PR142 module in DIN rail enclosure, front three-quarter view

Potentiometer-controlled LED dimmer, low-side switched

Article number PR142x01

The PR142x01 converts the position of an external potentiometer from 500 Ω to 100 kΩ into a low-side switched PWM output: the lamp is connected between terminal 1 (supply plus) and terminal 2. The potentiometer is connected to terminals 3, 4 and 5. Terminal 6, the supply minus, also serves as the common ground for the analogue signals; the module is not galvanically isolated.

Supply 9 to 30 V DC, for 12 and 24 V DC systems
Input potentiometer from 500 Ω to 100 kΩ on terminals 3, 4 and 5
Output PWM, low-side switched: lamp between terminals 1 and 2

Price on request

Lead time on request. Not in stock? We will make it.

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Other version: PR804s01. The PR804s01 from the PR804 series also dims with a potentiometer, is likewise low-side switched and has the same terminal layout. On that module the lower limit, upper limit and dimming speed are set with trimmers on the board, and the dimming curve is adjustable as well. Its potentiometer can be 1 kΩ to 100 kΩ and its PWM frequency is 120 Hz. Do you want to set the lower limit, upper limit and dimming speed yourself, or adjust the dimming curve? Then choose the PR804. Otherwise the PR142 is sufficient.

Orders are placed by email with a purchase order. We supply businesses only.

Specifications

Specifications
Supply	9 to 30 V DC, for 12 and 24 V DC systems
Input	Potentiometer from 500 Ω to 100 kΩ on terminals 3, 4 and 5
Output	PWM, low-side switched: lamp between terminals 1 and 2
Isolation	Not isolated: terminal 6 (supply minus) is also the common ground for the analogue signals
Output current	5 A max.
PWM frequency	122 Hz
Ambient temperature	0 to 80 °C
Dimensions	45 x 82 mm

Connections

Connections
Terminal	Function
Terminal 1	Supply plus (12 or 24 V DC) and lamp plus
Terminal 2	PWM output, to the lamp minus
Terminal 3	Potentiometer plus
Terminal 4	Potentiometer signal (wiper)
Terminal 5	Potentiometer minus
Terminal 6	Supply minus, also common ground for the analogue signals

Datasheet (PDF)PDF, 146 kB

Application

Dimming LED and halogen lighting steplessly with a potentiometer, in 12 and 24 V DC systems

PR142 series: PWM dimmers for LED and halogen

The dimmers in the PR142 series convert a potentiometer or a pulse contact into a PWM output, low-side or high-side switched, for dimming LED and halogen lighting. They run on 9 to 30 V DC, so on 12 and 24 V DC systems, deliver up to 5 A at 122 Hz and are suitable for an ambient temperature of 0 to 80 °C. The modules measure 45 x 82 mm. If you need galvanic isolation between input, output or supply, please contact us.

More about the PR142 series