Headquarters: SIKO GmbH Weihermattenweg 2 79256 Buchenbach Germany Phone+49 7661 394-0

Subsidiary: SIKO Products Asia Pte Ltd 19A, St. Michael's Road #06-05 Singapore 328003 Singapore Phone+65 62979733

Magnetic sensor MSK320

Incremental, digital interface, resolution 12.5 μm, scaling factor 64

Profile MSK320:

  • Max. resolution 12.5 μm
  • max. resolution 0.006° with MR320 or MBR320 (250 poles)
  • Repeat accuracy ±0.04 mm
  • Repeat accuracy of ±1 increment
  • Works with MB320/1 magnetic tape, MRI01 or MR320 magnetic ring, MBR320 magnetic tape ring
  • Reading distance ≤2 mm
  • Max. 16000 pulses/revolution in combination with MR320 or MBR320 (250 poles)
  • Optionally with reference point R or flexible reference marks FR

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Mechanical data
FeatureTechnical dataAdditional information
Housingred plastic A design
steel F design
zinc die-cast

ZM design

Sensor/band reading distance0.1 … 2 mm O, I reference signals
0.1 … 1.5 mm

R reference signal

0.4 … 1 mm FR reference signal
Sensor/ring reading distance0.1 … 2 mm

O, I reference signals

0.1 … 1 mm

R reference signal

Cable sheath

PUR suitable for drag-chain use

4-wire ø4.4-0.4 mm; 5, 6, 8-wire ø5-0.4 mm

Cable bending radius5x cable diameter static
7.5x cable diameter dynamic
Service life of cable>5 million cycles under the following test conditions:
travel range 4.5 m
travel  speed 3 m/s
acceleration 5 m/s2
ambient temperature 20 °C ±5 °C
Electrical data
FeatureTechnical dataAdditional information
Operating voltage24 V DC ±20 %

reverse polarity protected

5 V DC ±5 %

no reverse polarity protection

Current consumption<20 mA

at 24 V DC, unloaded

<75 mA


Output circuitPP, LD (RS422), TTL

PP only at 24 V

Output signalsA, /A, B, /B, I, /I, R, /R, FR, /FR quadrature signal
Output signal level high>UB - 2.5 V PP
>2.5 V LD
>2.4 V TTL
Output signal level low<0.8 V PP
<0.5 V LD
<0.4 V TTL
Jitter<15 %

0.5 mm reading distance

Pulse width of reference signal1 increment(s)
Real-time requirement

speed-proportional signal output

Type of connection

open cable end

plug connector




Signal pattern

Hint The logical condition of signals A and B is not defined in reference to the index signal I or the reference signal R. It can deviate from the signal form.

System data
FeatureTechnical dataAdditional information
Resolution0.04, 0.05, 0.08, 0.1, 0.16, 0.2, 0.8 mm
Scaling factor

1, 4, 5, 8, 10, 16, 20, 64

System accuracy±(0.1 + 0.01 x L) mm, L in m

at TU = 20 °C


at TU = 20 °C

Repeat accuracy ±1 increment(s)
Measuring range
Circumferential speed≤25 m/s

≤3.2 m/s referencing speed

Travel speed≤25 m/s ≤3.2 m/s referencing speed
Ambient conditions
FeatureTechnical dataAdditional information
Ambient temperature-10 … 70 °C
Storage temperature-30 … 80 °C
Relative humidity100 % condensation admissible
EMCEN 61000-6-2 interference resistance / immission
EN 61000-6-4

emitted interference / emission

Protection categoryIP67 EN 60529
Shock resistance500 m/s2, 11 ms

EN 60068-2-27

Vibration resistance100 m/s2, 5 … 150 Hz EN 60068-2-6
Magnetic sensor MSK320
Pin assignment
Not inverted without reference signal
nc 55
nc 66
nc 77
nc  8
nc  9
Inverted without reference signal
nc 33
nc  8
nc  9
Inverted with reference signal
A red 1 1
B orange 2 2
I blue 3 3
+UB brown 4 4
GND black 5 5
A/ yellow 6 6
B/ green 7 7
I/ violet 8 8
nc     9
Hint for mounting
For systems with reference points on the magnetic tape please take care that sensor and strip are correctly aligned (see picture).
Reference signalO, IRFR
A, Sensor/tape reading distance≤2 mm≤1.5 mm0.4 … 1.0 mm
B, Lateral offset±2 mm±0.5 mm±0.5 mm
C, Alignment error±3°±3°±3°
D, Longitudinal inclination±1°±1°±1°
E, Lateral inclination±3°±3°±3°

MSK320 Hint for mounting
symbolic sensor representation

MSK320 Hint for mounting
symbolic sensor representation

Scope of delivery
  • MSK320
  • Mounting instructions
  • Fastening set
Ordering table
Feature Order data Specifications Additional information
Operating voltage
24 V DC ±20 %reverse polarity protected
5 V DC ±5 %
metal housing without status LEDsnot for operating voltage 4 and output circuit LD
roundonly with NI output signal, O reference signal and scaling factor 8
Type of connection
open cable end
bullet connector without mating connector
D-SUB 9-pole without mating connector
extension cables on request
Cable length L
1.0 ... 20 m, in steps of 1 m
others on request
Output circuit
push-pullonly operating voltage 4
only with non-inverted output signal, ≤ 5 m cable length
Output signal
not inverted
invertedonly with A or ZM design and I or R reference signal
Reference signal
periodic indexonly with A or ZM design, index signal every 3.2 mm
fixed referenceonly with A or ZM design, not with scaling factor 1
flexible referenceonly for ZM design and MB320/1 magnetic tape
Linear resolution/ radial scaling factor
0.0125/64, 0.04/20, 0.05/16, 0.08/10, 0.1/8, 0.16/5, 0.2/4, 0.8/1
others on request
Ordering key

MSK320 - A - B - C - D - E - F - G - H

additional accessoriesOrdering key
Flexible reference mark88434

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Anja Wickersheim

Anja Wickersheim
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SIKO Products Asia Pte Ltd

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