ABB KNX LED Dimming Actuator 4-fold 210W

The UD/S4.210.2.1 is part of ABB’s current UD/S universal LED dimming actuator range. It sits on the DIN rail in the distribution board, takes its logic power from the KNX bus via an integrated bus coupler, and dims 4 230 V AC lighting channels.

What it does

• 4 independent dimming channels, each rated up to 210 W/VA, with outputs that can also be paralleled for higher-wattage loads on fewer channels.
• Supports trailing-edge and leading-edge dimming for LED, halogen and incandescent lamps and inductive/electronic transformers, with automatic load-type detection (can be switched off).
• Manual operation on the front, every channel can be driven by hand during commissioning or a bus failure, with no ETS download needed.
• Separate neutral connection per channel and a minimum load of 2 W per channel.
• Genuine ABB, supplied by Infinitex in Dubai with trade pricing, ETS product data and UAE-wide delivery.

Where it fits

A 4-channel unit suits a mid-size apartment or several rooms sharing one distribution board. Because the KNX side is entirely software-defined, the same hardware covers LED, halogen and transformer-fed loads, you set the dimming curve and load type in ETS rather than choosing different hardware.

Technical summary

• Order code: UD/S4.210.2.1
• Channels: 4
• Load rating: up to 210 W/VA per channel (LED trailing-edge, halogen/incandescent, L/C-transformer); lower ratings apply for leading-edge LED loads
• Mounting: DIN rail (MDRC), distribution board
• Bus: KNX TP, integrated bus coupler, powered from the bus
• Manual operation: yes, per channel, without bus voltage
• Automatic load detection: yes (can be deactivated)
• Minimum load: 2 W per channel
• Brand: ABB

Need the ETS application or the full datasheet? Ask Infinitex, we support UAE integrators through design, submittals and commissioning.