PR804 module in DIN rail enclosure, front three-quarter view

Potentiometer-controlled LED dimmer, high-side switched, adjustable limits and dimming speed

Article number PR804s02

The PR804s02 converts the position of an external potentiometer from 1 kΩ to 100 kΩ into a high-side switched PWM output: the lamp is connected between terminal 2 and terminal 6. Terminal 6 (0 V) also serves as the common ground for the analogue signals; the module is not galvanically isolated. The MIN, MAX and SPEED trimmers on the board set the lower limit, upper limit and dimming speed of the output.

Supply 9 to 30 V DC, for 12 and 24 V DC systems
Input potentiometer from 1 kΩ to 100 kΩ on terminals 3, 4 and 5
Output PWM, high-side switched: lamp between terminals 2 and 6

Price on request

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

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Other version: PR142x02. The PR142x02 from the PR142 series also dims with a potentiometer, is likewise high-side switched and has the same terminal layout. Its potentiometer can be 500 Ω to 100 kΩ and its PWM frequency is 122 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 1 kΩ to 100 kΩ on terminals 3, 4 and 5
Output	PWM, high-side switched: lamp between terminals 2 and 6
Isolation	Not isolated: terminal 6 (0 V) is also the common ground for the analogue signals
Setup	MIN, MAX and SPEED trimmers on the board; dimming curve adjustable
Output current	5 A max.
PWM frequency	120 Hz
Ambient temperature	0 to 80 °C
Dimensions	45 x 83 mm with DIN rail enclosure, 42.5 x 72 mm without

Connections

Connections
Terminal	Function
Terminal 1	Supply plus
Terminal 2	PWM output, to the lamp plus
Terminal 3	Potentiometer plus
Terminal 4	Potentiometer signal (wiper)
Terminal 5	Potentiometer minus
Terminal 6	Supply minus (0 V) and lamp minus, also common ground for the analogue signals

Datasheet (PDF)PDF, 155 kB

Setup

Connect the lamp between terminal 2 and terminal 6.
Connect the potentiometer to terminals 3 (plus), 4 (wiper) and 5 (minus).
Connect the supply to terminal 1 (plus) and terminal 6 (0 V).
Set the lower limit of the output with the MIN trimmer.
Set the upper limit of the output with the MAX trimmer.
Set the dimming speed with the SPEED trimmer.

Application

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

PR804 series: dimmers with adjustable limits and dimming speed

The dimmers in the PR804 series convert a potentiometer, a 4-20 mA or 0-10 V signal or a pulse contact into a PWM output for LED and halogen lighting. Lower limit, upper limit and output speed are set with the potentiometers on the module. The dimming curve is adjustable too, so that LED lighting responds linearly to the control. Low-side switched, the lamp is connected between terminal 1 and terminal 2; high-side switched, between terminal 2 and terminal 6. All versions run on 9 to 30 V DC, deliver up to 5 A at 120 Hz and are suitable for an ambient temperature of 0 to 80 °C. The DIN rail enclosure measures 45 x 83 mm (board 42.5 x 72 mm). If you need galvanic isolation between input, output or supply, please contact us.

More about the PR804 series