> Lighting Control > System components > MTN683901,light grey,Emergency power supply REG-K 
To buffer the bus voltage. If a complete mains failure occurs, an external lead gel battery with a voltage of DC 12 V (SELV) can be connected to the REG power supply for buffering. The lead gel battery is recharged or maintained in its charged state by integrated charging electronics.
A binary input can be connected in order to register the operational statuses (mains voltage,error warning, battery operation).
For installation on DIN rails TH35 according to EN 60715. A data rail is not necessary. Mains voltage: AC 110 - 230 V, 50‑60 Hz
Output to power supply:Output voltage: DC 30 V ±2 V
Output current: without battery with mains supply max. 300 mA, with battery without mains supply max. 640 mA
Short-circuit current: < 1.5 A
Charging current: max. 1 A
Connections: plug-in screw terminal for main connector, operating state (4-pin, 3 floating contacts) and emergency power supply. Plug-in terminal for battery connection (two 1 mm pins)
Device width: 4 modules = approx. 72 mm
In KNX, to be completed with: KNX power supply REG-K/160 mA with emergency power input MTN683816, KNX power supply REG-K/320 mA with emergency power input MTN683832, KNX power supply REG-K/640 mA with emergency power input MTN683890
Accessories: Lead gel battery MTN668990, MTN668991, Binary input REG-K/4x24 MTN644892, Power supply REG, 24 V DC / 0.4 A MTN693003
Contents: With connecting terminal and cable cover
