Siemens Desigo™ Building Automation Products:A Complete Technical Overview - Siemens Desigo™ Learn Building Automation from Siemens Supplier

From modular BACnet/IP controllers and touch panel HMIs to precision field sensors and TX-I/O extension modules — everything you need to know about Siemens' flagship BAS product line, supplied by Neva Building Solutions across EMEA. Siemens Desigo™ Learn Building Automation from Siemens Supplier.

Why Siemens Desigo™ Dominates Modern Building Automation - Siemens Desigo™ Learn Building Automation from Siemens Supplier

Modern commercial buildings — offices, hospitals, hotels, data centres, airports, and industrial plants — demand more from their infrastructure than ever before. Energy efficiency regulations, occupant comfort standards, and remote management requirements have made a unified, standards-based Building Automation System (BAS) not a luxury, but a necessity.

Siemens' Desigo™ platform is one of the world's most deployed BAS ecosystems, built around open protocols (BACnet/IP, BACnet/SC, Modbus, KNX) and a modular hardware architecture. Whether you are commissioning a small office unit or a campus-scale facility, the Desigo™ product line scales to fit.

Neva Building Solutions is a specialist supplier and project partner for Siemens building technology products, serving customers across North Africa, the Middle East, Turkic Republics, the Balkans, and Europe. This guide covers the key Siemens products in our portfolio, grouped by function, to help engineers, facility managers, and system integrators select the right components for their projects. Siemens Desigo™ Learn Building Automation from Siemens Supplier

Siemens Building Automation Products Supplied by Neva Building Solutions

Below is an overview of the Siemens products in your requested list and how they fit into building automation projects.

Siemens Building Automation Product

💡 Key Insight : All products listed in this article are part of the Siemens Desigo™ and APOGEE® ecosystems. They are available through Neva Building Solutions with full technical support, project consultation, and fast logistics across our served regions.

Automation Controllers: The Brain of Your BAS

The automation controller is the heart of any BAS installation. It executes control logic, manages data points, communicates with field devices and higher-level management systems, and runs critical functions like alarming, scheduling, and trending. Siemens offers a highly capable controller in the PXC7 family. Siemens Desigo™ Learn Building Automation from Siemens Supplier

Automation Controller

PXC7.E400M

Desigo™ Modular Automation Station — BACnet/IP / BACnet/SC

A freely programmable, modular automation station and system controller for HVAC and building services. Supports up to 200 I/O points via TXM expansion modules, with 250 total BACnet data points. Integrates KNX PL-Link room devices, M-bus energy meters, and Modbus RTU/TCP field devices.

• BACnet/IP, BACnet/SC, Modbus RTU/TCP

• Up to 200 I/O via TXM modules

• KNX PL-Link + M-bus integration

• WLAN interface for commissioning

• Cloud connectivity for remote access

• 24 V AC/DC power supply

  
  

The PXC7.E400M can also act as a system controller, orchestrating a network of other Desigo PXC3, PXC4, PXC5, and PXC7 stations over BACnet/IP or BACnet/SC. This makes it the right choice not only for standalone plant control but also for distributed architectures serving multi-zone or multi-building sites.

Operator Interface: PXM30.E Touch Panel

A powerful controller without a clear operator interface is only half the solution. The PXM30.E gives facility operators and building technicians direct, intuitive access to system status, alarms, schedules, and plant graphics — without needing a laptop or separate workstation.

Touch Panel HMI

PXM30.E

Desigo™ BACnet/IP Touch Panel — 7" Display

A 7-inch BACnet/IP touch panel with integrated web server for local or remote building system operation. Supports plant graphics, alarm views, scheduling, and room environment operation. Scalable from individual technician panels to end-user room control interfaces.

• 7" colour touchscreen (surface mount)

• BACnet/IP with integrated web server

• 24 V AC/DC or Power over Ethernet

• Linux OS, Dual-core 1.5 GHz processor

• 8 GB eMMC / 2 GB RAM

• Tool-free commissioning

The PXM30.E is designed for surface mounting on panel doors or walls. Its BACnet/IP native communication means it can connect directly to any BACnet-compatible automation station — including third-party controllers — making it a versatile choice for retrofit and upgrade projects.

