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Siemens
RDU340… Basic Documentation
CE1P3078en
Building Technologies
Engineering
2014-11-03
6 Engineering
6.1 Connection
terminals
G
X1
M
G0
Y21
Y10 G0
SELV
X2
L
G, G0 Operating voltage controller AC 24 V
L
Operating voltage for electrical heater AC
230 V
Y21
Control output for electrical heater
Y10
Control output for DC 0…10 V actuator
X1, X2 Multifunctional input for temperature
sensor (e.g. QAH11.1) or switch
M
Measuring neutral for sensor and switch
6.2 Connection
diagrams
Application:
Single duct in
VAV/CAV
Heating or cooling
for universal or AHU
For US installations, use Class 2 rated power supplies.
For other installations, use circuit breakers with rated cu rrent of no more than 10 A.
N1
Room temperature controller RDU340...
V1
DC 0…10V actuator for heating or
cooling
S1
Operating mode switch-over contact
(e.g. key card)
B2
Heat/cool changeover sensor
Application:
Single duct with
electrical heater in
VAV/CAV
Heating and cooling
with electric heater
for universal or AHU
For US installations, use Class 2 rated power supplies.
For other installations, use c ircuit breakers with rated cu rrent of no more than 10 A.
N1
Room temperature controller RDU340...
V1
DC 0…10V actuator for heating or
cooling
E1
Electrical heater
S1
Operating mode switch-over contact
(e.g. key card)
B2
Heat/cool changeover sensor
