User Manual

ManualsBrandsSiemens ManualsBuilding automationRoom controllers RXC20.., RXC21.., RXC22..

CA2N3834en_12

2015

-12-23

Building Technologies

834

Desigo

™ RXC

Room controllers

RXC20.1 / RXC20.5

RXC21.1 / RXC21.5

RXC22.1 / RXC22.5

For fan

-coil systems, chilled ceilings and radiators

with LONMARK® compatible bus communications

The RXC20, RXC21 and RXC22 room controllers are used for temperature control

in individual rooms.

• For 2-pipe or 4-pipe fan-coil systems, with or without change-over

• For chilled ceilings and radiators

• Control of AC 24 V PDM

thermic valve actuators, 3-position AC 24 V valve

and damper actuators, or electric heating coils

• Volt-free relay contacts for fan control and electric heating coils

• PI or PID control (depending on application)

• Downloadable application software

• L

ONMARK® compatible bus communications

• For use in the Desigo building automation and control system

• AC 230 V operating voltage

1) PDM = pulse/duration modulated

Summary of content (16 pages)

PAGE 1
3 834 s Desigo™ RXC Room controllers RXC20.1 / RXC20.5 RXC21.1 / RXC21.5 RXC22.1 / RXC22.5 For fan-coil systems, chilled ceilings and radiators with LONMARK® compatible bus communications The RXC20, RXC21 and RXC22 room controllers are used for temperature control in individual rooms.
PAGE 2
Use The RXC20, RXC21 and RXC22 room controllers are optimized for control of fan-coil systems, chilled ceilings and radiators in individual rooms. The following versions are available for fan-coil systems: • RXC20: 1-speed automatic fan control • RXC21: 1- to 3-speed automatic fan control • RXC22: 1- to 3-speed automatic fan control with integrated relay for electric re-heating The controller application is determined by downloadable application software, also referred to simply as the “application”.
PAGE 3
Ordering When ordering please specify the quantity, product name, type code and application. The controllers are delivered with the basic application 00020, 00021 or 00022, respectively. The RXZ20.1 terminal covers are supplied in packs of 1 pair and must be ordered separately. Example: 30 30 RXC20.5 room controllers Pairs of terminal covers RXC20.5/00020 RXZ20.1 Compatibility The QAX… room units and the Siemens field devices can be used with the RXC20, RXC21 and RXC22 room controllers.
PAGE 4
Neuron ID Bar code, Code 39 (ID number) Protection standard Temperature range (0 … 50 °C) Serial No. Test date, series (Z, A, B, C…) Observe notes in this document Factory-loaded application Definitive application Location Options for use of the labeling fields “Appl.” and “Loc.”: − Hand-written entry of the location and the loaded application ...
PAGE 5
LONW ORKS® bus and PPS2 The diagram below shows the wiring of the LONW ORKS® bus and PPS2 interface when a QAX… room unit is connected. It also shows the options for connecting the RXT10 commissioning and service tool and the RXT20.1 service terminal. Service LED The yellow service LED shows the current operational status of the room controller by means of different flashing patterns (see the RXT10 user manual, CM110669).
PAGE 6
AC 230 V supply cables • The dimensions and fuse protection for the supply cables depend on the total load and on local regulations. The cables must be secured with cable restraints. • If serial wiring is applied on the terminal block 19/21, the connection will be interrupted if the block is removed from the controller (the jumpers 19-19 and 21-21 are on the PCB, not in the block, see terminal diagrams on pages 10 … 12).
PAGE 7
