Precision Rotative Transducers,
Conductive Plastic, Bushing Mounting
Series ROT/BF
Vishay Sfernice
www.vishay.com For technical questions, contact: sfer@vishay.com Document Number: 54005
44 Revision: 22-Mar-07
A complete range of bushing mounting rotational motion
transducers.
FEATURES
•Size 08 to 30
•Linearity ± 1 % down to ± 0.05 %
•Good repeatability
•Long life
•Essentially infinite resolution
•Up to 6 electrical functions with the same shaft
•On request custom design to meet your specifications
•Following MIL-R-39023 and NFC 93-255 requirements
RoHS
COMPLIANT
SIZE 08 09 11 13 15 18 20 30
MODEL 34 BF 78 BF 116 BF 156 BF 176 BF 134 BF 200 BF 300 BF
ELECTRICAL SPECIFICATIONS
Functions Linear, on request specific law
Theoretical Electrical Angle (TEA) Actual electrical angle (AEA) - 2°
Independent Linearity (over TEA)
Best Linearity Available
A ≤ ± 1 % or B ≤ ± 0.5 % or C ≤ ± 0.25 %
C ≤ ± 0.25 % Down to D ≤ ± 0.1 % Down to E ≤ ± 0.05 %
Actual Electrical Angle (AEA) 340° ± 3° 350° ± 2°
Ohmic Values (RT)1 kΩ - 2 kΩ - 5 kΩ - 10 kΩ - on request other values
Ohmic Value Tolerances at 20 °C ± 10 %
Output Smoothness ≤ 0.05 % ≤ 0.025 %
Maximum Power Rating at 70 °C 0.25 W 0.3 W 0.4 W 0.5 W 0.75 W 1.0 W 1.2 W 1.5 W
Wiper Current Recommended: a few µA - 1 mA max. (continuous)
Tap (Current or Voltage)
On Request with Angular Position to be Specified
U = current { Position: ± 2° / T = voltage Position: ± 2°
{ Width: ≤ 4°
Load Resistance on Wiper (RL)min. 10
3 x RT
Repeatability ≤ 0.02 %
End Voltage ≤ 0.4 % for 470 Ω ≤ RT ≤ 1000 Ω / ≤ 0.2 % for 1000 Ω < RT ≤ 2200 Ω / ≤ 0.1 % for RT > 2200 Ω
Insulation Resistance ≥ 1000 MΩ, 500 VDC
Dielectric Strength ≥ 750 VRMS, 50 Hz ≥ 1000 VRMS, 50 Hz
MECHANICAL SPECIFICATIONS
Mechanical Rotation 360° continuous; stops on request
Mounting Type Bushing
Shaft Guiding Sleeve bearings; on request ball bearings
Shaft Stainless steel
Housing Plastic moulding; on request anodized aluminum
Termination Turrets; on request flexible leads, cables...
Wiper Precious metal multi-finger contact
Starting Torque (N.cm) ≤ 0.5 1 cup; ≤ 0.3 for each additional cup
Moment of Inertia (g. cm2) 0.3 0.4 0.6 0.8 2.2 2.8 3.5 10
Weight (g) 1 cup 11 ± 2 20 ± 2 21 ± 2 30 ± 2 33 ± 2 45 ± 3 54 ± 3 120 ± 10
each additional cup 5 ± 2 6 ± 2 7 ± 2 14 ± 2 16 ± 2 18 ± 3 21 ± 3 62 ± 10
PERFORMANCE
Life (Million of Cycles) ≥ 20
Temperature Range - 55 °C to + 125 °C
Climatic Category 55/125/04
Rotation Speed (RPM) 150