TX-I/O Modules: Flexible Field I/O Expansion

One of Desigo™'s key strengths is its modular I/O architecture. The TXM1 series of I/O extension modules snap directly onto the I/O bus of the PXC automation station, allowing engineers to precisely match the I/O configuration to the application — adding only the channels they need, in the signal types required.

Digital Input Module

TXM1.16D

16-Point Digital Input Module

Provides 16 digital input channels for monitoring potential-free contacts, status signals, alarms, and fault indicators from field devices such as motors, valves, and dampers.

• 16 × DI (potential-free contacts)

• NO / NC contact monitoring

• Snap-on DIN rail mounting

Relay Output Module

TXM1.6R

6-Point Relay Output Module

Delivers 6 relay output channels for switching loads such as fans, pumps, heating elements, and lighting circuits. Ideal for on/off control of HVAC plant items.

• 6 × relay outputs

• Potential-free switching contacts

• DIN rail, plug-in terminals

Universal I/O Module

TXM1.8U

8-Point Universal I/O Module

Eight configurable universal channels supporting analogue inputs (0–10 V, 4–20 mA, resistance), analogue outputs, and digital I/O — a flexible workhorse for mixed-signal applications.

• 8 × configurable AI/AO/DI/DO points

• 0–10 V / 4–20 mA / Pt1000 / Ni1000

• Optional LCD local display variant

Super Universal Module

TXM1.8X

8-Point Super-Universal I/O Module

The most flexible TXM1 module, supporting an extended range of signal types and complex field devices. Suitable for applications requiring maximum configurability in a compact form factor.

• 8 × super-universal points

• Extended signal type support

• Optional LCD local display variant

TX-I/O Infrastructure: Power Supply, Address Keys & Open Interface

Beyond the I/O modules themselves, a complete TX-I/O installation requires power supply infrastructure, device addressing tools, and — in many projects — integration with third-party systems through an open communication interface.

I/O Power Supply

TXS1.12F10

TX-I/O Power Supply Module — 1200 mA

Provides 24 VDC supply to TX-I/O module strands. Each TXS1.12F10 can supply up to 64 load units (1 LU = 12.5 mA), with a 10 A fuse, enabling stable and safe power distribution for large I/O assemblies.

• 24 VAC input → 24 VDC output

• 1200 mA (28.8 W) output

• Max 64 load units per strand

• IP20 / IP30 enclosure

Address Key Set

TXA1.K12

Address Keys 1–12 + Reset Key

Physical address key set covering addresses 1 through 12, plus a reset key — used during commissioning to assign unique hardware addresses to TX-I/O modules on the bus.

• Keys for addresses 1–12

• Includes reset key

• For TX-I/O bus commissioning

Address Key Set

TXA1.K24

Address Keys 13–24 + Reset Key

Extends the addressing range to modules 13–24, used alongside TXA1.K12 for larger installations with more than 12 TX-I/O modules on a single bus strand.

• Keys for addresses 13–24

• Includes reset key

• For larger TX-I/O assemblies

Open Interface Module

TXI2.OPEN

TX-I/O Open Interface Module

Enables integration of the TX-I/O system with third-party automation platforms that support open communication protocols. Bridges Desigo TX-I/O modules to non-Siemens controllers and SCADA systems.

• Open protocol integration

• Third-party controller support

• Expands TX-I/O ecosystem flexibility

Field Sensors: Temperature, Humidity & Pressure

Reliable, accurate sensing is the foundation of effective building automation. A controller can only perform as well as the data it receives. Siemens' Q-series and standard sensor range covers every common measurement parameter in HVAC and BAS applications.

Outdoor Temp Sensor

QAC2012

Outdoor Air Temperature Sensor — Pt1000

A precision PT1000 outdoor temperature sensor with ±0.3°C tolerance, designed for weather-compensated heating and cooling control. Robust housing rated to +70°C operating temperature.

