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Magnetic Encoder

M Sense B

The M Sense B magnetic encoder provides a high degree of accuracy ideal for applications requiring accurate positioning and closed loop motion feedback. It is available with a wide range of resolution up to 1024 lines and comes with an integrated line driver.

Motor Highlights

  • Compatible with Brush DC motor frame sizes from 16mm to 35mm
  • Accuracy up to 1.5 degrees
  • Integrated RS422 line driver
  • Resolution up to 1024

Customization Available

  • Axial and radial cable output available
  • Output cables direction
  • Cables and connectors output
  • Low temperature version (-40°C)

Applications

Specification + Detail
Resources
Metric English 
Winding{%|%}unit M Sense B
Diameter{%|%}in
Diameter{%|%}mm
Nominal Voltage{%|%}V
Optimization (rpm)
No-Load Speed{%|%}rpm
Type Magnetic
Resolution{%|%}line counts 1…128,256,512,1024
Supply Voltage{%|%}V 4.5 / 5.5
Supply Current - typical{%|%}mA 16
Supply Current - maxium{%|%}mA 23
Supply Current - stand-by{%|%}μA
Rise time{%|%}ns
Fall time{%|%}ns
No-Load Current{%|%}mA
Max continuous mechanical power (@ 25°C)
Max continuous Current (A)
Max Continuous Torque (mNm)
Max Continuous Torque (oz-in)
Terminal Resistance{%|%}Ω
Output Power{%|%}W
Stall Torque{%|%}oz-in
Stall Torque{%|%}mNm
Efficiency{%|%}%
Speeds up to{%|%}rpm
Torque up to{%|%}oz-in
Torque up to{%|%}mNm
Current up to, thermal limits{%|%}Amp
Back-EMF Constant{%|%}V/1000 rpm
Torque Constant{%|%}mNm/A
Torque Constant{%|%}oz-in/A
Motor Regulation R/k² (10³/Nms)
Motor regulation k/R½ (mNm/W)
Motor regulation k/R½ (oz-in/W)
Internal resistance - phase to phase (W)
Line to Line resistance at connectors (Ω)
Inductance - phase to phase (mH)
Friction Torque{%|%}oz-in
Friction Torque{%|%}mNm
Rotor Inductance{%|%}µH
Mechanical Time Constant{%|%}ms
Rotor Inertia{%|%}gcm²
Rotor Inertia{%|%}gcm²
Thermal Resistance{%|%}C/W
Thermal Time Constant{%|%}C/W
Weight{%|%}oz
Weight{%|%}g
Absolute accuracy 2 ph. On, Full step mode (degree)
Ambient working temperature range (C)
Ambient working temperature range (F)
Bearing Type
Detent Torque, Max (mNm)
Detent Torque, Max (oz-in)
Dielectric Withstanding Voltage (VAC)
Holding Torque, MIN (mNm)
Holding Torque, MIN (oz-in)
Inductance per Phase, typ (mH)
Insulation Resistance at 500 VDC (Mohms)
Leadwire
Maximum Coil Temperature (C)
Maximum Coil Temperature (F)
Operating Voltage (VDC)
Rated Current per Phase, 1 Phase ON (A)
Resistance per Phase, ± 10% (Ohms)
Rotor Inertia (oz-in-sec²10{%SUP%}-6{%/SUP%})
Electrical time constant (ms)
Max motor speed (rpm)
Ambient storage temperature range (C)
Ambient storage temperature range (F)
Ball bearings preload (N)
Axial static force without shaft support (N)
Max winding temperature (C)
Max Winding Temperature (C)
Max Winding Temperature (F)
Max winding temperature (F)
Hall Sensor Elecrical Phasing (degree)
Typical Housing Material
Continuous Stall Current (A)
Peak Torque for 1s (mNm)
Peak Torque for 1s (oz-in)
Peak Current (A)
Max Axial Shaft Load (N)
Max Axial Shaft Load (oz)
Max Radial Shaft Load (N)
Max Radial Shaft Load (oz)
Shaft Load Max Axial (lb)
Shaft Load Max Axial (N)
Shaft Load Max Radial (lb)
Shaft Load Max Radial (N)
Length (in)
Length (mm)
