PR10-PR20

Rotating potentiometer transducers

The PR10, PR20 are potentiometric transducers that turn a rotative motion in a resistance variation: they are made of a precision rotating potentiometerthat, through a suitable transmission system, receives the motion from a drive shaft.
The potentiometers are available with 1, 3, 5, or 10 revolutions with transmission ratios between the drive shaft and the potentiometers. The reducer isprovided with a clutch for the protection of the potentiometer.
The use of these transducers makes necessary to know the number of revolutions that the drive shaft needs to develope the total stroke of the machi-ne: the number of revolutions is given by the transmission ratio of the reducer (gear ratios or reduction) for the potentiometers turns.
Versions: 
• PR20- has a hollow shaft with Ø20 mm bore
• PR10- has a Ø6 x 14mm shaft.
• PR20-I, -V have a built-in analogue interface with power supply 24Vdc: PR20-I with output 4-20mA; PR20-V with ouput 0-10 Vdc.

The combining with a display (V3P, V4P, P3X) makes of this device an economical, simple and effective system for the measuring of shiftings onmachines tool, automatic-, wood-marble-glassworking machinery, etc., with an accuracy not higher than ±0,1 mm.
Shock-proof, self-extinguishing case, solvent-,gasoline-,oil-, grease-proof.

                                 

PR10                                              PR20                                            PR20C
with shaft Ø6 x 14 mm         with signal led                               with connector

Photogallery

PR10


1. Fixing bores
2. Lock-pin

PR20



1. Lock-pin
2. Fixing screw 
3. Fixing bores

Weight 180 gr
Colour Grey RAL 7004
Electric connection PR10,PR20: cable length 2,5,10 meters
PR20C: 4 poles connector
Electromagnetic compatibility - EMC 2014/30/EU
Linearity ± 0,25%
Maximum rotation 340° ±4°
1080° ±10°
1800° ±10°
3600° ±10°
Maximum rotation speed with ratio 1/1 400 RPM, 1000 RPM for short periods
Nominal power 1 W
Potentiometers (rev.) 1, 3, 5, 10
PR10:output shaft Ø6 x 14 mm
PR20, PR20C: hollow shaft foro 20 H7
Protection degree IP54
Relative humidity 10 ± 90 %
Resistance 10 kOhm
Transmission ratios PR10 multiplying 1/2, 1/1,25 and reduction 1/1, 1.25/1, 1.33/1, 2.66/1
Transmission ratios PR20 and reduction 1/1,3.3/1,10/1,12/1,18/1,24/1,30/1,54/1,72/1,90/1
Working temperature -10 ± 70°C

The P_X positioning units serie are programmable microprocessor single-axis positioner with relay or analogue outputs that processes signals supplied by incremental transducers such as encoders, optical lines, and magnetic band.
The opportunity to create customized working programmes makes them extremely versatile (cutting machines, bending machines, etc.). In order to optimise the accuracy of positioning there are the possibility to enter some parameters that are able to counterbalance system inertia, clearances, and wear of mechanical couplings. Positioning is managed through the Start/Stop, Onward/Backward, Slow/Quick, End of Positioning relay outputs. A voltage analogue output is also available that may be set up as -10 +10V or 0+10V as well as the 4÷20mA current output for the control of inverters or actuators. All of the positioner inputs Start, Emergency, Preset, Piece-counter, and counting inputs are optoinsulated.
➤ Other features: automatic/semiautomatic, manual, absolute/line working mode, memorization of 99 positioning dimensions with the possibility of programming the number of pieces to be worked in sequence and the number of cycle repetitions; test function to check inputs and outputs; RS232 or RS485 MODBUS RTU serial connection.
• P1X: the 16-key keypad and 8 operation indicators make operating and setup of the positioners user-friendly.
• P2X: programming is done very easily by four keys on the front panel; an auxiliary display allows a two character-driven programming in addition to displaying parameters during processing.
• P3X: processes signals provided by potentiometric position transducers linear or rotary. The 16-key keyboard with 6 operation indicators make it simple and easy to use and the setup of the positioner.

