Siemens RDG400KN Manual page 2

Use
Functions
2 / 14
Siemens
Building Technologies
The RDG400KN room thermostat is designed for the following types of system:
VAV systems via ON/OFF or modulating control outputs:
 Single-duct system
 Single-duct system with electric heater
 Single-duct system and radiator / floor heating
 Single-duct system with heating / cooling coil
The room thermostat is delivered with a fixed set of applications.
The relevant application is selected and activated during commissioning using one
of the following tools:
 Synco ACS
 ETS3 Professional (planned)
 Local DIP switch and HMI
 Room temperature control via built-in temperature sensor or external room
temperature / return air temperature sensor
 Changeover between heating and cooling mode (automatic via local sensor or
bus, or manual)
 Selection of applications via DIP switches or commissioning tool (ACS700,
ETS3 Professional)
 Select operating mode via operating mode button on the thermostat
 Temporary Comfort mode extension
 Display of current room temperature or setpoint in °C and/or °F
 Minimum and maximum limitation of room temperature setpoint
 Minimum and maximum limitation of air flow signal
 Button lock (automatic or manual)
 2 multifunctional inputs, freely selectable for:
 Operating mode switchover contact (keycard, window contact, etc.)

Changeover sensor for automatic heating / cooling mode

External room temperature or return air temperature sensor

Dewpoint sensor

Electric heater enable

Faults

Monitor input for temperature sensor or switch status
 One DC 0...10 V input for damper position feedback
 Floor heating temperature limit
 Reload factory settings for commissioning and control parameters
 KNX bus (terminals CE+ and CE-) for communication with Synco or KNX
compatible devices
 Display of outside temperature or time of day via KNX bus
 Time scheduling and central control of setpoints via KNX bus
 A RMB7xx / RMU7xx controller (signal exchange over KNX) uses:

the air demand signal of the thermostat to optimize supply air temperature.

the energy demand signals of the heating / cooling device to optimize energy
supply.

the damper position feedback (DC 0...10 V) to optimize supply fan speed.
RDG400KN Room thermostat with KNX communications CE1N3192en
01 Jun 2010