Model 7280 7/8” Diameter 10 Turn Wirewound Precision Potentiometer MODEL STYLES AVAILABLE 7281 1/8” Shaft, 1/4” Bushing 7283 1/8” Shaft, Servo 7284 6 mm shaft, 3/8” Bushing 7286 1/4” Shaft, 3/8” Bushing 7288 (for heavy side load applications) 1/4” Shaft, 3/8” Bushing ELECTRICAL1 Resistance Range 100 to 100K ohms Standard Resistance Tolerance ±5% Minimum Practical Resistance Tolerance ±1% Independent Linearity2 ±0.25% Minimum Practical Independent Linearity ±0.15% (<300 ohms), ±0.075% (≥300 ohms) Power Rating 2.0 Watts at 70°C, derating to 0 at 125°C Dielectric Strength 1,000 V rms Insulation Resistance 1,000 Megohms minimum Noise 100 ohms maximum Actual Electrical Travel 3600° +10° -0° (>100 ohms), 3600° +10° -5° (≤100 ohms) End Voltage maximum 0.25% of input voltage Tap Tolerance ±3° MECHANICAL Total Mechanical Travel 3600° +15° -0° Number of Gangs 2 maximum Weight (single gang) 0.75 oz. nominal Backlash 1° maximum 7281, 7284, 7286, 7288 1 2 7283 Static Stop Strength maximum 48 oz.-in. 36 oz.-in. Panel Nut Tightening Torque maximum 25 lb.-in. n/a Shaft End Play maximum 0.010” 0.005” Shaft Runout maximum T.I.R. 0.003” 0.002” Pilot Diameter Runout maximum T.I.R. 0.004” 0.002” Lateral Runout 0.004” maximum T.I.R. 0.005” Shaft Radial Play maximum 0.003” 0.002” Start/Run Torque (per gang, ES option adds 0.5 oz.-in.) maximum 0.8 oz.-in. 0.6 oz.-in. Specifications subject to change without notice. Linearity is measured between 1% and 99% of input voltage. 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 RoHS 2 Pb compliant Model 7280 ENVIRONMENTAL (MIL-PRF-12934) Operating Temperature Range -40°C to +125°C dynamic, -55°C to +125°C static Temperature Cycling 5 cycles, -55°C to +125°C, maximum 5% ΔR Shock 6 ms Saw-tooth, 100 G’s, 0.1 ms maximum discontinuity Vibration 15 G’s, 10 to 2,000 Hz, maximum 5% ΔR, 0.1 ms maximum discontinuity Moisture Resistance Five 24 hour cycles, maximum 3% ΔR High Temperature Exposure 1,000 hours at 125°C, maximum 5% ΔR Rotational Load Life (1 lb side load for 7288) 1M shaft revolutions + 900 hours at 2.0 Watts & 70°C, maximum 5% ΔR Ingress Protection Rating (IP Code) IP50, IP66 available as option (feature code ES) ORDERING INFORMATION 7286 R 10K T2 L.25 xx Model Series Linearity Resistance Prefix Resistance Value Optional Feature Code (see table) No code required for slotted shaft 7284/7286/7288 or for plain shaft 7281/7283 Optional Non-standard Tolerance FEATURE CODES STANDARD RESISTANCE VALUES 7281, 7283 plain shaft 7284, 7286, 7288 slotted shaft no code Center Tap CT Linearity Tape LT Flatted Shaft FS Slotted Shaft (standard on single cup 7284, 7286 & 7288 without RS feature) SS Rear Shaft Extension (7281, 7286, 7288 single cup only) RS Shaft Lock (7286 & 7288 only) SL High Torque 2-6 oz.-in. (7286 & 7288 only) HT Additional Gang 2G Gold Plated Solder Lug Terminals (see optional terminal configuration) FT Seal (IP66) 7284, 7286, or 7288 only ES When multiple Feature Codes are used the P/N shall be in the same sequence as listed in this table (top to bottom). Total Resistance (Ohms) Theoretical Resolution (% nominal) 100 0.059 ±20 200 0.037 ±20 500 0.030 ±20 1K 0.024 ±20 2K 0.020 ±20 5K 0.018 ±20 10K 0.017 ±20 20K 0.016 ±20 50K 0.010 ±20 100K 0.008 ±20 Tempco of wire (ppm/°C) CIRCUIT DIAGRAM (S) (CCW) 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 (CW) 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 Dim. Models 7281, 7284, 7286, & 7288 Bushing Mount with Sleeve Bearing 7281 .688 ± .031 17.475 ± 0.787 A +0.0000 .1248 -0.0003 B 1.125±.031 28.58±0.79 .750±.016 19.1±0.41 Slider CCW .281 C .125 Min. 3.18 7.137 D +0.000 -0.002 +0.000 -0.051 Dim. D Chamfer .016/0.41 Max. x 45° .312±.016 7.93±0.41 Dia. Dia. +0.0000 .2362 -0.0005 +0.0000 6.0000 -0.0127 .406 10.312 +0.000 -0.002 .020 Thickness 3/8 - 32 UNEF Thread 75° Max. +0.0000 6.3500 -0.0127 .406 10.312 +0.000 -0.002 +0.000 -0.051 .875±.016 22.2±0.41 Dia. .110 2.794 .060 ± .003 1.524 ± .076 .062 ± .003 1.524 ± .076 Use Special Feature Code “FT” to order. BI Technologies Corporation 4200 Bonita Place, Fullerton, CA 92835 USA Website: www.bitechnologies.com Model 7280 page 3 of 4 Dia. Dia. 3/8 - 32 UNEF Thread .625 15.9 R Max. Enlarged View B Phone: 714 447 2345 Dia. Dia. +0.000 -0.051 VIEW B .625 R MAX 15.9 R MAX September 1, 2015 +0.0000 .2500 -0.0005 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 SLIDER .812 ± .031 20.625 ± 0.787 Dim. C .062 +.000 -.010 1.58 +0.00 -0.25 40° 7286 & 7288 .812 ± .031 20.625 ± 0.787 1/4 - 32 UNEF Thread Dim. B CW .080±.001 Dia. 2.03±0.03 +0.0000 3.1699 -0.0076 Mounting Surface Dim. A 7284 Dia. Model 7280 OUTLINE DRAWINGS (continued) Model 7283 Servo Mount with Ball Bearing Mounting Surface 1.250±.031 31.75±0.79 .375±.031 9.53±0.79 .875±.016 22.2±0.41 .250 6.35 CCW Min. CW Slider .875±.016 22.2±0.41 Housing Dia. .781 19.8 Dia. Max. .080±.001 2.03±0.03 Dia. +.0000 -.0003 +0.0000 Dia. 3.1699 -0.0076 .1248 +.000 .625 -.001 +0.000 Dia. 15.875 -0.025 .057 1.45 Min. .062±.005 1.58±0.13 .062±.005 1.58±0.13 .625 R. Max. 15.9 105° Max. +.005 .875 -.010 Dia. +0.13 22.2 -0.25 Chamfer .016/0.406 Max. x 45° Clamp .922 Dia. Max. 23.4 Optional Terminal Configuration 40° 105° MAX SLIDER .625 R MAX 15.9 R MAX VIEW B .020 Thickness BI Technologies Corporation 4200 Bonita Place, Fullerton, CA 92835 USA Phone: 714 447 2345 September 1, 2015 .110 2.794 .060 ± .003 1.524 ± .076 .062 ± .003 1.524 ± .076 Use Special Feature Code “FT” to order. Website: www.bitechnologies.com Model 7280 page 4 of 4 Clamp Ears Enlarged View B Dia.