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1x RXC21.5/00021 Room controller

  • RXC21.5/00021 Room controller
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1x RXC21.5/00021 Room controller

€156,00
€156,00
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RXC21.5/00021 Room controller1x RXC21.5/00021 Room controller1x RXC21.5/00021 Room controller1x RXC21.5/00021 Room controller

Siemens RXC21.5/00021 Desigo Room Controller — LonWorks, Fan Coil / Outside Air Damper Control

DIN-rail room automation controller for fan coil, chilled ceiling, and radiator systems

Overview

This is a Siemens Desigo RXC21.5/00021, a room controller from the RXC room automation series, built for precise temperature regulation in fan coil systems, chilled ceilings, and radiator installations. It communicates over a LonWorks bus and connects to PPS2-compatible room units, with the factory-loaded OOO21 application configured for 3-speed fan and outside air damper control — providing a ready-to-deploy solution for individual room climate control in commercial and industrial buildings.

Key Features

  • PI control algorithm: Delivers accurate, stable regulation of room temperature for consistent comfort conditions.
  • LonWorks and PPS2 communication: Bus communication over LonWorks with PPS2 room unit compatibility for straightforward integration into existing building automation systems.
  • 3 relay outputs plus triac outputs: Three volt-free relay outputs (250V, 5(4)A) alongside 24V AC triac outputs supporting PWM and 3-position control for fan coils and HVAC equipment.
  • Flexible DIN-rail or surface mounting: Screw-fixed DIN-rail mounting suited to ceiling voids, fan coil units, or panel installation.
  • eu.bac certified: Meets European energy-efficiency standards for building automation equipment.
  • No separate 24V supply needed: The controller powers connected field devices directly, simplifying wiring for the overall installation.

What's Included

Model Function Qty
RXC21.5/00021 Room controller, fan coil / outside air damper 1

Technical Specifications

Power supply: AC 230V, 50/60 Hz, 12 VA power consumption.

Control algorithm: PI (Proportional-Integral).

Communication: Bus — LonWorks; Room unit — PPS2; Service plug — RXT20.1.

I/O: 1 analog input, 2 digital inputs.

Relay outputs: 3, switching voltage 250V, switching current 5(4)A.

Triac outputs: PWM / 3-point, switching voltage 24V, switching current 0.5A.

Mounting: DIN-rail, with screws; suitable for ceiling voids (with cover), fan coil units, or panels.

Dimensions: 113 x 167 x 62 mm.

Protection rating: IP20.

Operating temperature: 0°C to 50°C.

Compatibility & Applications

Part of Siemens's Desigo RXC room automation platform, this controller integrates with LonWorks bus networks and PPS2-compatible QAX room units for a complete room climate control system. It's well suited to commercial and industrial HVAC applications requiring individual room control of fan coil units, chilled ceilings, and radiators, with eu.bac certification supporting energy-efficient building automation projects.

A1Customer — Industrial Automation Equipment | Tampere, Finland
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