Assortment / System Description

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Room thermostats RDF/RDU/RDG
The RD.. room thermostats are low-cost products for room automation. They
represent compact solutions in modern design.
The products offer everything to ensure a pleasant room climate in residential
buildings, hotels, office buildings, etc., and to save energy. Time programs, central
setpoint compensation and local setpoint limitations for heating/cooling ensure
optimum energy savings without loss of comfort.
The room thermostats extend the field of application of Synco and other BACS
when it comes to individual room control with fan coil units, chilled ceilings/heated
ceilings, radiators, or VAV systems.
Device Product no. Data Sheet
Semi flush-mount room thermostats, AC 230 V
For fan coil units: 2-pipe, 2-pipe with electric heater, 4-pipe
- With 1- to 3-speed fan control
- With 1- to 3-speed fan control and buttons for the following functions:
Switching, dimming, blinds, and scenes
RDF301
RDF301.50
N3171

Semi flush-mount room thermostats, AC 24 V
For VAV systems: 1-duct and 1-duct with electric heater
RDU341 N3172
Room thermostats for wall mounting, AC 230 V
For fan coil units and chilled ceilings/heated ceilings
RDG100KN N3191
Room thermostats for wall mounting, AC 24 V
For VAV systems: 1-duct and 1-duct with electric heater,
with radiator, with air heating coil/air cooling coil
RDG400KN N3192
HIT  HVAC Integrated Tool (see page 87)
To select and engineer plants with RDF/RDU/RDG
www.siemens.com/HIT
The RD.. room thermostats communicate via KNX in LTE and S-mode. They are
suited for use with Synco 700 controls and other KNX-compatible products.
Features in connection with Synco 700:
• Operation and monitoring of the room thermostats with the RMZ792 bus
operator unit and/or the web browser when using the OZW772 web server
• Maximum energy efficiency thanks to exchange of relevant energy data, such as
heat or cooling energy demand, with Synco 700 controllers
• Time programs and central setpoint compensation through RMB795B central
control unit
• Minimum engineering effort in LTE mode (plug & play). The only settings needed
are the room thermostats’ KNX address and addressing of the zone
The integration of RD.. room thermostats in third-party systems or use with KNX-
compatible products is made in S-mode. Addressing of groups is always effected
with the ETS. The workflow is the same as with standard KNX devices.
Introduction
Overview
Integration in
Synco 700
Integration in
third-party systems