MDT SCN-SAFE.01 KNX Safety Module, 2 TE DIN Rail, 4 Safety Inputs, 2 Safety Outputs, SIL 3/PL e

In industrial and building automation environments where safety functions must be integrated into a KNX system, the MDT SCN-SAFE.01 Safety Module provides a compact solution. It is designed for installation on a DIN rail (REG) and occupies 2 TE (36 mm) of space in the distribution board. The module connects to the KNX bus and offers 4 potential-free safety inputs and 2 potential-free relay outputs. The inputs can be configured as 1- or 2-channel, and the module supports safety functions up to SIL 3 according to IEC 61508 and PL e according to ISO 13849-1. Configuration is done via ETS software.

Key specifications

• Product type: KNX Safety Module
• Bus system: KNX
• Mounting: DIN rail (REG), 2 TE (36 mm)
• Safety inputs: 4 (potential-free, configurable as 1- or 2-channel)
• Safety outputs: 2 (potential-free relay outputs, normally open)
• Safety integrity level: up to SIL 3 (IEC 61508)
• Performance level: up to PL e (ISO 13849-1)
• Input monitoring: short circuit, wire break
• Output switching capacity: max. 6 A (AC1) / 2 A (DC13) per output
• Power supply: KNX bus (21-30 V DC)
• Current consumption: approx. 10 mA from KNX bus
• Operating temperature: 0 °C to +45 °C
• Protection class: IP20

Why choose it

The MDT SCN-SAFE.01 integrates safety functions directly into the KNX bus system, eliminating the need for separate safety relays. Its compact 2 TE width saves space in the distribution board. With support for SIL 3 and PL e, it is suitable for demanding safety applications. The module can handle emergency stop functions, logic operations, time functions, and diagnostics, all configurable via ETS.

Ideal use cases

• Emergency stop circuits in building automation
• Safety monitoring of doors, gates, or light curtains
• Integration of safety functions into KNX-based control systems
• Machinery safety applications requiring SIL 3 or PL e

Good to know

The module is certified by TÜV Rheinland for safety functions. It operates from the KNX bus voltage and does not require an external power supply. The relay outputs are normally open and can switch up to 6 A at AC1. Configuration is done using the ETS software, which is standard for KNX installations.