The ABB RM/S2.1 is a compact Room Master MDRC for hotels, hospitals, student residences, and similar room-centric buildings. It combines lighting, load switching, and related room functions in one DIN-rail device and can operate standalone or as part of an ABB i-bus® KNX network.

Depending on the variant, Room Masters ship with preconfigured application logic for fast site commissioning, with optional ETS extensions for full KNX integration.

Key Features

• All-in-one room device: Lighting and load control for typical guest/patient rooms.
• MDRC form factor: DIN-rail installation with KNX TP communication.
• Fast commissioning: Preconfigured/example projects depending on type (Basic / Premium / programmable).
• Scalable: Extend with additional KNX devices for dimming, HVAC, and shading.

At a Glance

Specification	Detail
Product type	KNX Room Master (MDRC)
Order code	RM/S2.1 (2CDG110095R0011)
Mounting	DIN rail
Bus system	KNX twisted pair (TP)
ABB product page	RM/S2.1

Pair Room Masters with line infrastructure such as SV/S 30.320.1.1 and secure routing via IPR/S3.5.1.