Compatible Loads

The C-Bus Digital Dimmers are compatible with a wide range of dimmable low-voltage lighting, as long as they operate within the specified channel ratings and built-in protection mechanisms.

Load Type	Symbol	Required Mode	5508D1D Rating	5504D2D Rating	5504DHD Rating
Dimmable LED Lamps and luminaries	LED	TE	1 A 230 W (230 V) 110 W (110 V)	2 A 460 W (230 V) 220 W (110 V)	5 A* 1150 W (230 V) 550 W (110 V)
Incandescent/Halogen Lamps		TE	1 A 230 W (230 V) 110 W (110 V)	2 A 460 W (230 V) 220 W (110 V)	5 A* 1150 W (230 V) 550 W (110 V)
Dimmable Electronic Transformers with ELV Halogen Lamps, LED Lamps, or LED Strip**		TE	1 A 230 W (230 V) 110 W (110 V)	2 A 460 W (230 V) 220 W (110 V)	5 A* 1150 W (230 V) 550 W (110 V)
Dimmable Iron-Core Transformers with ELV Halogen or LED Lamps		LE	1 A 230 W (230 V) 110 W (110 V)	2 A 460 W (230 V) 220 W (110 V)	5 A* 1150 W (230 V) 550 W (110 V)
Dimmable LED Lamps and luminaries Dimmable Electronic Transformers with ELV Halogen Lamps, LED Lamps, or LED Strip (Special Cases***)	LED	LE***	43 W (230 V/PF=0.95) 20 W (230 V/PF=0.8) 22 W (110 V/PF=0.95) 10 W (110 V/PF=0.8)	86 W (230 V/PF=0.95) 40 W (230 V/PF=0.8) 43 W (110 V/PF=0.95) 20 W (110 V/PF=0.8)	43 W (230 V/PF=0.95) 20 W (230 V/PF=0.8) 43 W (110 V/PF=0.95) 20 W (110 V/PF=0.8)

*Total load across any 2 adjacent channels must be limited to 6 A / 1380 W (230 V) / 660 W (110 V). For more details, refer Flexible Loading.

** LED strip drivers are limited by inrush current. For more details, refer to the section Overcurrent Protection .

*** For more information, refer Using LE Mode with Electronic Loads.

IMPORTANT: It is recommended that motor loads such as exhaust fans or ceiling sweep fans be controlled by an appropriate C-Bus Relay rather than a dimmer channel.

NOTICE
RISK OF Equipment Damage If replacing an older C-Bus dimmer such as an L5508D1A, L5504D2A, L5504D2U, or L5104D5 with a new C-Bus Digital Dimmer, it is important to check that the loads already connected are compatible with the new dimmers, both in relation to channel rating and load type. In some cases, existing loads may not be suitable, or may need to be split across multiple channels or multiple dimmers. Never disable the Load Detection Mode before energising a new dimmer channel connected to an existing installation where the load type is unknown. Failure to follow these instructions can result in equipment damage.

NOTICE

RISK OF Equipment Damage

If replacing an older C-Bus dimmer such as an L5508D1A, L5504D2A, L5504D2U, or L5104D5 with a new C-Bus Digital Dimmer, it is important to check that the loads already connected are compatible with the new dimmers, both in relation to channel rating and load type. In some cases, existing loads may not be suitable, or may need to be split across multiple channels or multiple dimmers.
Never disable the Load Detection Mode before energising a new dimmer channel connected to an existing installation where the load type is unknown.

Failure to follow these instructions can result in equipment damage.

Using LE Mode with Electronic Loads

To utilise the full rating of the dimmer, Electronic/Capacitive load types such as LEDs must run in TE mode.

In some situations, such as where a ripple filter may be required upstream from the dimmer, it may be necessary to set the dimmer channels to LE mode, even when using a capacitive load such as an LED.

In such cases, the capacitive load creates a high inrush current at turn on every mains half-cycle, which significantly increases the power dissipation of the dimmer. In this configuration, the load rating is significantly reduced as per the table. The rating in this situation is also affected by the power factor of the load (which is an indication of the amount of capacitance it presents to the dimmer channel). Higher power factor is better, and load types with power factor lower than 0.8 should be avoided.