Beckhoff Bus Terminal - KL9570 | Buffer capacitor terminal
Buffer capacitor terminal KL9570
Power contact
Power contact
Top view 
Contact assembly 
extended shock and vibration range 25g

KL9570 | Buffer capacitor terminal

The KL9570 Bus Terminal contains high-performance capacitors for stabilising supply voltages. The KL9570 can be used in conjunction with KL2531/KL2541 stepper motor terminals and KL2532/KL2552 DC motor terminals. Low internal resistance and high-pulsed current capability enable good buffering in parallel with a power supply unit. Return currents are stored, particularly in the context of drive applications, thereby preventing overvoltages. If the regenerative energy exceeds the capacity of the capacitors, energy can be dissipated via an external braking resistor.

Technical data KL9570 | KS9570
Nominal voltage 50 V
Capacity 500 µF
Ripple current (max.) 10 A @ 100 kHz
Internal resistance < 20 mΩ @ 100 kHz
Surge voltage protection > 56 V
Recommended ballast resistor ZB8110
Overvoltage control range ±2 V
Ballast resistor clock rate load-dependent, 2-point control
Electrical isolation 1500 V (K-bus/field potential)
Weight approx. 65 g
Operating/storage temperature 0…+55 °C/-25…+85 °C
Relative humidity 95 %, no condensation
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 CE, Ex
ZB8110 external ballast resistor, 10 Ω, 100 W, for EL9576 brake chopper terminal and for KL9570 Bus Terminal
Product announcement
KL9570: available
KS9570: estimated market release on request