Connection terminals - 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

L, N Operating voltage AC 230 V

Q1 Control output “Fan speed 1 AC 230 V”

Q2 Control output “Fan speed 2 AC 230 V”

Q3 Control output “Fan speed 3 AC 230 V”

Y11,Y21 Control output “Valve” AC 230 V (N.O., for normally closed valves), output for compressor or output for electrical heater

X1, X2 1) Multifunctional input for temperature sensor (e.g. QAH11.1) or potential-free switch

Factory setting:
X1 = Operating mode switchover contact
X2 = External sensor
(function can be selected via parameter P38/P40).

M 1) Measuring neutral for sensor and switch

+ RS485 Modbus connection

- RS485 Modbus connection

REF RS485 signal/common ground

(Differential common)

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