MDT KNX bus power supply – Intelligent power supply with integrated diagnostics
The MDT KNX bus power supply offers a reliable, stable, and intelligent power supply for KNX systems – combined with state-of-the-art diagnostic and monitoring functions. Available in 640 mA , 960 mA, and 1280 mA versions, it is ideal for smart home and commercial installations that demand maximum efficiency and security. Its diagnostic functions enable precise analysis of the system status and significantly simplify maintenance and troubleshooting.
Key features
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High-performance supply
- Stabilized output voltage of 30 VDC SELV for constant bus power.
- Available variants:
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STC-0640.01 : 640 mA, 4 TE
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STC-0960.01 : 960 mA, 6 TE
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STC-1280.01 : 1280 mA, 6 TE
- Additional unthrottled output for flexible applications and expansions.
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Integrated diagnostic functions
- Monitoring of bus voltage , bus current and bus overload .
- Detection of mains voltage failures and automatic recovery.
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Event storage with timestamp in internal ring buffer, readable via 14-byte telegram.
- Safety functions for identifying device failures within the KNX line.
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Efficient design
- Colored LED indicators for normal operation, overcurrent, overtemperature and bus errors.
- Compact design for space-saving DIN rail mounting.
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Short-circuit and overload protection for maximum safety standards.
Technical details
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Voltage and current
- Supply voltage: 230 VAC, 50 Hz
- Output voltage: 30 VDC SELV
- Peak current:
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STC-0640.01 : 1200 mA
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STC-0960.01 : 1600 mA
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STC-1280.01 : 1900 mA
- Maximum continuous total current of both outputs:
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STC-0640.01 : 900 mA
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STC-0960.01 : 1300 mA
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STC-1280.01 : 1600 mA
- Efficiency at rated load:
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STC-0640.01 : >85 %
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STC-0960.01 : >87%
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STC-1280.01 : >89%
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Environmental conditions
- Operating temperature: 0 to +45 °C
- Protection rating: IP20
- Overvoltage category: III
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Assembly and connection
- Screw terminals up to 4 mm² (solid wire) or 2.5 mm² (stranded wire)
- KNX bus terminal Ø 0.8 mm (solid conductor)
Applications
- Reliable energy supply and stabilization of KNX systems in smart homes and commercial buildings
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Diagnosis and fault analysis for precise maintenance and fast service
- Efficient energy supply for large KNX installations with high power requirements
Additional benefits
- Production in Germany – certified according to ISO 9001
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3-year manufacturer's warranty for maximum reliability
- Easy integration into ETS 4/5 via KNX-TP-256 interface
Product information
Manufacturer part number: STC-1280.01
Article number: SMH0301
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