WEINZIERL KNX Modbus RTU Gateway 886.1 secure

Description

Introduction

The WEINZIERL KNX Modbus RTU Gateway 886.1 secure (Art.-Nr. 5498) serves as a compact bridge between KNX TP and Modbus RTU protocols over RS-485. Occupying just 1 DIN module width (18mm), this gateway is powered directly from the KNX bus and requires no additional auxiliary power supply, simplifying electrical panel layouts and installation for system integrators. This device is part of our professional KNX Gateway range.

Featuring full support for KNX Security and ETS 5 / ETS 6 compatibility, the gateway enables parameter mapping between KNX objects and Modbus registers directly within the ETS environment using a Dedicated Configuration Tool (DCA). It can act as either a Modbus Master or Slave, managing up to 25 slave devices in master mode across 250 freely configurable channels.

Key Features

• Compact DIN-rail enclosure with a width of 1 module (18 mm).
• Bus power supply directly via KNX TP without auxiliary voltage.
• 250 freely configurable channels for mapping KNX communication objects to Modbus registers.
• Modbus Master or Slave operation over an RS-485 interface.
• Addresses up to 25 Modbus slave devices when configured in Master mode.
• Local diagnostics featuring two push buttons and three status LEDs.
• Galvanic isolation provided between the KNX bus and Modbus connections.
• Fully integrated parameterization using the Weinzierl DCA tool for ETS 5 and ETS 6.

Benefits

• Simplified Bus-Powered Architecture: Operates directly on power from the KNX TP bus, eliminating the need for an external auxiliary power supply.
• High Configuration Density: Features 250 freely configurable channels in a compact 18mm (1 module) DIN-rail housing.
• Enhanced Security Standards: Built-in support for KNX Security guarantees encrypted and secure bus communication across commercial and residential networks.
• Flexible Operational Modes: Operates as a Modbus Master supporting up to 25 slave devices or as a Slave, facilitating integration with HVAC units, energy meters, wallboxes, and heat pumps.
• Galvanic Isolation: Built with galvanic isolation between the KNX bus and Modbus RS-485 lines to protect system hardware and avoid ground loops.
• Direct ETS Testing without Downloads: Permits direct control and commissioning tests through ETS 5 and ETS 6 without requiring an additional USB RS-485 interface.

Technical Specifications

Specification	Value
Manufacturer	Description
Eltako	Modbus bidirectional three-phase meter
ABB	Energy meter
ComAp	Single gen-set controller
D+H	Window drive
Elsner	Weather station
Fronius	Hybrid inverter
Heliotherm	Remote control gateway
Huawai	Hybrid inverter
Mitsubishi Electric	Air-water heat pump control
Schneider Electric	Energy meter
Systemair	AC controller
Truebner	Soil moisture sensor
Vallox	Ventilation unit
Weider Wärmepumpen	Heat pump controller
Broetje	Control and communication module
Eletechsup	Relais module
Emec	Multichannel dosing controller
Finder	Multi-function Bi-directional energy meter
E+E	Temperature and humidity sensor
Rehau	Room temperature controller
—	Temperature and humidity sensor
Heidelberg	Wallbox
Mennekes	Wallbox / Charging station

Applications

Energy Monitoring & Management: Integrates third-party energy meters from manufacturers such as ABB, Schneider Electric, Finder, and Eltako into the KNX network for detailed power analytics. Explore more WEINZIERL building automation products for professional building automation projects.

HVAC & Building Automation: Connects heat pump controllers, air conditioning units, and ventilation modules from brands like Mitsubishi Electric, Systemair, Vallox, Fronius, and Heliotherm directly to central KNX controls.

Installation Notes

• Mount the gateway on a standard 35 mm DIN rail inside an enclosure, occupying 1 module width (18 mm). Connect the KNX TP bus cable to the standard bus terminal.
• Wire the RS-485 Modbus RTU communication line to the designated terminals while observing correct polarity. Built-in galvanic isolation protects against electrical interference between the KNX bus and Modbus networks.

Developer Resources

• ETS Product Database for ETS 5 and ETS 6
• Weinzierl DCA Modbus RTU 886.1 secure Gateway Config Tool and Manual
• Official Data Sheet and User Manual
• CE Declaration of Conformity and 3D CAD Download Models

FAQ

Does the WEINZIERL KNX Modbus RTU Gateway 886.1 secure require an external power supply?

No, the gateway is powered entirely by the KNX TP bus and does not require any additional auxiliary power. For certificates and current technical files, refer to the official product documentation.

How many Modbus devices can be connected in Master mode?

In Modbus Master mode, the gateway can address up to 25 Modbus slave devices using its 250 freely configurable channels.

Is an additional external software tool needed for setup?

No separate external software is needed. Configuration and register assignment are performed directly in ETS 5 or ETS 6 via the Weinzierl DCA config tool.

Does this gateway support secure KNX protocols?

Yes, the WEINZIERL 886.1 secure supports KNX Security for secure system integration.

What is the exact product model?

The order/model code for this page is KNX Modbus RTU Gateway 886.1 secure. Match it against project documents before purchase.

Who is the manufacturer?

This product is manufactured by WEINZIERL.

Conclusion

The WEINZIERL KNX Modbus RTU Gateway 886.1 secure provides a space-saving and secure solution for linking RS-485 Modbus devices with KNX networks. Featuring bus-powered operation, 250 channels, KNX Security, and seamless ETS DCA integration, it simplifies commissioning and ensures reliable protocol translation. Installers and system integrators can review our KNX dealer program options.