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ABB i-bus® KNX
Multifunction Room Automation –
Room Master

Room Master Room Master
Basic Premium Room Master Room Master
RM/S 1.1 RM/S 2.1 RM/S 3.1 RM/S 4.1
General
Supply voltage KNX KNX KNX KNX
Type of installation DIN-Rail DIN-Rail DIN-Rail DIN-Rail
Module width (18 mm) 8 12 12 8
Current consumption, bus < 12 mA < 24 mA < 12 mA < 12 mA
Inputs
Binary inputs (for potential free contacts via contact scanning) 8 18 12 8
Outputs
Switching capacity 20 A (16 AX) 1) 1 3 4 –
Switching capacity 16 A (10 AX) 2) 2 1 – –
3 (configurable 12 (3 configurable
Switching capacity 6 A 3) as switch or as switch or – 8
fan outputs) fan outputs)
0.5 A electronic (for max. 2 electrothermal or motor valve drive 2 2 – –
controls)
4 (configurable
6 A changeover contact (Blind or Shutter control) – 1 also as –
switch outputs)
Functions
Lighting control
(Switching)    
Heating/Cooling
(Electrothermal or motor valve drive control, 3-level fan speed    
control)
Shading control
(Shutter, blinds or curtains) –  – –
Control of further loads via switched electrical sockets    
Internal connection of inputs and outputs without group adresses    
Scenes    
Room scenarios    
Application with preconfigured inputs and outputs   – –
Programmable with predefined and tested example projects (ETS 4) – –  – 14
for different fields of application (office, schools, hotel rooms, ...)
Planning templates – –  –

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 = Function is supported
– = Function is not supported
1) = Switching capacity, see Switch Actuators SA/S x.16.5.1
2) = Switching capacity, see Switch Actuators SA/S x.10.2.1
3) = Switching capacity, see Switch Actuators SA/S x.6.1.1