QMX6.P34 - Siemens, Room operator unit KNX with temperature sensor, white

The Siemens QMX6.P34 is a wall-mount KNX room operator unit combining a precision NTC temperature sensor with a full LCD touch display for direct HVAC control and setpoint adjustment. Part of the QMX6 product family, it operates across three building automation ecosystems: Desigo (PL-Link), KNX S-Mode, and Synco (LTE-Mode).

Built for commercial and building services HVAC applications, the QMX6.P34 is suitable for offices, hotel rooms, and other occupied spaces where occupant comfort control and energy efficiency are both priorities. The Green Leaf function provides real-time feedback on whether the setpoint is within the configured energy-efficient range, helping building managers reduce unnecessary heating and cooling.

Key features:

• LCD touch display with setpoint adjustment, room operating mode selection, and fan control
• Integrated NTC temperature sensor; measuring range 0–50 °C, accuracy ±0.2 K at 20–25 °C
• Green Leaf function for energy-efficient setpoint guidance
• Five room operating modes: Auto, Comfort, Pre-comfort (Standby), Economy, Protection
• Compatible with Siemens Desigo (PL-Link via ABT), KNX S-Mode (via ETS), and Synco (LTE-Mode via ACS)
• In KNX S-Mode: acts as a standalone temperature controller for radiators, floor heating, and radiant chilled/heated ceilings
• Manager/subordinate operation for multi-unit room installations
• KNX bus powered: DC 24 V, max 7.5 mA, max 0.18 W
• IP30, housing in white (similar to RAL 9010)
• Dimensions: 88 × 120.8 × 18 mm; weight: 118.4 g

In the Desigo ecosystem (PL-Link) as a peripheral room device:

• Variable Air Volume (VAV)
• Fan Coil Unit (FCU)
• Radiant heated/chilled ceiling
• Radiator
• Heat pump
• Dual duct
• Air Handling Unit (AHU)  when paired with the PXC4/5/7 primary automation station

In the KNX ecosystem (S-Mode)  as a standalone controller:

• Radiator heating (2-pipe, on/off or PWM)
• Radiant ceiling heating and cooling
• Floor heating/cooling
• 2-pipe water systems (single and 2-stage, with or without changeover)
• 4-pipe water systems (single and 2-stage, separate heating and cooling circuits)

In the Synco ecosystem (LTE-Mode) as a peripheral room device:

• Fan Coil Unit (FCU) paired with RDG2.0KN/RDG2.4KN room thermostat
• Air Handling Unit (AHU) paired with Synco 700 RMU7.0B-1 controller
• Heating circuit paired with Synco 700 RMH760B-1 controller

Compatible Siemens KNX actuators

The QMX6.P34 is designed to work alongside Siemens KNX electromotoric valve actuators (e.g. SSA118.09HKN) to control water-based HVAC equipment in 2-pipe and 4-pipe systems.

For rooms requiring humidity or CO₂ sensing, consider the QMX6.P40 (with humidity sensor), QMX6.P44 (humidity + display), QMX6.P70 (humidity + CO₂), or QMX6.P74 (humidity + CO₂ + display).