Dimmax 420SLR Instructions

Prerequisites : Please read completely this manual before installation and start-up. This manual has to
been given to the user .
The installation of this item must be done by a competent person following the
rules of art and in respect of all existing norms.
Description: Dimmax 420SLR is a 420W static & silent electronic light dimmer for resistive (0 to 420W),
capacitive (0 to 200VA) and inductive (0 to 380VA) lighting systems. It has an optimized mode to handle
Leds (up to 200W). It has been designed to be installed on DIN rails, inside an electrical cabinet.
It is operated with :
Nominal conditions : 230V AC +/- 15%, 50 Hz, T ambiant : -10°C to 40°C

Foreword :

Today's new lighting systems include a lot of embedded electronics in Led lamps, e-
transformers for 12V halogens or e-converters for Leds. Dimmax 420SLR is designed to offer maximum
flexibility for all. Inductive loads are automatically recognized and in "leading edge" (mode 2) operated.
For the others, the user can select between 4 classical or proprietary optimized dimming modes, to allow
permanent compatibility with the constantly improved lighting systems. For resistive and capacitive
loads, the user can try at NO RISK all of them, the unit will always stay protected :
- if selected mode generates too much losses, unit enters auto-resettable overtemperature protection
- if selected mode generates too high current pulses, unit enters auto-resettable overcurrent protection
- final best choice is the one without protection's stops (user will in most cases be fixed after 10 minutes test at
70% dimming rate) and giving the smoother and broader dimming effect.
Dimmax 420SLR is designed for lighting systems. Other loads (like motors) are forbiten.
Among lighting systems you may have :
Resistive (R): 230V classical bulbs or halogens. These are ALWAYS DIMMABLE
–
–
Inductive (L): 230V ferromagnetic transformers for 12V halogens. These are ALWAYS DIMMABLE. Always select a
good quality transformer with safety fuses on BOTH primary and secundary sides.Halogen load must be at
least 80% of the nominal power of the transformer. NEVER let the secundary winding without a connected load.
Capacitive(C): 230V electronic modules (like e-transformers for 12V halogens, or e-converters included in a Led
–
lighting system). These are not always dimmable, CHECK FIRST, ONLY DIMMABLE ones are ALLOWED
Capacitive(C): 230V Leds. These are not always dimmable, CHECK FIRST, ONLY DIMMABLE ones are ALLOWED
–
We strongly recommend to read the "Important note about maximum Led power" on next page
ALL Leds or electronic modules connected to the same DimMax MUST be exactly of same type, model and power. It is advisable
not to exceed a total power of 200VA, and a total number of devices of 30.
Also, some lighting systems will only start at dim levels much higher than 0%. Therefore, after best operation mode selection, user
can adapt minimum start level by rotating the minimum start level control.
Default ex-factory settings : mode = 1 (trailing) and minimum start level = 3% (both controls fully counterclockwise as on the photo).

Wiring :

Proceed to wiring according to diagram (230V main's fuses removed).
Note following : - the 2 "L" Line contacts are internally paralleled
- the 2 "N" Neutral contacts are internally paralleled,
connection to Neutral is MANDATORY
- several pushbuttons can be paralleled
- NEVER share a pushbutton with several dimmers
- NEVER use pushbuttons with light indicators
- max pushbutton distance 25 m
- max wire size per contact 2,5 mm²

Mode selector and red indicator display :

At reconnection of main's 230V fuses, Dimmax 420SLR will
wake up and show it by lighting its red indicator for 0.5
second.
From start position (fully counterclockwise) of mode selector,
turn it smoothly clockwise. The first 1/4 of its span will select
mode 1, second selects mode 2, and so on uo to mode 4.
Selected mode is shown by a visual code on the red indicator :
1 short red flash for mode 1, permanently repeated
Mode 1 = trailing edge dimming, output power 0 - 420W, to be used with :
230V classical bulb lamps and halogens (BEST mode to avoid overcurrent error at cold startup)
–
230V dimmable electronic converters designed for trailing edge
–
2 short red flashes for mode 2, permanently repeated
Mode 2 = leading edge dimming (also called "triac mode"), output power 0 - 420W, to be used with :
ferromagnetic transformers for 12V halogen lamps (Dimmax will detect them and override any other mode choice)
–
230V dimmable electronic converters designed for leading edge
–
Dimmax 420SLR – Instructions
- 1 red indicator to report status or errors
- 1 operation mode manual selector
- 1 minimum start level manual selector
- 1 (or more) external pushbuttons to start, stop and adjust dimming effect
230 V 50 Hz
N
Lighting
system
1
Red indicator
Red indicator
Red indicator
Mode selector
Mode selector
Min dim level
Min dim level
selector
selector
Connexion to
Connexion to
push button push button
L
Normally OFF
Push button
2
3
Mode selector