16 / 93 Issued: 20.04.2018 Version: Spez KR C4 compact V10
KR C4 compact
Connection panel
3.5.1 Control PC interfaces
Motherboards The following motherboard variants can be installed in the control PC:
 D3076-K
 D3236-K
 D3445-K
Fig. 3-5: KR C4 compact interfaces
1 X11 Safety interface (option)
2 smartPAD connection X19
3 X65 Extension interface
4 X69 Service interface
5 X21 Manipulator interface
6 Ethernet safety interface X66
7 K1 power supply connection
8 Motor connector X20
9 Control PC interfaces
Only safety interface X11 or Ethernet safety interface X66 (PRO-
FIsafe/CIP Safety) can be configured.
All contactor, relay and valve coils that are connected to the robot 
controller by the user must be equipped with suitable suppressor di-
odes. RC elements and VCR resistors are not suitable.
KUKA Deutschland GmbH has assembled, tested and supplied the 
motherboard with an optimum configuration. No liability will be ac-
cepted for modifications to the configuration that have not been car-
ried out by KUKA Deutschland GmbH.