User Manual

7-19
Heating, ventilation and air conditioning - room temperature control
Room thermostats
Wall-mounted
Siemens Switzerland Ltd
Building Technologies Division
2019www.siemens.com/gamma
7
Stock No. Product No. DT
S55770-T348 RDG405KN A
RDG405KNRoom thermostat for temperature and air quality control with KNX
communications, AC 24 V, VAV heating and cooling systems
• KNX communications
• Output DC 0…10 V for VAV actuator and auxiliary output ON/OFF, PWM or 3-position or 3-position for
VAV actuator and auxiliary output DC 0...10 V
• 2 multifunctional inputs for keycard contact, external room / return air temperature (1x, QAH11.1,
QAA32), heat / cool changeover, operation mode changeover, window contact on/off, dewpoint
monitor, electrical heater enabled, fault contact, presence detector
• 1 input DC 0...10 V for damper position feedback, for CO2 sensor
• Operating modes: Comfort, Economy and Protection
• Modulating PI control
• Control depending on the room or the return air temperature and air quality
• Automatic or manual heating / cooling changeover
• Adjustable commissioning and control parameters
• Minimum and maximum setpoint limitation
• Minimum and maximum limitation of air ow signal
• Output signal inversion (DC 0...10 V) as an option
• Backlit display
Application selectable:
• Single-duct system
• Single-duct system with electrical heater
• Single-duct system and radiator / oor heating
• Single-duct system with heating / cooling coil
Data sheet N3192
Operating voltage AC 24 V
Power consumption 2 VA
Setpoint setting range 5…40 °C
Switching differential Heating: 0.5…6 K
Cooling: 0.5…6 K
Communication Bus: KNX (S-mode and LTE mode with Synco 700)
Analog inputs, number 2
Analog outputs VAV actuator, electric heater, valve
Analog outputs, number 1
Analog output, signal DC 0...10 V
Analog output, current Max. ±1 mA
Digital inputs, number 1
Triac outputs VAV actuator, valve, el. heater
2-position, PWM, 3-position
Triac outputs, number 1
Triac output, switching voltage AC 24 V
Triac output, switching current Max. 1 A
Type of xing Wall mounting with screws
Degree of protection IP30
Dimensions (W x H x D) 93 x 128 x 30.8 mm
13-Smart thermostats.indd 19 19.08.2018 15:12:47