PR142s66 in DIN rail enclosure, front three-quarter view, with heat sink and eight screw terminals

Pulse-contact LED dimmer with display, single button, low-side switched

Article number PR142s66

The PR142s66 dims lighting with a single external pulse contact, through a low-side switched PWM output of up to 3.5 A. A short press switches the lighting on or off, holding the button dims, and a double click takes the output straight to maximum. The limits, dimming speed and dimming curve are set on the display, as is the behaviour at switch-on and after a power interruption. After an adjustable time of 1 to 100 hours the dimmer switches off automatically, so lighting does not stay on unnecessarily.

Supply 24 V DC ±10 %
Input one pulse contact (normally open) between terminals 2 and 3
Output PWM, low-side switched: lighting between terminals 1 and 6

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Specifications

Specifications
Supply	24 V DC ±10 %
Input	One pulse contact (normally open) between terminals 2 and 3
Output	PWM, low-side switched: lighting between terminals 1 and 6
Setup	Display with UP, OK and DOWN buttons
Output current	3.5 A max.
PWM frequency	100 Hz as delivered, adjustable
Ambient temperature	-25 to 55 °C, non-condensing
Dimensions	45 x 83 mm with DIN rail enclosure, 42.6 x 72 mm without
Factory setting	Output lower limit 0 %, upper limit 100 %

Connections

Connections
Terminal	Function
Terminal 1	Supply plus (24 V DC) and lighting plus
Terminal 2	Supply minus, also switch connection; connect externally to terminal 7
Terminal 3	Push-button input, normally open (NO)
Terminal 4	Not used
Terminal 5	Not used
Terminal 6	PWM output, to the lighting minus
Terminal 7	Supply minus; link to terminal 2 with a short wire
Terminal 8	Not used

Datasheet (PDF)PDF, 154 kB

Setup

Connect the lighting between terminal 1 and terminal 6, and the switch between terminal 2 and terminal 3.
Link terminal 2 to terminal 7 with a short wire rated for the maximum output current.
Apply 24 V DC to terminal 1 (plus) and terminal 2 (minus).
Set the lower and upper limit of the output with Dimming MIN and Dimming MAX.
Set the dimming speed with Dimming Speed: 1 is the slowest, 100 the fastest.
Use Startup mode to choose how the dimmer switches on with the button: 0 = always at 100 %, 1 = at the last dimming level.
Use Powerup Mode to choose what the dimmer does after a power interruption: 0 = stay off, 1 = switch on.
If required, use Auto off hours to set a time of 1 to 100 hours after which the dimmer switches off automatically; 0 disables this function.
Other menu items: Dimming curve (1 for incandescent lamps, around 100 for most LED lamps; only change it if dimming is not smooth), Softstart (0 = off, 1 or 2 = gradual on and off over 1 or 2 seconds) and PWM Freq. (100 Hz as standard; only change it if strictly necessary).
Go to the SAVE menu to store the new settings.