Description
Introduction
The KNX IO 411.1 secure from WEINZIERL is a compact KNX binary input designed for installations that need reliable integration of conventional push buttons, dry contacts and pulse-based signals into a KNX system. With four inputs in a DIN rail mounted housing only 1 module wide, it is well suited for distribution boards where panel space is limited.

The device is part of the KNX system components range and is especially relevant for system integrators and installers who need flexible input processing with secure KNX communication. More WEINZIERL devices can also be found in the WEINZIERL product selection.
Key Features
- Compact KNX binary input with 4 inputs.
- Inputs can be controlled via dry contacts.
- Suitable for connecting conventional push buttons.
- Application functions for switching, dimming, shutter, valuator, scene and color control.
- Operation time and impulse counter functions.
- Can be used to connect energy meters with S0 output or anemometers.
- 16 independent logic or time functions.
- Supports KNX Data Security.
- Two push buttons and three LEDs for local operation and visualization of the device state.
- DIN rail mounted device with 1 module width.
Benefits
For professional KNX projects, the value of this device is its combination of compact form factor, flexible application functionality and secure communication support. The four dry-contact inputs allow conventional field devices to be brought into the KNX installation without using larger multi-purpose modules where they are not required.
The application is broad enough for common room and building control tasks, including switching, dimming, shutters, scenes and color control. In addition, the operation time and impulse counter functions make the device useful where pulses or operating durations need to be processed within the KNX project.
Local push buttons and LEDs simplify commissioning and service work by providing direct operation and device-state visualization at the distribution board.
Technical Specifications
Applications
The device is intended for KNX projects where conventional contacts or push buttons must be integrated into bus control functions. Typical uses include room control inputs, switching commands, dimming control, shutter operation, scene triggering and color control commands.
Because the application also includes operation time and impulse counter functions, it can be used for pulse-related applications such as connecting energy meters with S0 output or anemometers, provided the signal does not exceed the stated limit.
Installation Notes
The device is designed for DIN rail mounting and occupies 1 module, equal to 18 mm. Binary input channels 1 and 2 are connected via a pluggable 3-pole screw connector, and channels 3 and 4 are connected via a second pluggable 3-pole screw connector.
The inputs are controlled via dry contacts. The signal shall not exceed 100 ticks per second. A KNX programming button with red LED is provided, while two push buttons and three LEDs support local operation and visualization of the device state during commissioning and service.
FAQ
How many inputs does the KNX IO 411.1 secure provide?
It provides 4 binary inputs.
Can the inputs be used with conventional push buttons?
Yes. The inputs can be controlled via dry contacts and are suitable for connecting conventional push buttons.
Does this device support KNX Data Security?
Yes. The device supports KNX Data Security.
What functions are available in the application?
The application offers functions for switching, dimming, shutter, valuator, scene and color control, as well as operation time and impulse counter functions.
Can it be used with energy meters or anemometers?
Yes. The impulse counter function can be used to connect energy meters with S0 output or anemometers.
What is the maximum signal rate?
The signal shall not exceed 100 ticks per second.
Conclusion
The WEINZIERL KNX IO 411.1 secure is a compact and capable 4-input KNX binary input for dry-contact integration, local control, pulse counting and secure KNX communication. Its 1-module DIN rail format makes it a practical choice for professional KNX panels where space efficiency and functional flexibility are both important. Manufacturer information is available on the official WEINZIERL product page.






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