Series 389MPLC Motorized Potentiometer
Cermet—1/2" square
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| Description |
| The series 389MPLC Motorized Potentiometer combines a geared motor with up to four potentiometer modules. The motor is coupled by a slip clutch to limit mechanical rotation and to allow manual adjustment. |
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Small Size
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Remote Operation
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Slip Clutch for Manual Operation
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1/2" square Potentiometer
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Gear Motor: 0.63" Diameter
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Conductive Plastic equivalents available, see Series 388MPLC
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Electrical Specifications
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Number of Sections
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Up to four modules
(Only two gang units are available from stock)
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Resistance Range
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Linear: 100 ohms to 5 Megohms
Tapered: 500 ohms to 2.0 Megohms
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Resistance Tolerance
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Linear: ±10% standard
±5% special
Tapered: ±10% standard
±5% under 20 ohms
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Independent Linearity
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±5% standard; specials available
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Dynamic Noise (C.R.V.)
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Linear: 1.5% of total R standard
(1.0% available as special)
Tapered: 6% of total R (500 ohms and above)
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Static Noise
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25dB up to 100 ohms
15dB up to 10 Kohms
10dB up to 100 Kohms
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Power Rating
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Bushing mounted: 1.0 watt at 85°C
PC mounted: 0.5 watt at 85°C
Derate to zero watts at 150°C
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Effective Rotation
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265° ±5°
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Mechanical Specifications
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| Mechanical Rotation |
295° ±5°
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| Stop Torque |
4 in-lb (0.45 Nm) maximum
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| Bushing |
1/4 in (6.35mm) x 1/4-32 NEF - Standard
3/8 in (9.53mm) x 3/8-32 NEF - Special
Various lengths available
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| Shaft |
Standard: 1/8 in (3.18mm) x 3/4 in (19.05mm) FMS Slotted
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| Motor and Gear Train Specifications |
| Gear Ratio |
120.4
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Torque
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2 Pot Sections: 0.3 to 3.5 oz.-in.
3 Pot Sections: 0.5 to 4.5 oz.-in.
4 Pot Sections: 0.5 to 5.5 oz.-in.
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Direction of Rotation
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ClockWise - Viewed from pot shaft end when motor (+) terminal connected to positive terminal of 12 volt supply
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No-Load Current
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28 ma (Gear Motor Only)
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Torque Constant
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0.072 oz.-in./ma (Gear Motor Only)
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Speed Constant
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4.0 RPM/ma (Gear Motor Only)
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Stall Current
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250 ma
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Voltage
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12 VDC
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Weight
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0.86 oz. (Gear Motor Only)
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Operating Temperature
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-30°C to 65°C
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Life
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500 hours
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