursor 1 2 2 2 1 Pink White Yellow
(0V)
Inverse output cursor 1
Output cursor 2
Output speed
0...10V 3 3 3 3 Yellow Blue Pink
4...20mA
0...20mA
GND
Output cursor 1
Output cursor 2 2 4 6 2 Pink White Grey
Output speed
(0V)
Power supply+ 5 5 7 7 Brown Grey Brown
Power supply GND 4 6 8 6 White Black Blue
n.c. - - 4 4 - - Red
n.c. - - 1(5*) 8 - - White
(*) = for version 4...20mA / 0...20mA
The transducer case must be grounded with the cable sheathing on the control system side only.
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