3 3877P01 877 RXL Room controllers Communicating controllers for fan-coil applications FC-10, FC-11, FC12 RXL21.1 RXL22.1 The RXL21.1 and RXL22.1 room controllers are used for temperature control in individual rooms.
Application The RXL21.1 and RXL22.1 room controllers are optimized for control of fan-coil systems in individual rooms. The following options are available with fan-coil systems: • RXL21.1: Single-speed to 3-speed automatic fan control • RXL22.1: Single-speed to 3-speed automatic fan control with integrated relay for electric re-heater The application of each controller is determined by the application software.
Applications The following applications are available for the RXL2… room controllers: Application group (type) Fan-coil applications FC-10 (with RXL21.
Compatibility The RXL2… room controller is compatible with field devices from Siemens Building Technologies. For details, refer to the Desigo RX hardware overview, CA2N3804. Design The RXL2... controllers consist of a housing base, a housing cover and the printed circuit board with connection terminals. The controllers also have a tool socket, a service LED and a programming pin.
Terminal cover 3873J02 Terminal covers (RXZ20.1) are available as an option, to protect the connection terminals from physical contact and dirt. The service LED remains visible when the terminal covers are in place, and the service pin can be operated with a pointed implement. The cable is connected to the room controller by breaking out the perforated cable entry guide. Removing the terminal cover Identification number (unique serial number) 3877Z04 Label (example for RXL21.
Communication The RXL2… controllers communicate with other devices via the following interfaces: • PPS2 interface (proprietary) for the exchange of data with the room units • Bus (terminals CE+ and CE-) for communication with: − PX/KNX interface (to Desigo Insight) − Interface OCI700 (to Synco) − Other RXL controllers The tool socket (RJ45) must be connected only by a qualified electrician. The adjacent terminal may be a live mains voltage conductor.
Disposal The device is classified as waste electronic equipment in terms of the European Directive 2012/19/EU (WEEE) and should not be disposed of as unsorted municipal waste. The relevant national legal rules are to be adhered to. Regarding disposal, use the systems setup for collecting electronic waste. Observe all local and applicable laws.
Mounting instructions 3873J07 3873J06 The room controllers can be mounted in any orientation, and fixed as follows: Rail mounting The housing base is designed for snapmounting on DIN rails, type EN50022-35 x 7.5 (can be released with a screwdriver). Surface mounting There are two drill holes for screw-mounting (see “Dimensions” for drilling template). The housing base is fitted with raised supports. Screws: Max. diameter 3.5 mm, min. length 38 mm STOP Note! Tightening torque for fixing screws max. 1.
Technical data Power supply Caution Operating data Inputs Signal inputs D1, D2 (for volt-free contacts) Measured value input B1 Outputs AC24 V triac outputs , Y1 … Y4 Operating voltage Frequency Power consumption with connected field devices Control algorithm AC 24 V ± 20 % (SELV / PELV) 50/60 Hz Max. 15 VA (RXL21.1) Max. 16 VA (RXL22.1) None Fuse slow max. 10 A or Circuit breaker max. 13 A Characteristic B, C, D according to EN 60898 or Power source with current limitation of max.
Cable connections Connection terminals for signals and power supply Bus connection terminals (plug-in screw terminals) Single cable lengths Signal inputs D1, D2 Measured value input B1 AC24 V triac outputs , Y1 … Y4 Relay outputs Q14, Q24, Q34, Q44 Interface to room unit Cable type Bus Tool connecting cable Solid or stranded conductors 0.25 … 2.5 mm2 or 2 x 1.5 mm2 Solid or stranded conductors 2 x max. 1.0 mm2 e.g. YCYM 2x2x0.8 For field devices, see also the RXB & RXL installation guide, CM110381 Max.
D2 Y1 G Y2 Bus T 2 Q34 Q24 Q14 Q13 AC 230V 5(4)A G G G0 AC 24 V SELV / PELV 1 4 3 QAX... M M G0 3877A08 GND 17 18 CE – D1 10 11 12 13 14 15 16 CE + 9 CE – 8 CE + 7 CP + 6 Y4 5 CP – 4 G 3 Y3 2 N.C. 1 B1 RXL21.1 M Connection terminals 25 26 27 28 19 19 21 21 Measured value input B1 1 Measured value input for LG-Ni 1000 sensors M 2 Measured value input ground Signal inputs D1 4 Signal input GND 5 Signal ground D2 6 Signal input Triac outputs Y1 7 AC 24 V, 0.
D2 Y1 G Y2 3877A09 GND CE – D1 17 18 10 11 12 13 14 15 16 CE + 9 CE – 8 CP + 7 CE + 6 N.C. 5 CP – 4 N.C. 3 N.C. 2 N.C. 1 B1 RXL22.1 M Connection terminals Bus T 2 1 4 3 QAX... 22 23 24 Q34 Q24 Q14 Q44 Q13 19 19 21 21 Q43 N.C.
Connection diagrams Connection of field devices, room unit, bus and power supply N1 1 M 2 D1 4 GND 5 D2 6 T B1 D1 D2 Y1 Y1 7 G 8 Y2 9 Y1.1 GL Y2 Y3 Y3 10 G 11 Y4 12 1 M 2 D1 4 GND 5 D2 6 Y1 7 G 8 Y2 9 T M M B1 D1 D2 Y1.2 Y1.1 Y1 Y1.2 M GL M M Y2 Y3.2 Y3.1 GL B1 3877A11_01 N2 B1 Y2.
Parallel connection of several thermic valve actuators Up to two thermic actuators per sequence may be connected directly to the room controller. With more than two thermic actuators, a UA1T power amplifier is required. The principle is the same for output Y2. Do not exceed the maximum simultaneous load on outputs Y1 and Y2 (max. 9.5 VA). Power consumption at input X1 of the UA1T: 0.5 VA. Mixed operation: It is not permissible to connect thermic actuators both to the controller and to the power amplifier.
Dimensions 4,4 Dimensions in mm 3,3 35,3 133,2 3873M14 Without terminal cover 3,9 1 62 51,5 5 62 3,9 1 167 35,3 3877M15 With terminal covers 112,4 107,8 15/16 Siemens Building Technologies RXL21.1, RXL22.
Drilling diagram (1:1) 3873M16 39 78 3,6 43,2 86,3 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 2006 Delivery and technical specifications subject to change 16/16 Siemens Building Technologies RXL21.1, RXL22.
