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The Schneider Electric MTN683901 is a REG emergency power supply designed for KNX bus systems, ideal for maintaining critical automation functions during power outages. Its key benefit is buffering the KNX bus voltage using an external battery, ensuring uninterrupted operation of smart home or building management systems. A potential caveat is the requirement for an external lead-gel battery, which is not included with the unit.
| Model Part Number | MTN683901 |
|---|---|
| Brand | Schneider Electric |
No, the Schneider Electric MTN683901 requires a separate, external DC 12V lead-gel battery. This must be purchased in addition to the power supply unit.
The unit provides a maximum output current of 300 mA without a battery connected, and up to 640 mA when using the external battery for buffering.
The MTN683901 is designed for mounting on a standard DIN-rail (TH35 according to EN 60715).
The unit outputs a regulated DC voltage of 30 V ± 2 V to the KNX bus.
The unit is designed with integrated charging electronics specifically for lead-gel batteries. Using other battery types may result in improper charging or damage.
During a total power failure, the integrated electronics will switch to the connected external lead-gel battery to maintain the KNX bus voltage and ensure continued operation.
The unit includes a binary input which can be used to record its operational status. You would typically connect this to another KNX device or system capable of monitoring such inputs.
Verify the AC mains power connection is secure and within the specified voltage range (AC 92 V - AC 253 V). Check that the KNX bus wiring is correctly terminated.
Ensure the external battery is correctly connected and charged. Check the output voltage (DC 30 V ± 2 V) and the maximum output current rating (300mA without battery, 640mA with battery).
Confirm the battery is compatible (DC 12V lead-gel) and correctly connected with proper polarity. Ensure the unit is receiving AC mains power.
Refer to the specific LED indicator meanings in the full product manual (not provided here) or consult Schneider Electric support for error code interpretation.
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