Connection diagrams - Basic Documentation - RDF302 - RDF302.B - RDF302/VB

Semi-flush mount room thermostats with RS485 Modbus communications RDF302, RDF302.B, RDF302/VB

Product Family
Product Group
Thermostats (temperature controller with sensor)
Content Language
English
Content Type
Technical Documentation > Basic Documentation
Product Version
Status
Valid
Date
2022-06-17
Document No
CE1P3079en
Download ID
A6V10350339
Stock No.
S55770-T238
S55770-T416
S55770-T428
Product No.
RDF302
RDF302.B
RDF302/VB
Access level
Internet
File Type
html
Application

N1 Room thermostat RDF302...

M1 1- or 3-speed fan

V1 Valve actuator, 2- or 3-position

V1, V2 Valve actuator, 2-position

E1 Electric heater

C1, C2 1-stage compressor

S1, S2 Switch (keycard, window contact, presence detector, etc.)

B1, B2 Temperature sensor (return air temperature, external room temperature, changeover sensor, etc.)

+ RS485 Modbus connection

- RS485 Modbus connection

REF RS485 signal/common ground (Differential common)

RDF302.B does not have inputs X1, X2 and M.

2-pipe / heating or cooling – ON/OFF

2-pipe, / heating or cooling – 3-position

Y11 = Open

Y21 = Close

2-pipe and el. heater/

Heating or cooling

and el. Heater

4-pipe /
Heating and radiator

V1 = Heating

V2 = Cooling

1-stage compressor

C1 = Heating

and / or

C2 = Cooling

1-stage compressor and electric heater