Rako RDDSI 800W Fluorescent Ceiling mount dimmer

Rako RDDSI 800W Fluorescent Ceiling mount dimmer

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The RDDSI is a single-channel 800W dimming module. The RDDSI is designed for use with Tridonic DSI controllable fluorescent ballasts. The DSI ballasts can be controlled without the need to remove the live feed as is required for the 1-10V ballast type. The RDDSI can also be used with other Tridonic devices using the DSI protocol, such as their LV transformers. The unit is designed to be ceiling-mounted adjacent to the luminaries and will fit through a standard down light cut-out. Its compact design makes it easy to retrofit, making scene-set installations as simple as possible. Each unit stores, in non-volatile RAM memory, its user definable addresses: up to 256 house and 256 room addresses, accommodating the largest of schemes. The dimmer also stores its own channel addresses (up to 15 per room) and four user-programmable scene levels. Communication with other Rako devices such as the RCP keypads is via coded FM radio, eliminating the need for control wiring.

Rako RDDSI 800W Fluorescent Ceiling mount dimmer


Providing your item is in stock, the order is usually dispatched within 24 hours. Please remember that postage and packing is completely free for orders over £50*. Out of stock items will be dispatched as soon as they become available, out of stock items can take between 4 to 21 days for dispatch.

Deliveries usually take 1-3 working days. The majority of orders are sent via our couriers'; Interlink Express on a next-day-delivery service. Smaller, low value or light-weight items are normally posted using Royal Mail Recorded or Royal Mail Special Delivery.

Once your product has been dispatched, you will be notified via email and sent a unique consignment number, you can use this number at to check the status of your delivery. If you have provided a mobile telephone number, Interlink's Predict service will notify you by text (and email) of a one-hour delivery window. If the window they suggest is inconvenient, you can change the date of delivery to a later one via text or email.

*We ship free of charge to mainland UK addresses, excluding the Scottish Highlands or 'Out-Of-Reach' Scottish locations. Please consult the post-codes below to see if your location falls within this category. If you are still unsure, please contact us on 01432 354921. We also ship to Northern Ireland, Channel Islands, Scilly Isles, Scottish Isles and Scottish Highlands, however delivery to these locations will incur a charge and can only be sent via a 2-day service.

Shipping CostsMainland UK (Next-Day)Offshore/Out-of-reach (2-day)Northern Ireland, Channel Islands, Isle of Man, Scottish Islands, Scilly IslandsRepublic of Ireland (2-day)
Under £50 Orders £7.50 £12.50 £15.00
Over £50 Orders FREE £19.99 £29.99
Surcharge Orders £50.00 £69.99 £79.99
Saturday Delivery £12.99 N/A N/A
Sunday Delivery £12.99 N/A N/A


Post codes exempt from the free delivery service include:

Scottish Highlands Post Codes: AB30-38, AB41-42, AB44-56, FK17-99, G83, IV1-28, IV30-39, IV52-54, IV63, KW1-14, PA21-33, PA34-40, PH15-26, PH31-41, PH49-50
Islands Post Codes: HS1-9, IV40-51, IV55-56, KA27-28, KW15-17, PA20, PA41-49, PA60-78, PH42-44, ZE1-3
Northern Ireland: All BT postcodes
Channel Islands Post Codes: JE, GY
Scilly Isles Post Codes: TR21, TR22, TR23, TR24, TR25

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