Siemens RDF302 User Manual

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Siemens RDF302 Basic documentation CE1P3079en
Smart Infrastructure 2022-06-17
5. Connection
5.1 Connection terminals
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.

Siemens RDF302 Specifications

General

Brand	Siemens
Model	RDF302
Category	Thermostat
Language	English