User Manual

12 / 14
Siemens RXC39.5 – Room controller CM2N3856en_07
Building Technologies 2015-12-23
Up to 2 thermal actuators can be connected directly to each triac output of the room
controller. In the case of more than 2 actuators a power amplifier is required.
The example holds for Y2 analogously.
Note that the simultaneous load on outputs Y1 and Y2 must not exceed 12 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 RXC39.5
N2 UA1T (see data sheet CA2N3591)
Y5 AC 24 V thermal valve actuator
Y5.1 AC 24 V thermal valve actuator
1
2
3
4
COM
8
7
6
5
COM
COM
1
2
3
4
COM
8
7
6
5
COM
COM
N1 RXC39.5
N2 UA1T (see data sheet CA2N3591)
Y5 AC 24 V thermal valve actuator
Y5.x AC 24 V thermal valve actuator (max. 2 STA73 / STP73 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.
Parallel connection of
several thermal
actuators
STOP
Note!
Connection to controller
Connection to
power amplifier
Notes