PR100 module in DIN rail holder, front three-quarter view

Potentiometer to 4-20 mA converter, push-button setup

Article number PR100s01

The PR100s01 converts the signal of a potentiometer or sensor from 500 Ω to 100 kΩ into a 4-20 mA or 0-20 mA current signal. The output is calibrated at the press of a button: potentiometer in the position for 20 mA, press the button; potentiometer in the position for 4 mA, press the button. Fine adjustment by hand remains possible afterwards. The output is not galvanically isolated: the output minus is internally connected to the supply minus.

Supply 12 and 24 V DC, operating range 11 to 30 V DC
Input potentiometer or sensor, 500 Ω to 100 kΩ
Output 0 to 22 mA, for 4-20 mA and 0-20 mA

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Other version: PR181-X089. The PR181-X089 also converts a potentiometer to 4-20 mA, with an output galvanically isolated from input and supply. It is set up on a display, and the rise and fall rate of the output is adjustable as well. Supply 9 to 30 V DC, ambient temperature -25 to 55 °C, non-condensing. Do input and output need to be isolated, or would you rather set it up on a display? Then choose the PR181. Otherwise the PR100 is sufficient.

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Specifications

Specifications
Supply	12 and 24 V DC, operating range 11 to 30 V DC
Input	Potentiometer or sensor, 500 Ω to 100 kΩ
Output	0 to 22 mA, for 4-20 mA and 0-20 mA
Isolation	Not isolated: the output minus (terminal 4) is internally connected to the supply minus (terminal 2)
Setup	Three push buttons and a green LED
Ambient temperature	0 to 55 °C
Dimensions	Board 43 x 72 mm
Mounting	DIN rail holder, supplied as standard

Connections

Connections
Terminal	Function
Terminal 1	Supply plus, 12 or 24 V DC
Terminal 2	Supply minus, also common ground for the analogue signals
Terminal 3	4-20 mA output plus
Terminal 4	4-20 mA output minus, internally connected to terminal 2
Terminal 5	Potentiometer or sensor plus
Terminal 6	Potentiometer or sensor signal (wiper)
Terminal 7	Potentiometer or sensor minus

Datasheet (PDF)PDF, 161 kB

Setup

Set up the module when it is first connected and every time you use a different potentiometer or sensor.
Connect the potentiometer or sensor to terminals 5, 6 and 7, and the output to terminals 3 and 4.
Apply 12 or 24 V DC to terminals 1 and 2. The green LED lights continuously.
Hold button 3 for four seconds. The LED flashes green: the module is in programming mode.
Set the potentiometer to the position where you want 20 mA, for example the maximum. Hold button 2 for four seconds. The LED flashes quickly for two seconds.
Set the potentiometer to the position where you want 4 mA, for example the minimum. Hold button 1 for four seconds. The LED flashes quickly for two seconds.
Hold button 3 again for four seconds to save. The LED flashes quickly for two seconds and then lights green continuously. The module is ready for use.
To restore the factory settings: disconnect the supply, hold button 2 and reconnect the supply. If the green LED flashes briefly and quickly, the module has been reset.

Application

Connecting a potentiometer or sensor to a 4-20 mA or 0-20 mA input

PR100 series: converters with push-button setup

The converters in the PR100 series are set up with three push buttons and a green LED on the module. Button 3 puts the module in programming mode, button 2 stores the value for the maximum and button 1 the value for the minimum; button 3 saves. The output can then still be fine-tuned by hand. All versions run on 12 and 24 V DC, operating range 11 to 30 V DC, at an ambient temperature of 0 to 55 °C; the board measures 43 x 72 mm and a DIN rail holder is supplied as standard. The output minus is internally connected to the supply minus: the PR100 is not galvanically isolated. To restore the factory settings, disconnect the supply, hold button 2 and reconnect the supply.

Do input and output need to be isolated, or would you rather set it up on a display? Then choose a module from the PR181 series: it is set up on a display, runs on 9 to 30 V DC and has a galvanically isolated output and an adjustable rise and fall rate. Where a PR181 exists for the same conversion, it is listed on the product page under Other version.

More about the PR100 series