Honeywell
American building controls — Niagara Framework BMS and T6 room thermostats for KNX and BACnet commercial integration.
Honeywell Building Technologies (a division of Honeywell International, formerly Honeywell Building Controls) manufactures room thermostats, DDC controllers, the Niagara Framework BMS platform, fire alarm panels through its NOTIFIER subsidiary, and commercial HVAC controls including valve actuators and AHU DDC. In European KNX projects, Honeywell equipment appears at two distinct levels: at the room level (T6H Pro BACnet room thermostat on fan coil units, alongside KNX room controllers for lighting) and at the building management level (Niagara N4 JACE 8000 aggregating HVAC, BACnet, Modbus data — KNX integrators interface with Niagara rather than replacing it). Honeywell is the dominant BMS platform vendor in European commercial buildings — virtually every large office block runs a Niagara JACE.
Role in our panels
How we use Honeywell
The Niagara Framework (Tridium, a Honeywell company) is the market-leading BMS software platform: JACE 8000 field controllers aggregate HVAC, fire, access control and energy data from BACnet, Modbus, LON and KNX sources into a unified Niagara Workbench dashboard. KNX integrators working in commercial projects will almost always encounter an existing Niagara JACE — the correct approach is to interface KNX with Niagara via a KNXnet/IP driver rather than install a parallel visualisation. At room level, T6H Pro BACnet MS/TP thermostats control fan coil units independently of the KNX room controller — the KNX room controller handles lighting and blind control while the T6H handles HVAC. The NOTIFIER ID3000 addressable fire panel (EN 54-2 certified, Honeywell subsidiary) is the most common fire alarm platform in European commercial buildings — its volt-free relay outputs interface with KNX binary input modules for fire cause-and-effect actions.
KNX panel design with Honeywell equipment: T6H BACnet thermostat uses RS-485 BACnet MS/TP — wire from T6H to Niagara JACE 8000 on RS-485 bus (120 ohm termination at both ends). Niagara JACE runs KNX driver (from KNX Association Niagara module) that exposes KNX group addresses as Niagara points — setpoint from KNX thermostat widget writes to T6H over BACnet via Niagara. For VK2 control valve: 24V AC supply from panel transformer (separate circuit from KNX 29V SELV bus), 0-10V control signal from KNX analog output module (MDT 07B8.02) to valve actuator Y terminal. NOTIFIER ID3000: volt-free relay output from fire panel (alarm, zone, fault relays) wired through optocoupler isolator to KNX binary input module (MDT STC-0416.02) — never connect fire panel relay directly to KNX input without galvanic isolation.
Used in these project types
Honeywell products
Key components we install
Honeywell T6H Pro Room Thermostat (BACnet MS/TP)
BACnet MS/TP commercial room thermostat for fan coil unit control. 3-speed fan control output, modulating valve signal (0-10V or 2-10V), setpoint range 10-30°C, optional RH sensor. RS-485 BACnet MS/TP daisy-chain to Niagara JACE — up to 127 devices per RS-485 segment. KNX integration path: T6H on BACnet bus → Niagara JACE reads all T6H setpoints and room temps → Niagara KNX driver writes room temperature to KNX group address for visualisation. Wall-mount backplate with concealed wiring.
Honeywell T6 Lyric Smart Thermostat
Consumer smart thermostat with OpenTherm and 24V Rh/Rc conventional wiring. Wi-Fi connectivity for cloud control. Bridged to KNX via Home Assistant integration: HA reads T6 Lyric setpoint and room temp via cloud API → HA writes setpoint changes from KNX schedule to T6 Lyric. Use case: residential upgrade — replacing old thermostat with T6 Lyric while adding KNX room controller for lights; schedules unified in KNX but Lyric remains HVAC controller.
Honeywell Niagara N4 JACE 8000
Field BMS controller running Niagara Framework N4 with 2000-point capacity. Native protocols: BACnet IP, BACnet MS/TP, Modbus TCP, Modbus RTU, LON. KNX driver (KNX Association certified Niagara module) adds KNXnet/IP support — JACE reads and writes KNX group addresses. Four RS-485 ports, two Ethernet ports. Typical deployment: JACE per floor aggregating all BACnet FCU controllers, KNX group addresses for lighting power, and Modbus energy meters — unified in Niagara Workbench dashboard for building manager.
Honeywell VK2 Control Valve (DN15-40)
2-way PN16 control valve for heating and cooling coils in AHU and FCU applications. DN15 to DN40, Kvs 0.25 to 25 m3/h, spring-return to closed (fail-safe). 24V AC/DC actuator with 0-10V or on/off control input. For KNX AHU control: KNX analog output module (0-10V) drives VK2 actuator position. 24V AC supply from panel transformer (unswitched — actuator must always be powered to hold spring-return position). Common on fan coil units in hotel and office HVAC systems.
NOTIFIER ID3000 Addressable Fire Panel
Addressable fire alarm panel, EN 54-2 and EN 54-4 certified. Up to 127 devices per SLC loop (detectors, call points, sounders). Volt-free relay outputs: alarm relay (common alarm), zone relays (per detection zone), fault relay. KNX integration: alarm relay and zone relays wired to KNX binary input module (MDT STC-0416.02) via optocoupler isolator — KNX group objects trigger cause-and-effect: staircase lights on, lifts to ground floor, HVAC smoke dampers close (via KNX analog output to Belimo actuators). Must use EN 54-certified cabling on fire panel side.
Honeywell FAQ
How does Niagara Framework connect to KNX?
The Niagara N4 JACE 8000 supports the KNX driver developed by the KNX Association (available from Tridium marketplace). Once installed, the JACE connects to the KNX installation via KNXnet/IP — either directly to a KNX IP router or to an IP-enabled line coupler. Niagara Workbench then lists all KNX group addresses as configurable points: the integrator maps each KNX group address to a Niagara point with the correct DPT. Commercial projects: Niagara manages HVAC (AHU setpoints, FCU fan speed, VRF mode) while KNX manages room lighting and blinds — both appear unified in the Niagara graphics. KNX setpoint changes from a KNX room panel are reflected in Niagara in real time.
Can Honeywell T6H thermostats output 0-10V for KNX analog input?
The T6H Pro can output a 0-10V signal (or 2-10V) for proportional fan coil valve or damper control — this is readable by a KNX analog input module. However, this is unidirectional: the T6H outputs based on its own room sensor and setpoint, with no way to override the setpoint from KNX via the 0-10V wire. For bidirectional control (KNX writing a setpoint to the T6H), BACnet MS/TP is the correct path: Niagara JACE reads the KNX group address for setpoint (written by KNX room panel or schedule) and writes it to the T6H over BACnet. This requires the Niagara KNX driver and a JACE on the network.
What Honeywell products are relevant for fire and KNX integration?
The NOTIFIER ID3000 addressable fire panel provides EN 54-2 certified volt-free relay outputs for alarm, zone and fault signals. These relay outputs wire to KNX binary input modules (MDT STC-0416.02 recommended — opto-isolated inputs for safety system interfacing). KNX cause-and-effect programming in ETS6: alarm input group object triggers KNX actions — staircase lights maximum brightness (KNX dimmer), blinds to up position (KNX blind actuator), lift call to ground floor (KNX relay to lift controller), HVAC smoke dampers closed (KNX analog output 0V to Belimo damper actuators). All KNX cause-and-effect logic must be reviewed by a fire engineer and tested to EN 54-14 as part of the overall fire system commissioning.
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