Model 7280
7/8” Diameter
10 Turn Wirewound
Precision Potentiometer
MODEL STYLES AVAILABLE
7281
7283
7284
7286
7288 (for heavy side load applications)
1/8” Shaft, 1/4” Bushing
1/8” Shaft, Servo
6 mm shaft, 3/8” Bushing
1/4” Shaft, 3/8” Bushing
1/4” Shaft, 3/8” Bushing
ELECTRICAL
1
Resistance Range
Standard Resistance Tolerance
Minimum Practical Resistance Tolerance
Independent Linearity
2
Minimum Practical Independent Linearity
Power Rating
Dielectric Strength
Insulation Resistance
Noise
Actual Electrical Travel
End Voltage
Tap Tolerance
100 to 100K ohms
±5%
±1%
±0.25%
±0.15% (<300 ohms), ±0.075% (≥300 ohms)
2.0 Watts at 70°C, derating to 0 at 125°C
1,000 V rms
1,000 Megohms minimum
100 ohms maximum
3600° +10° -0° (>100 ohms), 3600° +10° -5° (≤100 ohms)
maximum 0.25% of input voltage
±3°
MECHANICAL
Total Mechanical Travel
Number of Gangs
Weight (single gang)
Backlash
7281, 7284, 7286, 7288
Static Stop Strength
Panel Nut Tightening Torque
Shaft End Play
Shaft Runout
Pilot Diameter Runout
Lateral Runout
Shaft Radial Play
Start/Run Torque (per gang, ES option adds 0.5 oz.-in.)
maximum
maximum
maximum
maximum T.I.R.
maximum T.I.R.
maximum T.I.R.
maximum
maximum
48 oz.-in.
25 lb.-in.
0.010”
0.003”
0.004”
0.005”
0.003”
0.8 oz.-in.
3600° +15° -0°
2 maximum
0.75 oz. nominal
1° maximum
7283
36 oz.-in.
n/a
0.005”
0.002”
0.002”
0.004”
0.002”
0.6 oz.-in.
1
2
Specifications subject to change without notice.
Linearity is measured between 1% and 99% of input voltage.
RoHS 2
Pb
compliant
BI Technologies Corporation
4200 Bonita Place, Fullerton, CA 92835 USA
Phone: 714 447 2345
September 1, 2015
Website: www.bitechnologies.com
Model 7280 page 1 of 4
Model 7280
Temperature Cycling
Shock
Vibration
Moisture Resistance
ENVIRONMENTAL (MIL-PRF-12934)
Operating Temperature Range
-40°C to +125°C dynamic, -55°C to +125°C static
5 cycles, -55°C to +125°C, maximum 5% ΔR
6 ms Saw-tooth, 100 G’s, 0.1 ms maximum discontinuity
15 G’s, 10 to 2,000 Hz, maximum 5% ΔR, 0.1 ms maximum discontinuity
Five 24 hour cycles, maximum 3% ΔR
1,000 hours at 125°C, maximum 5% ΔR
1M shaft revolutions + 900 hours at 2.0 Watts & 70°C, maximum 5% ΔR
IP50, IP66 available as option (feature code ES)
High Temperature Exposure
Rotational Load Life (1 lb side load for 7288)
Ingress Protection Rating (IP Code)
ORDERING INFORMATION
7286 R 10K T2 L.25 xx
Model Series
Resistance Prefix
Resistance Value
Linearity
Optional Non-standard Tolerance
Optional Feature Code (see table)
No code required for
slotted shaft 7284/7286/7288
or for plain shaft 7281/7283
FEATURE CODES
7281, 7283 plain shaft
7284, 7286, 7288 slotted shaft
Center Tap
Linearity Tape
Flatted Shaft
Slotted Shaft (standard on single cup 7284, 7286 &
7288 without RS feature)
Rear Shaft Extension (7281, 7286, 7288 single cup
only)
Shaft Lock (7286 & 7288 only)
High Torque 2-6 oz.-in. (7286 & 7288 only)
Additional Gang
Gold Plated Solder Lug Terminals (see optional
terminal configuration)
Seal (IP66) 7284, 7286, or 7288 only
no
code
CT
LT
FS
SS
RS
SL
HT
2G
FT
ES
STANDARD RESISTANCE VALUES
Total Resistance
(Ohms)
100
200
500
1K
2K
5K
10K
20K
50K
100K
Theoretical
Resolution
(% nominal)
0.059
0.037
0.030
0.024
0.020
0.018
0.017
0.016
0.010
0.008
Tempco of wire
(ppm/°C)
±20
±20
±20
±20
±20
±20
±20
±20
±20
±20
When multiple Feature Codes are used the P/N shall be in the
same sequence as listed in this table (top to bottom).
