Document No. 129-497
Installation Instructions
May 18, 2011
S1
B2
B1
M1
Y1
I
II
III
SN
SP
SN
1
3
9
8
7
D1
GND
4
2
10
11
12
N1
E1
6
5
TH0901R1
Figure 3. RDF20U.
Terminal
Position
RDF20U Terminal Function
1
Ground for control signal
2
Operating voltage 24 Vac
negative
3
Operating voltage 24 Vac
positive
4
Heating/cooling output NO
5
Heating/cooling output NC
6
Electric heater output NO
7
Heat/Cool changeover sensor
8 Measuring
Neutral
9
Remote air sensor
10,11, 12
Fan speed output III, II, I
D1,
GND
Signal input for potential-free
operating mode changeover
switch
TH0896R1
S1
B2
M1
Y1
I
II
III
SN
SP
SN
5
7
2
3
D1
Siemens Industry, Inc.
Page 3 of 7
G
1
6
N1
10
11
12
ND
B1
4
Figure 4. RDF50.1U.
3
2
T F
3
2
3
2
T
3
2
QAH11.1
T F
T F
TH0890R1
Figure 5. RDF50.1U.
Terminal
Position
RDF50.1U
Terminal Function
1
0 to 10 Vdc output for valve
2
Heat/Cool changeover sensor
3 Measuring
neutral
4
Return air sensor
5
Operating voltage 24 Vac,
negative
6
Operating voltage 24 Vac,
negative
7
Operating voltage 24 Vac
positive
10,11,12
Fan speed output III, II, I
D1,
GND
Signal input for potential-free
operating mode changeover
switch
T F
7
8
7
8
7
8
T
7
8
QAH11.1
T F
T F
TH0900R1
Figure 7. RDF10U, and
RDF20U.
