Helvar Thyristor Dimmer (455)

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The DIGIDIM 455 Thyristor Dimmer (leading edge) is a 500 Watt, DALI-compatible Lamp Interface Unit for use in a DIGIDIM lighting control system.

The dimmer is a DIN-rail mounted unit that can control a maximum load of 500 W. It can be connected to mains voltage lamps directly, or to low voltage lamps via a wirewound transformer. The dimmer is provided with a status LED and a physical selection switch.

The LED provides status and fault indications, the physical selection switch is used to identify the device during system configuration.

Note: This unit does not contain a DALI power supply and therefore one must be incorporated elsewhere in the system.

Out-of-box operation. No programming required when using DIGIDIM slider, rotary or push button panels.
Input voltage and frequency fluctuation compensation ensures stable output levels with fluctuating incoming mains levels.
Over current and over temperature protection.
DIN-rail mounted and only 35 mm wide.