• Pt1000 resistive output

• Accuracy: ±0.3°C

• Max operating temp: +70°C

• Weather-compensated control

Immersion Temp Sensor

QAE2112.015

Pipe / Immersion Temperature Sensor — Pt1000

A Pt1000 pipe immersion sensor with a 150mm stem for measuring water temperature in heating, cooling, and district energy pipework. Standard choice for boiler, chiller, and heat exchanger monitoring.

• Pt1000 output

• 150 mm immersion stem

• Heating & chilled water circuits

• Compatible with all PXC controllers

Differential Pressure

QBM81-5

Duct Differential Pressure Switch — 50–500 Pa

A duct-mounted differential pressure switch measuring 50–500 Pa, used to monitor filter states, fan operation, and airflow confirmation in air handling units and ventilation ducts.

• Range: 50–500 Pa

• Switching output

• Filter & fan monitoring

• Duct installation

Duct Humidity + Temp

QFM3160

Duct Relative Humidity & Temperature Sensor — 0–10 V

A high-accuracy duct combination sensor measuring both RH (0–100%) and temperature. Outputs 0–10 VDC signals for each parameter, with ±2% RH accuracy and ±0.6 K temperature accuracy at 15–35°C.

• RH: 0–100% / Temp: 0–50°C

• Dual 0–10 VDC output

• Accuracy: ±2% RH / ±0.6 K

• For AHUs and ventilation ducts

Air Quality & Damper Control: GMA326.1E

In ventilation systems, controlling airflow — through dampers, VAV boxes, and fresh air intakes — is critical for both energy efficiency and indoor air quality. The GMA326.1E is a Siemens OpenAir™ damper actuator designed for precise, reliable damper positioning in HVAC duct systems.

Damper Actuator

GMA326.1E

OpenAir™ Rotary Damper Actuator

A rotary actuator from the Siemens OpenAir™ series, designed for modulating and on/off control of air dampers in ventilation systems. Delivers reliable torque and precise positioning, compatible with standard 10mm shafts and spring return operation.

• OpenAir™ rotary series

• Modulating / on-off control

• Spring return fail-safe option

• For ventilation dampers & VAV

Quick Reference: All Products at a Glance

The following table provides a rapid reference for all Siemens building automation products available through Neva Building Solutions, including their function, primary application, and communication / output interface.

Neva Building Solutions: Our Served Markets

Neva Building Solutions operates as a specialist distributor and technical partner for Siemens building automation products, with deep market knowledge and logistics networks covering five major regions. Our clients include MEP contractors, systems integrators, facility management companies, and public sector project owners.

Model	Category	Primary Function	Interface / Output
GMA326.1E	Damper Actuator	Rotary damper/VAV control	Modulating / On-Off
PXC7.E400M	Automation Controller	BAS automation station + system controller	BACnet/IP, BACnet/SC, Modbus, KNX
PXM30.E	Touch Panel HMI	7" operator interface for Desigo BAS	BACnet/IP, Web server, PoE
QAC2012	Temperature Sensor	Outdoor air temperature measurement	Pt1000 resistance
QAE2112.015	Temperature Sensor	Pipe/immersion water temperature	Pt1000 resistance
QBM81-5	Differential Pressure	Duct pressure switch 50–500 Pa	On/Off switch
QFM3160	Humidity + Temp Sensor	Duct RH & temperature measurement	0–10 VDC (dual output)
TXA1.K12	Address Keys	TX-I/O module addressing (1–12)	Physical key set
TXA1.K24	Address Keys	TX-I/O module addressing (13–24)	Physical key set
TXI2.OPEN	Interface Module	Open-protocol TX-I/O integration	Open / third-party protocol
TXM1.16D	Digital Input Module	16× DI for status/fault monitoring	Potential-free contacts
TXM1.6R	Relay Output Module	6× relay for on/off load switching	Relay contacts
TXM1.8U	Universal I/O Module	8× configurable AI/AO/DI/DO	0–10 V / 4–20 mA / Pt1000
TXM1.8X	Super-Universal I/O	8× extended-range universal I/O	Extended signal types
TXS1.12F10	I/O Power Supply	24 VDC supply for TX-I/O strand	24 VAC input / 1200 mA DC