Gefran MK4 P Data Sheet

MK4 P (with ONDA technology)

CONTACTLESS MAGNETOSTRICTIVE LINEAR POSITION TRANSDUCER

(PROFIBUS OUTPUT)

Main features

• ONDA technology

• Stroke: 50 to 4000mm

• Position resolution settable via software up to 1 μm

• Speed resolution up to 0.25 mm/sec

• Conforms to CE directives (EN 50081-1 50082-1)

• Vibration-resistant (DIN IEC68T2/6 12 g)

• IP67 protection rating

• Controls up to four cursors simultaneously

• Two M12 connectors for simplified connection to Profibus and
one M8 connector for separate connection to power supply
(transducer can be powered without having to be connected to
bus)

• Local intelligence

• Profibus DPV0 interface on RS485 in conformity to IEC 61158

Contactless absolute linear position transducer with ONDA magnetostrictive technology. The Profibus fieldbus interface integrates in com-

plex systems with long communication distances, guaranteeing rapid and secure data transmission.

The absence of contact on the cursor eliminates all wear and ensures almost unlimited life of the transducer.

Its many advantages include smaller size for easier installation, high protection rating for use in harsh environments, excellent linearity,

repeatability, and resistance to vibration and shock, guaranteeing exceptional reliability.

TECHNICAL DATA

ELECTRICAL DATA

(*) Uses 50V 2J snubber

Model 50 to 4000 mm

Measurement taken Position / Speed

Position read sampling time (typical) 1 ms

Shock test DIN IEC68T2-27 100g - 11ms - single blow

Vibrations DIN IEC68T2-6 12g / 10...2000Hz

Shift speed ≤10 m/s

Max. acceleration ≤ 100 m/s2 shift

Resolution up to 1μm

Cursor type Sliding cursor

Separate floating cursor

Work temperature -40...+85°C

Storage temperature -40...+100°C

Coefficient of temperature 20ppmFS / °C

Protection rating IP67

Output signal Profibus DPV0 on RS485

Rated power supply 10-32 Vdc

Max power supply ripple 1Vpp

Max. draw 2W

Min. load on output RS485 standard

Electrical isolation 500V (*) (D.C. power supply/ground)

Polarity inversion protection YES

Overvoltage protection YES

Self-resetting internal fuse YES

ELECTRICAL / MECHANICAL DATA

Model

Electrical
Stroke (E.S.)

Independent
linearity

Max.
dimensions (A)

Repeatability mm < 0.01 (limited by resolution of output value)

Hysteresis ±%F.S < ± 0.005% FS (0.010 mm minimum)

Sampling time ms 1 (for strokes up to 800) 2 (for strokes from 850 to 2000) 4 (for strokes >2000) (*)

* Note: the sampling time doubles for models using 3 and 4 cursors

±%F.S

50 75 100 130 150 175 200 225 250 300 350 360 400 450 500 550 600 650 700 750 800 850 900 950 1000

1100 1200 1250 1300 1400 1500 1750 2000 2250 2500 2750 3000 3250 3500 3750 4000

mm Model

Typical :≤ ± 0.02 % FS with oating cursor (value depends on distance between cursor and sensor body)

mm Model + 181.7

Typical : ≤ ± 0.01 %FS (min ± 0.060mm) with sliding cursor

MECHANICAL DIMENSIONS

Version MK4PW with sliding magnetic cursor

M5 holes
depth 10

Closing force
< 1.1 Nm

Angle joint

Axial joint

Version MK4PW with floating magnetic cursor

Closing force
< 1.1 Nm

Tolerated
lateral
offset ±2

Note

1) For strokes > 2500mm use sliding or floating cursors at a max. height of 4mm

2) On multicursor versions, the cursors must work at the same distance and temperature and be at least 75 mm apart