Steps per Revolution
Back EMF Amplitude (V/ksteps/s)
Nominal Phase Current (1 ph. On) (A)
Nominal Phase Current (2 ph. On) (A)
Angular Acceleration (nominal current)
Axial Shaft Play (µm)
Holding Torque Typical (mNm)
Holding Torque Typical (oz-in)
Holding Torque, 1.5x nominal current (mNm)
Holding Torque, 1.5x nominal current (oz-in)
Natural Resonance Frequency @nominal current (Hz)
Power rate (nominal current) (kW/s)
Radial Shaft Play (µm)
Max. Force* @ .001" (0.0254 mm) / Step (N)
Max. Force* @ .001" (0.0254 mm) / Step (oz)
Max. Force* @ .002" (0.0508 mm) / Step (N)
Max. Force* @ .002" (0.0508 mm) / Step (oz)
Max. Force* @ .004"(0.1016 mm) / Step (N)
Max. Force* @ .004"(0.1016 mm) / Step (oz)
Stroke Length, Typ{%|%}mm
Stroke Length, Typ{%|%}in
Min. Holding Force (Unenergized) @ .0005" (0.0127 mm) / Step{%|%}N
Min. Holding Force (Unenergized) @ .0005" (0.0127 mm) / Step{%|%}oz
Min. Holding Force @ 0.001" (0.0254 mm) / Step (Un-energised) (N)
Min. Holding Force @ 0.001" (0.0254 mm) / Step (Un-energised) (oz)
Min. Holding Force @ 0.002" (0.0508 mm) / Step (Un-energised) (N)
Min. Holding Force @ 0.002" (0.0508 mm) / Step (Un-energised) (oz)
Min. Holding Force (Unenergized) @ 0.003" (0.0762 mm) / Step (Un-energized){%|%}N
Min. Holding Force (Unenergized) @ 0.003" (0.0762 mm) / Step (Un-energized){%|%}oz
Min. Holding Force @ 0.004" (0.1016 mm) / Step (Un-energised) (N)
Min. Holding Force @ 0.004" (0.1016 mm) / Step (Un-energised) (oz)
Min. Holding Force @ rated current @ .0005" (0.0127 mm) / Step{%|%}N
Min. Holding Force @ rated current @ .0005" (0.0127 mm) / Step{%|%}oz
Min. Holding Force @ rated current @ .001" (0.0254 mm) / Step{%|%}N
Min. Holding Force @ rated current @ .001" (0.0254 mm) / Step{%|%}oz
Min. Holding Force @ rated current @ .002" (0.058 mm) / Step{%|%}N
Min. Holding Force @ rated current @ .002" (0.058 mm) / Step{%|%}oz
Min. Holding Force @ rated current @ .003" (0.0762 mm) / Step{%|%}N
Min. Holding Force @ rated current @ .003" (0.0762 mm) / Step{%|%}oz
Min. Holding Force @ rated current @ .004" (0.1016 mm) / Step{%|%}N
Min. Holding Force @ rated current @ .004" (0.1016 mm) / Step{%|%}oz
Output signal{%|%}MHz Two Channels square wave, Indexing channel (Optional)
Direction of rotation ( = / ≠)
Max. Recommended Input Speed (rpm)
Number of gear stages
Electrical phase shift{%|%}degree "± 45 up to 256 ppr ± 75 for 512 & 1024 ppr"
Duty cycle{%|%}% "± 15 up to 256 ppr ± 25 for 512 & 1024 ppr"
Maximum count frequency{%|%}kHz
Maximum speed @ 512 ppr{%|%}10{%SUP%}-7{%/SUP%} x kgm²
Maximum speed @ 1024 ppr{%|%}10{%SUP%}-7{%/SUP%} x kgm² 30,000
Operating Temperature Range: Rotor{%|%}°C
Operating Temperature Range: Motor{%|%}°C -40 to +100
Operating Temperature Range: Motor{%|%}°F -104 to +212
Operating Temperature Range: Rotor{%|%}°F
Code wheel moment of inertia{%|%}10{%SUP%}-7{%/SUP%} x kgm² Not available
Linear Travel Accuracy
Input Power (W)
Input Power (W)
Stepper Type
Document Technology Document Type Language File Type
M Sense B Specifications Sheet Encoder Specification Page  
M Sense B Drawing Encoder DXF Drawing  
Portescap pairs accuracy and feedback positioning with its newest M Sense B Encoder (press release: ENG) Encoder Press Release  
M Sense B (brochure) Encoder Literature