Siemens Desigo RXC22.5

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CA2N3834en_09

2013-06-16

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 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

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

Main Page

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Summary

Use

Functions

Design

Connection terminals

Communication

Engineering notes

AC 230 V volt-free relay outputs

AC 24 V triac outputs

Mounting instructions

Commissioning notes

Technical data

Power supply

Details operating voltage, rated voltage, frequency, and power consumption.

Operating data

Covers control algorithm for inputs and measured value input specifications.

Inputs

Lists signal inputs D1, D2 (volt-free contacts) and measured value input B1.

Outputs

Details AC 24 V triac outputs (Y1-Y4) and relay outputs (Q14, Q24, Q34, Q44).

Interfaces

Describes interface to room unit (PPS2) and LONWORKS® bus communication.

Cable connections

RXC20 Connection Terminals

Relay output

Details terminals Q13 and Q14 for relay output feed and N/O contact.

RXC21 Connection Terminals

RXC22 Connection Terminals

Power supply

Identifies terminals N and L for AC 230 V neutral and phase supply.

Relay outputs

Connection diagrams

Parallel connection of several thermic actuators

Connection to controller

Diagram showing direct connection of thermic actuators to the room controller.

Connection to power amplifier

Diagram illustrating connection of thermic actuators via a power amplifier.

Dimensions