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Parallel connection of
several thermic
actuators
Note!
STOP
Connection to controller
Connection to
power amplifier
Notes
Siemens
Building Technologies
Up to 2 thermic actuators can be connected directly to the room controller.
In the case of more than 2 actuators a power amplifier is required.
The same principle applies to output Y3.
Note that the simultaneous load on outputs Y3 and Y4 must not exceed 9.5 VA.
Power consumption at input X1 of the UA1T: 0.5 VA.
Mixed operation: Connecting thermic actuators to the controller as well as to the
power amplifier is NOT allowed.
Differing voltage of the power supply of the controller and the supply of the power
amplifier may cause big differences in the position of the valves.
N1
G
G
G0
G0
Y1
G
AC 24 V
AC 24 V
N1
G G0
G G0
G
G0
Y1
G
N1
RXC32
N2
UA1T (see data sheet CA2N3591)
Y3
AC 24 V thermic valve actuator
Y3.x
AC 24 V thermic valve actuator (max. 2 STA72E / STP72E actuators per Y1
output on the UA1T)
• The UA1T requires an AC 24 V supply voltage
• The UA1T is not suitable for the connection of 3-position actuators.
RXC32 – Room controller for VAV systems
AC 24 V
Y3
Y3
N2
NS
COM
1
LS
Y1
2
3
COM
COM
X1
Y1
4
N2
NS
COM
1
LS
Y1
2
COM
COM
3
X1
Y1
4
00105 H
Y3.1
Y3.1
8
7
Y3.2
6
5
Y3.5
8
7
Y3.6
6
5
CA2N3845en_06
00105 K
Y3.3
Y3.4
Y3.7
Y3.8
13/14
2013-06-18
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