KL9550 - introduction

Surge filter terminals for field supply and K-Bus supply
The KL9550 surge filter terminal contains overvoltage filters for the field supply (power contacts) and the K-Bus supply (Bus Coupler). The filters protect the components from line-bound surge voltages that can occur due to high-energy disturbance variables such as switching surges at inductive consumers or lightning strikes at the supply lines.
LED displays
LED | Meaning | |
---|---|---|
Power system (green) | on | K-Bus supply voltage present |
Power field (green) | on | Field supply voltage present |