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Product Description
Siemens RDG400, S55770-T164
Room thermostat, AC 24 V, VAV heating and cooling systems
- 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
- 3 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
- Operating modes: Comfort, Energy Saving and Protection
- Modulating PI control
- Control depending on the room or the return air temperature
- Automatic or manual heating / cooling changeover
- Adjustable commissioning and control parameters
- Minimum and maximum setpoint limitation
- Minimum and maximum limitation of air flow signal
- Output signal inversion (DC 0...10 V) as an option
- Backlit display
- Single-duct system
- Single-duct system with electrical heater
- Single-duct system and radiator / floor heating
- Single-duct system with heating / cooling coil
Datasheet
The Siemens RDG400 is a versatile room thermostat designed for AC 24V VAV heating and cooling systems. With multiple output options including DC 0-10V for VAV actuator and auxiliary output, as well as ON/OFF, PWM, or 3-position control, this thermostat offers precise and customizable control for your HVAC system.
Equipped with three multifunctional inputs for keycard contact, external room/return air temperature, and more, the RDG400 offers flexibility and functionality. Operating modes such as Comfort, Energy Saving, and Protection allow you to easily adjust settings to meet your specific needs. The modulating PI control and control depending on room or return air temperature ensure optimal temperature regulation.
Additional features such as automatic or manual heating/cooling changeover, adjustable commissioning parameters, and minimum/maximum setpoint limitations make the Siemens RDG400 a reliable and efficient choice for your heating and cooling system. Whether you have a single-duct system, electrical heater, radiator/floor heating, or heating/cooling coil, this thermostat can be easily adapted to suit your needs. With a backlit display for easy visibility, the Siemens RDG400 is a smart choice for precise temperature control.
