3 856 s Desigo™ RXC Room controller RXC39.5 Communicating room controller for fan-coil applications The RXC39.5 room controller is used for temperature control in individual rooms.
Use The RXC39.5 room controller is optimized for control of fan-coil systems with ECM fans in individual rooms. The controller application is determined by downloadable application software, also referred to simply as the “application”. The various applications and the associated functions are described in detail in the applications library: CA110300. The controller is delivered with basic application 00039.
Technical design The RXC39.5 controller consists of a housing base, a housing cover and the printed circuit board with connection terminals. The controller also has a tool socket, a programming LED and a programming button. 80048 Cable restraints Plug-in connection terminals for bus Plug-in Connection terminals Connector for extension modules Cover Housing base Plug-in Connection terminals Service LED Service pin Tool socket Terminal cover Terminal covers (RXZ30.
All connection terminals are detachable plug-in terminals. They are arranged so that, under normal circumstances, all incoming and outgoing cables can be connected without crossing. Cable strain relief The conductors to the connection terminals can be secured with cable ties to the housing base. Communication The RXC39.
Service LED The yellow service LED shows the current operational status of the controller by means of different flashing patterns (see the RXT10 user manual, CM110669). Service pin The service pin is used to identify the controller in the commissioning phase. When the pin is pressed the controller’s identification number is transmitted to the RXT10 commissioning and service tool.
AC 24 V triac outputs Example • The simultaneous load on outputs Y1, Y2 must not exceed 12 VA • The maximum load on each output must not exceed 12 VA Equipment Y1, Y2 Simultaneous load: 2 thermic valve actuators, type STP73 6 VA each 2 thermic valve actuators * 6 W (12 W) ** 6 W (12 W) * The heating and cooling sequences are never operative simultaneously. Therefore only the actuators for one of the two sequences need to be included when calculating the total load.
Commissioning The RXC39.5 controller is commissioned with the RXT10 commissioning and service tool. This is connected to the LONW ORKS bus via a tool socket (on the controller or room unit). The commissioning procedure for the entire Desigo RXC range is described in detail in the RXT10 user manual, document CM110669. Labeling The labeling fields “Appl.” and “Loc.
Inputs (SELV) Signal inputs D1 … D4 (for volt-free contacts) Contact voltage Contact current Contact transfer resistance Contact insulation resistance Switch time: Universal input X1 Compatible temperature sensors Measuring range Sensor current Resolution Measuring error (without cable) or Measuring input for DC 0 ...
Cable connections Plug-in terminal blocks Solid conductors Rising cage terminals 1 x 0.2 ... 2.5mm2 or 2 x 0.2 ... 1.0 mm2 1 x 0.2 ... 2.5mm2 Stranded conductors without or 2 x 0.2 ... 1.5 mm2 connector sleeves Stranded conductors with connector 1 x 0.25 ... 2.5mm2 sleeves (DIN 46228/1) or 2 x 0.25 ... 1.0 mm2 Max. tightening torque 0.6 Nm Single cable lengths for field devices See also the RXC installation guide, CA110334 Signal inputs D1…D4 Max. 100 m with diameters ≥ 0.
22 23 24 25 CLB CLA CLB CLA YC4 G YC3 G0 0...10 V OUT G 0...10 V OUT YC2 0...10 V OUT G0 Bus LONWORKS® Technology 1 3 4 QAX... 0...
Caution Tool socket • Observe the technical data for the relay outputs: max. AC 250 V, 1.8 KW • External fuse (essential!): max. 10 A • Local installation regulations must be observed. Proprietary RJ45-type tool socket 3206Z01 12 3 45 67 8 1 2 3 4 LonWorks®, Data A (CLA) LonWorks®, Data B (CLB) Not used Not used 5 6 7 8 Not used Not used CP+ CP– Connection diagram Connection of field devices, room unit, bus and power supply N1 B1, B2 B1.1 D1...D4 R1 Q1, Q2 Y01, Y02 Y1...Y4 RXC39.
Parallel connection of several thermal actuators 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. STOP Mixed operation: Connecting thermic actuators to the controller as well as to the power amplifier is NOT allowed.
Dimensions Dimensions in mm 3876M01 90 110 35,3 Without terminal covers 3,9 1 62 50 With terminal covers 62 120 35,3 6 3,9 1 161 3876M02 152 13 / 14 Siemens Building Technologies RXC39.
Drilling diagram 100 80056 135 Published by: Siemens Switzerland Ltd. Building Technologies Division International Headquarters Gubelstrasse 22 6301 Zug Switzerland Tel. +41 41-724 24 24 www.siemens.com/buildingtechnologies © Siemens Switzerland Ltd 2012 Delivery and technical specifications subject to change 14 / 14 Siemens Building Technologies RXC39.
