Precision Rotary Potentiometer

Transcription

1 Precision Rotary Potentiometer

2 Precision Rotary Potentiometer with resistance, current or voltage output Construction Circuits and characteristic curves Today potentiometric Angular Position Transmitters attain a still more status with regard to the analogue measuring technique as far as high-quality measurement tasks are concerned due to the favourable value for money. They are mainly used for Power and braking control elements for railway vehicles as well as ship telegraphs Rudder and propeller systems for ships Control drives for systems in the field of energy management and chemical industry Lifting gears and slewing mechanisms of cranes and excavators Tail vanes for meteorological measurements As dancer potentiometers for textile and paper machinery As well as for measurements in the field of mechanical, apparatus and medical engineering Potentiometric transmitters have either a high-resolution element of conductive plastic or a high-resolution gold or constantan wire with various resistance and angle values bis They are available in various sizes as single-turn or multiple-turn potentiometers or in a multiple design. For adjustment of the measuring range almost all series can be provided with short-circuiting tracks, taps and function windings. Some models are available with incorporated Signal Converter providing current or voltage outputs in configuration of 2, 3 or 4 wires. To ensure reliability in very dirty atmospheres, oil-filled potentiometers are available. Moreover, to provide protection for all potentiometers from mechanical damage, dusty and damp industrial atmospheres a series of casings with a degree of protection IP 4 to IP 8 is available which can be equipped with gearing and limit switches bis

3 ersions and Circuit ariations series PW Resistance elements as ring winding with wire winding on an anodised anchor ring can be provided with any circuit, angle and resistance values wiper limited by stops 2. wiper rotatable over with reactive winding 3. wiper rotatable over without reactive winding (sawtooth shape) 4. any arrangement of short circuiting tracks 5. any arrangement of tappings special windings with characteristic curve of the linear or sin./cos. type 9. two electrically isolated windings on a winding former, angle 175 series PW 1 2 Resistance elements as straight winding with wire winding on a coated former of copper wire are used in potentiometers of the multiple-turn or linear type but also in single-turn potentiometers with active angles up to max wiper limited by stops 2. wiper rotatable over only for purposes of putting into operation 4. any arrangement of short circuiting tracks 5. any arrangement of tappings series PK 1 2 Resistance elements of conductive plastic, imprinted on glass-fiber reinforced support material. The max. active angle amounts to 355. Smaller angles, tappings and short circuiting tracks on request wiper limited by stops 2. wiper rotatable over 4. any arrangement of short circuiting tracks 5. any arrangement of tappings 9. two electrically isolated windings on a winding former, angle 175 series PK/PW -MU I A U B 4 wires galvanically isolated Angular Position Transducers, equipped with resistance elements of wire or plastic with integrated R/I or R/ Converter for a current or voltage signal output, optional with a configuration of 2, 3 or 4 wires. Also available with galvanic isolation between supply and output signal as far as version with 4 wires is concerned. U B 3 or 4 wires All types of transducers are provided with back trimmers matching the output signal within wide limits to the respective angular position. I A U B 2 wires I A

4 Electrical Specifications Max. active angle Stops at max. Resistance on angle limited by stops 2) Resistance tolerance 2) Linearity tolerance Resolution Capacity Multiple design Functional winding Oilfilling Limit swichtes also available with integrated slipping clutch PW 45 ±,3 up to,2 %,5 up to <,1 % twofold 1) 2) 1) PW 7 35 min. 5 ±,2 up to,15 %,3 up to <,1 % W version M... only PW 13 ±,3 up to,2 %,5 up to <,1 % 17 ppm constricted resistance and linearity tolerances possible PW 2 ±,3 up to,2 %,5 up to <,1 % PW 123 ±,3 up to,2 %,5 up to <,1 % Max. active angle Stops at max. Resistance on angle limited by stops Resistance tolerance Linearity tolerance Resolution Capacity Multiple design PW 9/ ,5 W threefold PW 13/2 PW ,5 W 17 ppm PW 55 1,5 W stackable PW45W3/W1 W3 18 W1 3 W3 18 W1 3,1 up to,1 % 2 W 3) 3) PW45W3 and PW45W1 are multi-turn potentiometers for 3 or 1 turns Max. active angle Stops at max. Resistance Resistance tolerance 4) Linearity tolerance Resolution Capacity Multiple design ± 2 ± 2 PK ± 2 %,5 W threefold PK ± 2 %,5 W threefold PK ± 1 % 2 ppm PK ± 1 % PK not limited by stops ± 1 % twofold 4) favourably priced version with ± 1-2 % available oltage output Load resistance Current output Load resistance Supply voltage Current consumption 4 wires galvanically isolated 2, 3 or 4 wires Linearity General data Testing voltage EMC test according to PW/PK13-MU PW/PK2-MU PW/PK123-MU 1 and 2 1 respec. 5 2 and 4 2 respec DC approx. 8 max. 1 /1K, typically:,5 /1K 3 up to +7 C 55, 5 Hz, 1 min. DIN Generic Emission Standard DIN Generic Immunity Standard zero point and steepness to be matched via trimmer % %

5 Models PW7 PW45 12 h 7,2 12 h 32 M ,5 5 PK/PW13/2 33,32 -,2 47, -,2 PK/PW9/11 3,5 5,8 PW45 PW55 5,95-,2 M12x,75 2, ,2 +, , ,5 7 M4 19,3-,2, -, , PW7M... PW45W1 3h M1x1 8 L 5 2 2, ,5 M4 L MI MII MIII MI M MI

6 Models PW/PK13-MU/2-MU 33,32 47,-,2 -,2 PW/PK f 7 3,5 5,8 45, TK- 42 / M4 Model with Signal Converter mechanical characteristics of FSG models Casing material Shaft bearing Shaft material Connection IP code of casing Torque (single version only) Torque (oilfilling) Weight for single version only Fastening PW 45 PW 45 PW 7 thermoplastic PW45 thermoplastic PW7 thermoset sintered bearing ball - or sintered bearing stainless steel solder-type terminals solder-type terminals or screw connection PW 45m,5 Ncm PW 45h 5 Ncm 7 g central thread PW45,3 or 3 Ncm PW7,5 Ncm 1 Ncm PW45 7 g PW 7 14 g threaded hole IP 3 PW 55 thermoplastic plastic friction bearing plug Faston,2 Ncm 5 g through hole PW45W3 PW45W1 brass coated thermoplastic sintered bearing stainless steel solder-type terminals,5 Ncm PW45W3 1 g PW45W1 15 g central thread... mechanical characteristics of servo mount models Casing material Shaft bearing Shaft material Connection IP code of casing Torque Torque (oilfilling) Weight for single version only Weight with transducer Fastening PW/PK 9,3 Ncm 15 g PW/PK 11 PW/PK 13 Alu, black anodised ball or sintered bearing stainless steel Faston- or stranded wires IP 3,4 Ncm,5 Ncm 1, Ncm 2 g 4 g 5 g clamp or central thread or threaded holes PW/PK 2,5 Ncm 1, Ncm 7 g 12 g PW/PK 123 Alu, cover coated ball bearing plug or cable IP 5 2,5 Ncm 37 g 4 g clamp or threaded hole General data Resistance to vibration Shock resistance Lifetime 5-2 Hz, 1 g 5 g, ms high life by using a patented helical wiper 1-1 Mio.