EnOcean and DALI to Modbus TCP, KNX and MQTT
Looking for a gateway from EnOcean or DALI to Ethernet? This overview shows which device performs which conversion – EnOcean to Modbus TCP, KNX and MQTT, DALI to Modbus TCP – with capacities, typical set-ups and a planning checklist.
Which device converts what
The overviewOne conversion per row: where the data comes from, where it goes and which device sits in between. Rows can be combined – one gateway can, for example, deliver Modbus TCP to the building management system and MQTT to analytics at the same time.
| From | To | Device | Good to know |
|---|---|---|---|
| EnOcean radio | Modbus TCP | VL-700 BASE 2 (order no. 12918) | Readings as registers for PLC and building management; the register map is defined and documented in the project. |
| EnOcean radio | MQTT (JSON) | VL-700 BASE 2 | One JSON object per telegram, readings with units, up to four brokers in parallel, optionally via TLS. |
| EnOcean radio | KNX TP | VL-700 BASE 2 with KNX module VL-STYLE-KNX-TP (order no. 10926) | Send and receive data on any group addresses; the module plugs into the back of the gateway. |
| EnOcean radio | BACnet/IP, BACnet/SC | VL-700 BASE 2 | In preparation, not yet part of the scope of delivery. DEUTA Controls is registered as a BACnet vendor (Vendor ID 1676). |
| DALI | Modbus TCP | AL-511-00 IP-DALI-Bridge (order no. 11991) | DALI master with Ethernet port; one AL-520-00 bus power supply per DALI line, up to 64 control gear per line. |
| EnOcean radio | DALI, without gateway | BL-204-10-868 EVG FLEX | Radio push buttons and sensors taught in directly, up to 15 DALI control gear, bus power supply (30 mA) built in. |
“Gateway to TCP/IP” – what it means
Network and languageTCP/IP is the network, not the language. If you are looking for an EnOcean or DALI converter “to TCP/IP”, you therefore need to decide which protocol will run over the network. That choice determines which device fits and what the target system has to support.
Modbus TCP is the choice for PLCs and many building management systems: supported almost everywhere, easy to check, but without built-in meaning for the values. MQTT suits analytics, dashboards and the cloud. BACnet/IP is the language of building management. KNX connects room automation; if the KNX installation is networked over IP, a KNX IP router links the TP line to the network as usual.
The VL-700 BASE 2 speaks Modbus TCP and MQTT over Ethernet, and KNX TP via the plug-in module. The AL-511-00 IP-DALI-Bridge speaks Modbus TCP.
Four typical set-ups
In practiceThese are the most common installations. The building blocks are the same; only the target changes.
What the integrator needs for Modbus TCP
Before commissioningModbus TCP only knows registers – numbers at an address. Their meaning is in a list alongside. So that the integrator can plan their part before commissioning, the following should be fixed:
- IP address of each device and the network segments it sits in.
- Register list per data point: address, data type, scaling and unit.
- Assignment to the room or luminaire, with a unique name.
- Polling cycle: how often the PLC reads and writes.
- Who maintains the list when sensors or luminaires are added.
DALI over Ethernet: splitting the lines
For lighting designA DALI line needs a bus voltage of typically 16 V. The AL-511-00 IP-DALI-Bridge is a DALI master without its own power supply, so every line gets an AL-520-00 bus power supply.
| Item | Value |
|---|---|
| Control gear per line | up to 64 (ballasts or LED drivers with DALI) |
| AL-520-00 bus power supply | typically 16 V DC, up to 240 mA, one supply per line |
| Current demand | up to 2 mA per control gear, so at most 128 mA for 64 devices |
| Bridge supply | 24 V DC, Ethernet 10/100 Mbit/s, DIN rail, 2 modules wide |
| More than one line | one additional bridge with power supply per line |
| EnOcean DALI controllers | the BL-204 has a 30 mA supply built in – no additional AL-520-00 on the same line |
Checklist for tender and planning
6 points- Name source and target: EnOcean sensors, DALI luminaires and the target system with manufacturer and version.
- Specify the protocol instead of “TCP/IP”: Modbus TCP, MQTT, KNX or BACnet – both if two paths run in parallel.
- Clarify quantities: sensors (up to 500 per gateway), receivers (up to 32 per gateway), DALI lines (up to 64 devices, one supply per line).
- Require the register, object or group address list as a deliverable.
- Separate networks: field network and management network apart, firewall in between – the VL-700 BASE 2 has two Ethernet ports for this.
- Plan radio coverage: number of receivers per floor from floor plan and construction.
Frequently asked questions
7 questionsCan I connect EnOcean sensors directly to Modbus TCP?
Yes, via the VL-700 BASE 2. It receives the radio telegrams through EnoDisc® receivers, decodes the device profiles and provides the readings as Modbus TCP registers.
Is there a converter from DALI to Modbus TCP?
Yes, the AL-511-00 IP-DALI-Bridge. It is a DALI master with an Ethernet port and is addressed via Modbus TCP. Each DALI line needs an AL-520-00 bus power supply.
How many DALI devices does one bridge control?
Up to 64 control gear per DALI line. For larger installations, use one additional bridge with power supply per line.
How do EnOcean values get into KNX?
With the VL-STYLE-KNX-TP KNX module, which plugs into the back of the VL-700 BASE 2. The gateway then sends and receives data on any group addresses via KNX TP.
Does the gateway support BACnet?
A BACnet interface for the VL-700 BASE 2 is in preparation, as BACnet/IP or BACnet Secure Connect. It is not yet part of the scope of delivery; today the values go out via Modbus TCP, MQTT or KNX.
Can I use several paths at the same time?
Yes. Control often runs via Modbus TCP or KNX into the existing building automation, while dashboards and analytics receive the values via MQTT.
Are there licence fees per sensor?
No. There is no fee per sensor and no recurring cost.
New planning aids by email
New devices, firmware and software releases, application examples and planning aids – roughly every two months, at most once a month.
Subscribe to the newsletterInformation as of 13 November 2026. The data sheets and manuals of the devices in their current version are authoritative.
Which conversion does your project need?
Send us your floor plan, sensor or luminaire list and the target system. You will receive a device list with order numbers and a quote.