KL9540, KL9550 - Surge Filter Terminals

KL9540-0010 - introduction


Surge filter terminals for field supply of analog Bus Terminals

The KL9540-0010 system terminal includes an overvoltage filter for the 24 V field supply.
The filter protects the Bus Terminal from line-bound surge voltages that can occur due to high-energy disturbance variables such as switching overvoltages at inductive consumers or lightning strikes at the supply lines.

The KL9540-0010 can protect Bus Terminal stations in particularly harsh environments from damage.
The use of such overvoltage filters is stipulated by the ship classification organizations in shipbuilding and on/offshore applications in which GL certification is required.
The KL9540-0010 is intended in particular for the protection of analog terminals; the standard variant KL9540 for digital terminals.

The LED indicates the 24 V rated voltage. The terminal does not transfer process data to the higher-level control system.

LED displays

Power (green)
Field supply voltage present