Data Sheet for Product

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Siemens RDF302… Flush-mounted room thermostats with RS485 Modbus communications CE1N3079en

Smart Infrastructure 2020-02-21

Mechanical design

The thermostats consist of 2 parts:

Front panel with electronics, operating elements and built-in room temperature

sensor.

Mounting base with power electronics.

The rear of the mounting base contains the screw terminals.

The base fits on a square conduit box with 60.3 mm fixing centers.

Slide the front panel in the mounting base and snap on.

RDF302, RDF302/VB, RDF302.B

1 Operating mode selector

2 Change fan operation

3 Adjust setpoints and control parameters

1 Operating mode

Protection

Comfort

Economy

2 Displays room temperature,

setpoints and control parameters

Symbol indicates current room

temperature

3 Fan mode

Auto fan active

Fan speed

low, medium, high

4 Indicates fault or reminder

5 Heating/cooling mode

Cooling

Heating

Electrical heater active

6 Condensation in room (dew point

sensor active)

7 Additional user information, like

outdoor temperature

( )

or time

from Modbus (selectable via

parameters)

8 Key lock active

Operation and settings

Display