Searching for "Siemens RCS 802 download" on Google or file-sharing sites returns dozens of results. Most are dangerous. Here is why verification is non-negotiable:

There is only one 100% verified source: Siemens Industry Online Support (SIOS). However, generic guest users cannot always access legacy software. Follow this verified path:

RCS 802 (often referred to as Room Control System 802) is a legacy configuration and commissioning tool used primarily for Siemens room automation devices. It was commonly deployed with older generations of room thermostats, VAV controllers, and terminal unit controllers found in HVAC systems.

The software allowed technicians to:

Important Note: This software is considered End-of-Life (EOL) by Siemens. It has been superseded by the Siemens Desigo CC and ACS (Apogee) software suites.

RCS 802 is a Windows-based engineering tool used for:

Common use cases: Hospitals, office towers, universities, and data centers with legacy Siemens infrastructure.

Version note: RCS 802 has been largely superseded by Desigo CC or RCS 803, but many facilities still rely on 802 for maintenance.


Searching for "RCS 802 download" often leads to third-party file hosting sites, torrents, or unverified forums. Downloading from these sources carries three major risks: