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Kitchen hood demand ventilation controller (exhaust and make-up air fans) · BACnet points list
Melink Intelli-Hood IH4 System Controller BACnet points list
Updated 28 October 2026
The Intelli-Hood IH4 System Controller runs kitchen exhaust and make-up air fan VFDs from hood temperature and smoke (optic) sensors. On BACnet IP it is the main device and a virtual router: each exhaust fan, auxiliary airflow, hood controller and virtual I/O module shows up as its own device behind it. The System Controller device itself only reports the state of its physical I/O, all read-only.
This page lists 20 BACnet objects for the Melink Intelli-Hood IH4 System Controller — 0 of them writable — with each object’s type, instance number, name, engineering units and access. It is re-typed from Melink’s own free documentation, linked below.
- Manufacturer
- Melink
- Model
- Intelli-Hood IH4 System Controller
- Equipment
- Kitchen hood demand ventilation controller (exhaust and make-up air fans)
- Equipment type
- Rooftop units, AHUs & DOAS
- BACnet objects
- 20 (0 writable)
- Transport
- BACnet IP, BACnet IPv6
- Firmware
- Application 4.0, firmware 1.0.0
- Default device instance
- 654000
- Also known as
- Intelli-Hood, IH4, IH4-SC, Melink IH4, Intelli-Hood 4
BMS integration notes: Melink Intelli-Hood IH4 System Controller
Discover the System Controller (default Device ID 654000), then discover the fan and hood devices through its virtual router. The System Controller only gives the state of its physical inputs and outputs. Map the outputs configured as Fan On or System Fault, and the inputs wired for remote on/off or enable.
Minimum points to map
The short list most integrators start with — enough to run the unit from a BMS. Map more as the job needs.
| Object | Name | Why | Access |
|---|---|---|---|
| BV 0 | Digital Input 1 Status | Physical input 1; function set in IH4 config | Read |
| BV 1 | Digital Input 2 Status | Physical input 2; function set in IH4 config | Read |
| BV 4 | Digital Output 1 Status | Relay 1; e.g. Fan On or System Fault per config | Read |
| BV 5 | Digital Output 2 Status | Relay 2; function set in IH4 config | Read |
| BV 6 | Digital Output 3 Status | Relay 3; function set in IH4 config | Read |
| BV 7 | Digital Output 4 Status | Relay 4; function set in IH4 config | Read |
| AV 0 | Analog Input 1 Status | Analog input value, 0-100 % | Read |
| AV 4 | Analog Output 1 Status | Analog output to auxiliary airflows, 0-100 % | Read |
Enable & remote start
No BACnet enable or start/stop object on this device. Fans are started from the Touchpad, schedules or digital inputs (physical, or the Virtual Input Module over BACnet).
Heartbeat & communication loss
The BACnet Watchdog (0-600 s, default 300 s, 0 = off) is set on the System Controller. It resets the Virtual Input Module inputs when no BACnet traffic addressed to the Intelli-Hood arrives in time; it does not affect this device's objects.
Network setup
- The System Controller is the main BACnet IP device (default Device ID 654000) and a virtual router (default DNET 654) for the fan, hood controller and virtual module devices; UDP port 47808.
- With BACnet Auto Number on (default), the virtual devices are numbered from 654001: exhaust fans and auxiliary airflows (sorted by name), then hood controllers, virtual output modules, virtual input modules.
- IP defaults to DHCP. BACnet runs on IPv4 or IPv6, not both; for IPv6 set IP Type to 'IPv4 & IPv6' and BACnet IP Type to IPv6 (multicast scope default ff05).
- Settings are on the Touchpad (System Controller configuration) or the web configurator at http://<controller IP>/ih4-configurator.
- Set the clock from the BMS with UTC TimeSynchronization (about once a day) if NTP is not reachable; the time zone is a separate setting.
Watch out for
- Front ends that send Who-Is without routing only find the System Controller; run a network/router discovery, select the router with the Intelli-Hood DNET, then discover devices again.
- The DNET must be unique; another router or BBMD using 654 breaks access to the virtual devices.
- All objects here are read-only status; the BMS cannot command fans from the System Controller device.
Melink Intelli-Hood IH4 System Controller BACnet objects
Type: AI, AO, AV, BI, BO, BV, MI/MO/MV (multi-state) · Access: Read read-only, Write writable, Command writable with a priority array.
| Description | States | |||||
|---|---|---|---|---|---|---|
| BVmin | 0 | Digital Input 1 Status | Physical digital input 1 on the System Controller | Read | Inactive = Open, Active = Closed | |
| BVmin | 1 | Digital Input 2 Status | Physical digital input 2 on the System Controller | Read | Inactive = Open, Active = Closed | |
| BV | 2 | Digital Input 3 Status | Physical digital input 3 on the System Controller | Read | Inactive = Open, Active = Closed | |
| BV | 3 | Digital Input 4 Status | Physical digital input 4 on the System Controller | Read | Inactive = Open, Active = Closed | |
| BVmin | 4 | Digital Output 1 Status | Dry-contact digital output 1 | Read | Inactive = De-Energized, Active = Energized | |
| BVmin | 5 | Digital Output 2 Status | Dry-contact digital output 2 | Read | Inactive = De-Energized, Active = Energized | |
| BVmin | 6 | Digital Output 3 Status | Dry-contact digital output 3 | Read | Inactive = De-Energized, Active = Energized | |
| BVmin | 7 | Digital Output 4 Status | Dry-contact digital output 4 | Read | Inactive = De-Energized, Active = Energized | |
| BV | 8 | 24VDC Out 1 Status | 24 VDC output 1 | Read | Inactive = De-Energized, Active = Energized | |
| BV | 9 | 24VDC Out 2 Status | 24 VDC output 2 | Read | Inactive = De-Energized, Active = Energized | |
| BV | 10 | 24VDC Out 3 Status | 24 VDC output 3 | Read | Inactive = De-Energized, Active = Energized | |
| BV | 11 | 24VDC Out 4 Status | 24 VDC output 4 | Read | Inactive = De-Energized, Active = Energized | |
| AVmin | 0 | Analog Input 1 Status | Analog input 1 value, 0-100 % | % | Read | |
| AV | 1 | Analog Input 2 Status | Analog input 2 value, 0-100 % | % | Read | |
| AV | 2 | Analog Input 3 Status | Analog input 3 value, 0-100 % | % | Read | |
| AV | 3 | Analog Input 4 Status | Analog input 4 value, 0-100 % | % | Read | |
| AVmin | 4 | Analog Output 1 Status | Analog output 1 value, 0-100 % | % | Read | |
| AV | 5 | Analog Output 2 Status | Analog output 2 value, 0-100 % | % | Read | |
| AV | 6 | Analog Output 3 Status | Analog output 3 value, 0-100 % | % | Read | |
| AV | 7 | Analog Output 4 Status | Analog output 4 value, 0-100 % | % | Read |
No points match these filters.
Integration notes
- Every object is a Binary Value or Analog Value; there are no AI/AO/BI/BO objects.
- Fan run status, speed, faults and energy are on the separate Exhaust Fan / Auxiliary Airflow devices, not here.
- What each digital input or output does is set in the Intelli-Hood configuration (e.g. Remote On/Off, Remote Enable/Disable, Fan On, System Fault, MUA Damper); the BACnet objects only show the contact state.
- The PICS object table lists four analog inputs and four analog outputs, while the description says the controller has one physical analog input and one analog output.
- Supported services: ReadProperty, ReadPropertyMultiple, WriteProperty, DeviceCommunicationControl, UTC TimeSynchronization and ReinitializeDevice; B-ASC profile, no segmentation.
Check it against the live device. A points list tells you what the controller can expose; the unit in front of you may differ by firmware or installed options. Easy BACnet scans a network for BACnet IP devices from an Android phone, reads every object on the Intelli-Hood IH4 System Controller and exports what it actually has to Excel — free. New to BACnet? Start with what a BACnet points list is and what the object types mean.
Questions about the Melink Intelli-Hood IH4 System Controller
How many BACnet points does the Melink Intelli-Hood IH4 System Controller have?
This list has 20 BACnet objects: 8 analog values, 12 binary values. The exact set on a given unit depends on its firmware, installed options and configuration.
Which Melink Intelli-Hood IH4 System Controller BACnet points are writable?
None of the listed objects are marked writable in the source documentation.
Where is the official Melink Intelli-Hood IH4 System Controller BACnet documentation?
The source is Intelli-Hood BACnet Protocol Implementation Conformance Statement (PICS), revision Revision 250723 (PICS dated 07-18-2025), published free by Melink at https://melinkcorp.com/wp-content/uploads/2021/10/IH4_BACnet_PICS.pdf.
What are the minimum BACnet points to integrate the Melink Intelli-Hood IH4 System Controller?
Start with BV 0 Digital Input 1 Status (Physical input 1; function set in IH4 config); BV 1 Digital Input 2 Status (Physical input 2; function set in IH4 config); BV 4 Digital Output 1 Status (Relay 1; e.g. Fan On or System Fault per config); BV 5 Digital Output 2 Status (Relay 2; function set in IH4 config); BV 6 Digital Output 3 Status (Relay 3; function set in IH4 config); BV 7 Digital Output 4 Status (Relay 4; function set in IH4 config); AV 0 Analog Input 1 Status (Analog input value, 0-100 %); AV 4 Analog Output 1 Status (Analog output to auxiliary airflows, 0-100 %).
How do I enable BMS control of the Melink Intelli-Hood IH4 System Controller?
No BACnet enable or start/stop object on this device. Fans are started from the Touchpad, schedules or digital inputs (physical, or the Virtual Input Module over BACnet).
Does the Melink Intelli-Hood IH4 System Controller need a BACnet heartbeat or have a communication timeout?
The BACnet Watchdog (0-600 s, default 300 s, 0 = off) is set on the System Controller. It resets the Virtual Input Module inputs when no BACnet traffic addressed to the Intelli-Hood arrives in time; it does not affect this device's objects.
How do I check these points on the real Intelli-Hood IH4 System Controller?
Scan the network with a BACnet IP browser such as Easy BACnet, open the device and compare its object list with this table. Anything missing is usually an option that isn't installed or a point that is disabled in the controller's configuration.
More Melink BACnet points lists
- Kitchen exhaust / make-up air fan VFD device (Intelli-Hood demand ventilation)
Melink Intelli-Hood IH4 Exhaust Fan / Auxiliary Airflow
Each exhaust fan and auxiliary airflow (make-up air fan) VFD run by a Melink Intelli-Hood 4 system.
Also known as: Intelli-Hood, IH4, IH4-SC, Melink IH4, Intelli-Hood 4 - Kitchen hood sensor controller (demand ventilation for exhaust and make-up air fans)
Melink Intelli-Hood IH4 Hood Controller
Each Hood Controller (temperature probes and optic smoke sensor) in a Melink Intelli-Hood 4 system.
Also known as: Intelli-Hood, IH4, IH4-SC, Melink IH4, Intelli-Hood 4 - Kitchen hood demand ventilation BMS inputs (exhaust and make-up air fans)
Melink Intelli-Hood IH4 Virtual Input Module
Virtual Input Modules of a Melink Intelli-Hood 4 system, which let a BMS drive the system over BACnet.
Also known as: Intelli-Hood, IH4, IH4-SC, Melink IH4, Intelli-Hood 4 - Kitchen hood demand ventilation status outputs (exhaust and make-up air fans)
Melink Intelli-Hood IH4 Virtual Output Module
Virtual Output Modules of a Melink Intelli-Hood 4 system, which give a BMS extra status outputs over BACnet.
Also known as: Intelli-Hood, IH4, IH4-SC, Melink IH4, Intelli-Hood 4
Source: Intelli-Hood BACnet Protocol Implementation Conformance Statement (PICS) · rev. Revision 250723 (PICS dated 07-18-2025). Object names, instances and units are reproduced as published; descriptions are our own.