Siemens Desigo RXC21.1 User Manual

CA2N3834en_09
2013-06-16
Building Technologies
s
3
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 L
ONMARK® 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
1)
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

Siemens Desigo RXC21.1 Specifications

General

Product Type	Room controller
Power Supply	24 V AC/DC
Mounting	DIN rail mounting
Degree of protection	IP20
Communication Protocol	KNX
Outputs	3 relay outputs
Operating Temperature	0…+50 °C
Operating voltage	24 V AC/DC

Summary

Use and Product Versions

I/O Module Functionality

Describes how room controllers function as universal I/O modules for building automation systems.

Design and Components

Safety and Communication

Electrical Safety Warning

Crucial safety instruction to ensure power is off before handling plug-in terminals connected to mains voltage.

Device Communication Interfaces

Describes LONWORKS bus and PPS2 interfaces for communication with other devices.

Technical Data Overview

Power Supply and Operating Data

Input and Output Specifications

Lists signal inputs, measured value inputs, triac outputs, and relay output specifications.

Connection Terminals and Diagrams

RXC20 Connection Terminals

RXC21 Connection Terminals

RXC22 Connection Terminals

Connection Diagrams

Illustrates wiring of field devices, room unit, LONWORKS bus, and power supply.

Mounting and Installation

Mounting Instructions

Commissioning Notes

Provides guidance on commissioning using the RXT10 tool and function testing.