System terminal, surge filter field supply KL9540
Power LED
Power contact
+24 V
Power contact 0 V
Power contact PE
Power contact
Power contact
Power contact
+24 V
0 V
Top view 
Contact assembly 
extended temperature range
extended shock and vibration range 25g

KL9540 | System terminal, surge filter field supply

The KL9540 system terminal contains 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 disturbances such as switching overvoltages at inductive consumers or lightning strikes at the supply lines. The KL9540 protects the Bus Terminal station from damage in particularly harsh environments. The ship classification organisations require the use in shipbuilding applications and in the onshore/offshore sector.

Technical data KL9540 | KS9540
Nominal voltage 24 V DC (-15 %/+20 %)
Surge filter field supply yes
Surge filter system supply
Rated current field supply ≤ 10 A
Rated current system supply
PE connection yes
Weight approx. 40 g
Operating/storage temperature -25…+60 °C/-40…+85 °C
Vibration/shock resistance conforms to EN 60068-2-6/EN 60068-2-27
EMC immunity/emission conforms to EN 61000-6-2/EN 61000-6-4
Protect. class/installation pos. IP 20/variable
Pluggable wiring for all KSxxxx Bus Terminals
Approvals/markings CE, UL, ATEX, GL
Ex marking II 3 G Ex nA IIC T4 Gc
Related products
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KL9550 Surge filter system and field supply