SF
Vishay Sfernice
Document Number: 54004
Revision 13-Dec-01
www.vishay.com
10
Precision Rotative Transducers,
Conductive Plastic, Servo Mounting (ROT)
FEATURES
• Size 08 to 30
• Linearity ± 1% down to ± 0.015%
• Excellent 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
Functions linear, on request specific law
Theoretical electrical angle (TEA) TEA = actual electrical angle (AEA) – 2°
Independent linearity (over TEA) A≤±1% B ≤± 0.5% C ≤± 0.25% D ≤± 0.1%
on request NA down to E ≤± 0.05% down to F ≤± 0.025% down to ≤± 0.015%
Actual electrical angle (AEA) 340° ± 3° 350° ± 2°
Ohmic values (RT) 1kΩ- 2kΩ- 5kΩ- 10kΩ- on request other values
Ohmic value tolerances at 20°C ± 10%; on request ± 5%
Output smoothness ≤0.025% on request ≤0.01%
Maximum power rating at 70°C 0.25W 0.3W 0.4W 0.5W 0.75W 1W 1.2W 1.5W
Wiper current / load resistance recommended: a few µA - 1mA max. continuous / minimum 103x RT
Tap (current or voltage) { Position: ± 2°
on request with angular position to be specified
U = current { Width: ≤4° T = voltage Position: ± 2°
Repeatability ≤0.01 %
End voltage ≤0.4% for 470Ω≤RT≤1000Ω/ ≤0.2% for 1000Ω< RT≤2200Ω/ ≤0.1% RT> 2200Ω
Insulation resistance ≥1000MΩ, 500Vdc
Dielectric strength ≥750VRMS, 50Hz ≥1000VRMS, 50Hz
SIZE
MODEL 08
34 SF 09
78 SF 11
116 SF 13
156 SF 15
176 SF 18
134 SF 20
200 SF 30
300 SF
ELECTRICAL SPECIFICATIONS
Mechanical rotation 360° continuous; stops on request
Mounting/shaft guiding servo/ball bearings
Housing diallylphtalate; on request anodized aluminum
Termination turrets; on request flexible leads, cables...
Wiper precious metal multi-finger contact
Starting torque (N.cm) 1 cup 0.2 0.25
each additional cup 0.15
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 16 ± 2 20 ± 2 29 ± 2 49 ± 2 67 ± 3 79 ± 3 120 ± 10
each additional cup 5 ± 2 6 ± 2 7 ± 2 10 ± 2 16 ± 2 18 ± 3 21 ± 3 62 ± 10
Life (million of cycles) ≥50
Temperature range – 55°C, + 125°C
Climatic category 55 / 125 / 04
Maximum rotation speed (RPM) 600
Sine vibration on 3 axes 1.5mm or 20g from 10Hz to 2000Hz
Mechanical shocks on 3 axes 50g - 11ms - half sine
MECHANICAL SPECIFICATIONS
PERFORMANCE
A complete range of servo mounting rotational transducers
for applications requiring long life accuracy and speed.
øC øD
øA
1.6
BN
øG
F
E
H
X
X0.025
T
X0.025
SF
Vishay Sfernice
Document Number: 54004
Revision 13-Dec-01 www.vishay.com
11
SERIES
ROT
MODEL
156
MOUNTING
TYPE
S
S: Servo
LINEARITY
C
Code
A: ± 1%
B: ± 0.5%
C: ± 0.25%
D: ± 0.1%
E: ± 0.05%
F: ± 0.025%
OHMIC VALUE
502
First 2 digits are
significant numbers
3rd digit indicates
number of zeros
MODIFICATION
W...
Special
feature
code number
CONDUCTOR
F
F: Plastic
NUMBER
OF CUPS
1
6 max.
TAP
T
on request
T: voltage
U: current
position to
be specified
DIMENSIONS
A– 0
– 0.013
B max.
C max.
D
E
F min.
ø G max.
H min.
I max.
J max.
K max.
L±2°
M max.
N max.
ø shaft stainless steel
shaft length
ø body plastic molded
ø flange
tolerance on flange
shoulder
width of groove
diameter of groove
turret location
radius on turrets
radius on screw clamp
ø on clamp
angle between turrets
total angle
1 cup
2 cups
3 cups
4 cups
5 cups
6 cups
3.175
13
19.18
15.875
1.6
1.5
17.57
5.8
14
13.5
19.6
30°
100°
16
23
36
42
54.5
60.5
3.175
16.6
22.3
19.05
1.6
1.5
19.8
5.95
15.4
15.4
23.8
30°
100°
20.5
27
40
50
63
74
3.175
16.6
27.07
24.608
1.6
1.5
24.8
6.3
17.3
17.3
27.7
25°
100°
20.5
23
36
42
54
60.5
3.175
16.6
33.35
30.160
1.6
1.5
30.9
6.3
20.5
18.9
33.6
20°
100°
20.5
25.5
39.5
47
60.5
68.5
6.345
16.6
36.4
33.337
1.6
2.2
33.3
7
23.1
23.1
37.4
20°
80°
23.5
26.13
39.5
49.5
62.5
73.5
6.345
16.6
44.5
39.674
1.6
1.8
41.4
10.15
26.5
26.5
44.5
25°
80°
23.5
26
39.5
49.5
62.5
73.5
6.345
16.6
50.9
47.625
2.4
2.2
47.6
10.2
29.7
29.7
50.8
15°
80°
23.5
28.5
40.97
50.72
64.5
74.5
6.345
16.6
76.3
73.025
2.4
1.75
73.1
10.2
43.7
42.6
77.5
15°
80°
23
34.5
–
–
–
–
DESIGNATION POTENTIOMETER REFERENCE
SIZE 08
34 SF 09
78 SF 11
116 SF 13
156 SF 15
176 SF 18
134 SF 20
200 SF 30
300 SF
MODEL
+ 0 – 25µm
+ 0 – 13µm
DIMENSIONS in millimeters, general tolerance ± 0.5mm
Precision Rotative Transducers,
Conductive Plastic, Servo Mounting (ROT)
Special characteristics designs on request
321
Clock wise
Viewed from shaft side
ORDERING INFORMATION
L
J
I
K on clamp
L
M
3
1
2
ELECTRICAL
CONNECTIONS