CIRCUIT DIAGRAM
(S)
(CCW)
(CW)
BI Technologies Corporation
4200 Bonita Place, Fullerton, CA 92835 USA
Phone: 714 447 2345
September 1, 2015
Website: www.bitechnologies.com
Model 7280 page 2 of 4
Model 7280
MATCHING TURNS COUNTING DIALS
7281: RBJ, 2601, 2641
7286, 7288: RB, 2126, 2606, 2606S, 2607, 2607S, 2626, 2627, 2646, 2646S, 2647, 2647S
OUTLINE DRAWINGS
Models 7281, 7284, 7286, & 7288
Bushing Mount with Sleeve Bearing
Dim.
A
.688
±
.031
17.475
± 0.787
7281
.812
±
.031
20.625
± 0.787
7284
.812
±
.031
20.625
± 0.787
7286 & 7288
B
1.125±.031
28.58±0.79
.750±.016
19.1±0.41
Slider
CCW
CW
Mounting
Surface
Dim.
A
.125
Min.
3.18
C
D
Dim.
B
+0.0000
3.1699 -0.0076
.281
7.137
+0.000
-0.002
+0.0000
.1248
-0.0003
Dia.
+0.0000
6.0000
-0.0127
.406
+0.000
-0.002
+0.0000
.2362
-0.0005
Dia.
+0.0000
6.3500
-0.0127
.406
+0.000
-0.002
+0.0000
.2500
-0.0005
Dia.
1/4
- 32
UNEF Thread
+0.000
-0.051
Dia.
3/8 - 32
UNEF Thread
75°
Max.
+0.000
10.312
-0.051
Dia.
3/8 - 32
UNEF Thread
.625
15.9
R Max.
+0.000
10.312
-0.051
Dia.
Dim.
C
.080±.001
Dia.
2.03±0.03
.062
+.000
-.010
+0.00
1.58
-0.25
.312±.016
7.93±0.41
Dim. D
Chamfer
.016/0.41
Max. x
45°
.875±.016
22.2±0.41
Dia.
Slot:
.032±.005/0.813±0.127
Wide X
.032+.010-.000/0.813+0.254-0.000
Deep
(Not on
Rear
Shaft
Models)
Optional Terminal Configuration
40°
.625
R
MAX
15.9
R
MAX
SLIDER
.020
Thickness
.110
2.794
.060
±
.003
1.524
±
.076
Dia.
VIEW B
.062
±
.003
1.524
±
.076
Enlarged View B
Use Special Feature Code “FT” to order.
BI Technologies Corporation
4200 Bonita Place, Fullerton, CA 92835 USA
Phone: 714 447 2345
September 1, 2015
Website: www.bitechnologies.com
Model 7280 page 3 of 4
Model 7280
OUTLINE DRAWINGS (continued)
Model 7283
Servo Mount with Ball Bearing
1.250±.031
31.75±0.79
Mounting
Surface
.375±.031
9.53±0.79
.781
19.8
Dia.
Max.
.1248
Clamp
Ears
.875±.016
22.2±0.41
Slider
.250
6.35
CCW
Min.
CW
+.0000
-.0003
+0.0000
Dia.
3.1699
-0.0076
.625
R.
Max.
15.9
105°
Max.
.875±.016
22.2±0.41
Housing
Dia.
.080±.001
2.03±0.03
Dia.
+.000
.625
-.001
+0.000
Dia.
15.875
-0.025
.057
1.45 Min.
.062±.005
1.58±0.13
Chamfer
.016/0.406 Max. x
45°
+.005
.875
-.010
Dia.
+0.13
22.2
-0.25
Clamp
.922
Dia.
Max.
23.4
.062±.005
1.58±0.13
Optional Terminal Configuration
40°
SLIDER
.625
R
MAX
15.9
R
MAX
105°
MAX
.110
2.794
.060
±
.003
1.524
±
.076
Dia.
VIEW B
.020
Thickness
.062
±
.003
1.524
±
.076
Use Special Feature Code “FT” to order.
Enlarged View B
BI Technologies Corporation
4200 Bonita Place, Fullerton, CA 92835 USA
Phone: 714 447 2345
September 1, 2015
Website: www.bitechnologies.com
Model 7280 page 4 of 4
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