When mounting note the following: • The controller should not be freely accessible after mounting. • Ensure adequate air circulation to dissipate heat generated during operation. • Easy access is required for service personnel • Local installation regulations must be observed. The mounting instructions and a drilling template are printed on the controller packaging. Commissioning notes The RXC20, RXC21 and RXC22 room controllers are commissioned with the RXT10 commissioning and service tool.
PAGE 8
Technical data Power supply Operating data Inputs Signal inputs D1, D2 (for volt-free contacts) Measured value input B1 Outputs AC 24 V triac outputs, Y1 ...
PAGE 9
Cable connections Plug-in terminal blocks Solid conductors Stranded conductors without connector sleeves Stranded conductors with connector sleeves (DIN 46228/1) Max. tightening torque Single cable lengths Signal inputs D1, D2 Measured value input B1 AC 24 V triac outputs, Y1 ... Y4 Relay outputs Q14, Q24, Q34, Q44 Interface to room unit Cable type LONWORKS® bus Cable type Tool connecting cable Rising cage terminals 1 x 0.2 ... 2.5mm2 or 2 x 0.2 ... 1.0 mm2 1 x 0.2 ... 2.5mm2 or 2 x 0.2 ... 1.5 mm2 1 x 0.
PAGE 10
7 8 9 13 14 15 16 GND D2 Y1 G Y2 G CP– 17 18 CLB 6 CLA 5 CLB 4 CLA 3 CP+ 2 D1 1 B1 RXC20 M Connection terminals LonWorks® T 2 1 3 4 QAX... Bus M 3804A02 19 19 21 21 Q14 Q13 5(4) A L L N N AC 230 V 25 26 Measured value input B1 1 Measured value input with LG-Ni 1000 sensor M 2 Measured value input ground Signal inputs D1 3 Signal input GND 4 Signal ground D2 5 Signal input Triac outputs Y1 6 AC 24 V, 0.5 A switching output G 7 AC 24 V actuator supply Y2 8 AC 24 V, 0.
PAGE 11
8 9 10 11 12 13 14 15 16 GND D2 Y1 G Y2 G Y3 CLB 1 3 4 QAX... CLA 2 LonWorks® T 3804A03 Q34 Q24 Q13 L L Q14 5(4) A AC 230 V N Bus M M N 17 18 CLB 7 CLA 6 CP+ 5 Y4 4 CP– 3 G 2 D1 1 B1 RXC21 M Connection terminals 25 26 27 28 19 19 21 21 Measured value input B1 1 Measured value input with LG-Ni 1000 sensor M 2 Measured value input ground Signal inputs D1 3 Signal input GND 4 Signal ground D2 5 Signal input Triac outputs Y1 6 AC 24 V, 0.
PAGE 12
6 7 8 9 13 14 15 16 GND D2 Y1 G Y2 G CP– CP+ 2 1 3 4 QAX... 17 18 CLB 5 CLA 4 CLB 3 CLA 2 D1 1 B1 RXC22 M Connection terminals LonWorks® T Bus M 3804A04 Q34 Q24 Q13 Q44 Q43 N.C. 19 19 21 21 22 23 24 Q14 5(4) A 10 A L L N N AC 230 V 25 26 27 28 Measured value input B1 1 Measured value input with LG-Ni 1000 sensor M 2 Measured value input ground Signal inputs D1 3 Signal input GND 4 Signal ground D2 5 Signal input Triac outputs Y1 6 AC 24 V, 0.
PAGE 13
Connection diagrams Connection of field devices, room unit, LONWORKS® bus and power supply LonWorks® Bus LonWorks® Bus N1 B1 D1, D2 Y1...Y4 Y1.1 Y1.2, Y2.2, Y3.1 Y3.2, Y4.2 B2 Q1 Q1.1 Q2 RXC20, RXC21, RXC22 Temperature sensor LG-Ni 1000 Volt-free contacts (window contact, occupancy sensor, etc.
PAGE 14
Parallel connection of several thermic actuators 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 outputs Y2 … Y4. Note that the simultaneous load on outputs Y1 … Y4 must not exceed 9.5 VA. Power consumption at input X1 of the UA1T: 0.5 VA. STOP Note! Mixed operation: Connecting thermic actuators to the controller as well as to the power amplifier is NOT allowed.
PAGE 15
(all Dimensions in mm) 4,4 3,3 35,3 133,2 Without terminal covers 3,9 1 62 51,5 5 167 35,3 With terminal covers 3834M02 Dimensions 3,9 1 112,4 107,8 3834M01 62 70211 Drilling diagram 39 78 3,6 43,2 86,3 15/16 Siemens Building Technologies RXC20, RXC21, RXC22 – Room controllers CA2N3834en_12 2015-12-23
PAGE 16
Published by: Siemens Switzerland Ltd. Building Technologies Division International Headquarters Gubelstrasse 22 6301 Zug Switzerland Tel. +41 41-724 24 24 www.siemens.