The instruments of the V_P series are multifunction microprocessor display units with input from potentiometric transducer that are particularly indicated for the measurement of linear and angular dimensions.
The carrying out with microprocessor and the use of modern analogue-to-digital conversion techniques enable to obtain excellent performances in terms of calibration easiness, resolution, stability, conversion speed, and cost by enabling the implementation of some functions of interest for the industrial applications: absolute/relative dimension, tool diameter compensation, etc.. The instrument set-up and calibration operations are easily carried out with the four keys positioned on the front panel. Through self-learning calibration it is possible to adapt the input variable amplitude to the wished reading scale.
• V3P: the measured dimension may be compared with 3 intervention thresholds that may be set for the enabling of as many relays, the status of which is displayed through a led.
Versions: V3P- displayed, V3P-3 displayed with 3 intervention ON/OFF.
• V4P: the measured value can be compared with 2 or 3 alarms settable for enabling many relays whose status is displayed by LEDs. Two analog outputs, a voltage 0-10V or -10 to +10 V, the other 4 ÷ 20mA 12-bit resolution, and its possible to configure the instrument and check its status via serial interface RS485 with MODBUS RTU protocol.
Versions: V4P- displayed; V4P-2 interventions with 2 relay changeover; V4P-3 with 3 interventions relay ON/OFF; V4P-T with analog output voltage and current; V4P-2T with 2 interventions and analog output voltage and current; V4P-RS485 with serial output RS485 protocol MODBUS; V4P-2RS485 with 2 interventions relay and RS485 serial output.


The P Interface turns the signal supplied by a potentiometric transducer into current 0-20 mA, 4-20 mA or voltage 0-10Vdc.
Its typical employment is the current or voltage transmission of signals supplied by a remote potentiometric transducer to remote supervision systems.
Special features of the P interface are its low cost and simple setting: activating two trimmers it’s possible to refer the entire output range to the stroke of the poten-tiometer effectivly employed.
The instrument is carried out in a 3-module case for assembling on DIN EN50022 guide.

VERSIONS

INTP0 Power supply 115Vac
INTP1 Power supply 230Vac
INTP2 Power supply 24Vac
INTP3 Power supply 115Vdc


TECHNICAL FEATURES

Input impedance 1 Mohm
Linearity endless
Max. load impedance for current output 600 Ohm
Min. load impedance for voltage output 1Kohm
Output resolution 12 Bit
Outputs 0÷10 Vdc; 4÷20mA; 0÷20mA
Potentiometer input 1÷50 Kohm
Power supply 115Vac, 230Vac, 24Vac, 24Vdc 3VA
Relative humidity 10 ÷ 90 %
Working temperature ÷50°C
Electromagnetic compatibility - EMC 2014/30/EU


DIMENSIONS

 

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PR10 PR20 IT  EN  DE 
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RATIO CALCULATION
To optimize the accuracy of PR20: choose a gear ratio and a potentiometer which combined give a No. of turns slightly higher than the No. of turns required to cover the stroke.
➤ Available potentiometers with 1 turn (340°), 3 turn (1080°), 5 turn (1800°), 10 turn (3600°), and with a range of ratios (as per scheme in catalogue) in reduction and in multiplier.
Example 1. The transducer has to make 230 complete revolutions to have the complete stroke of potentiometer: POT 10turn ratio 24/1 calculate 24 x 10 = 240turn (its always better have some turn more).
Example 2. We have a screw with a female thread of pitch 4 that has to make a shifting of 550mm (in this case we do not know the total revolution required, but the pitch and distance): 550 : 4 = 137,5 that are number of revolution necessary to make the shifting, so POT 5turn Ratio 30/1 calculate 30 x 5 = 150turn.
Example 3, to calculate degrees. We have to make an angular shifting of 105°: use POT 1 turn (340°), for angular shifting is always better use POT 1turn. Ratio 1/3 multiplier calculate 340 : 3 = 113,5° available.

PR20 - multiplying PR20 - reducing PR10 - mulitplying PR10 - reducing

1/3

1/1

1/2

1/1

1/2

3,3/1

1/1,25

1.25/1

10/1

1.33/1

12/1

2.66/1

18/1

24/1

30/1

54/1

72/1

90/1