MDT Binary Input – Precise status monitoring for modern KNX systems
The MDT binary input enables the reliable detection and processing of state changes in KNX building automation systems . With variants for 4, 8, 16 or 32 inputs and support for potential-free contacts as well as voltages of 12–24V AC/DC or 230V AC, it offers maximum flexibility for applications such as window monitoring, lighting control or energy management.
Key features
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Versatile options:
- Available in 4-, 8-, 16- or 32-fold versions.
- Compatible with potential-free contacts and voltage inputs (12–24V AC/DC or 230V AC).
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Innovative features:
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Multi-tap function: Up to four values or DPTs can be transferred per input.
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Group control: Support for long and extra-long key presses.
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Four integrated logic modules: Ideal for creating status messages such as "all windows closed".
- Support for dimmer, blind and pulse counter functions .
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Individual parameterization:
- Fine-tuning of debounce times, thresholds and telegram rate limits.
- Configurable scene control and blocking objects per input.
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Safe and robust: Galvanically isolated inputs ensure maximum operational reliability and protection of the KNX bus.
Technical details
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Entrances:
- Voltage ranges: 12–24V AC/DC, 230V AC or potential-free contacts (with internal 12V query voltage).
- Maximum cable length: up to 100 m.
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Power consumption: Typically < 0.3 W – supplied directly via the KNX bus.
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Operating environment:
- Temperature range: 0 to +45 °C.
- Protection class: IP20 – suitable for dry indoor areas.
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Dimensions: DIN rail mounting device (2 modules to 12 modules, depending on the model).
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KNX compatibility: TP-256 interface, fully ETS5 compatible.
Application areas
- Monitoring of door and window contacts for increased security and energy efficiency.
- Integration of conventional push buttons and switches into KNX scenes.
- Control of lighting, blinds and heating valves.
- Energy monitoring and consumption recording via pulse counters (e.g. Eltako DSZ).
Easy installation and configuration
- Direct DIN rail mounting (REG) for quick installation.
- Intuitive configuration via ETS5 with extensive setting options.
- No separate power supply is required – operation is carried out entirely via the KNX bus.
Product information
Manufacturer part number: BE-04230.02
Article number: SMH0257
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