33 / 93Issued: 20.04.2018 Version: Spez KR C4 compact V10
5 Safety
 Category 3 and Performance Level d in accordance with EN ISO 13849-
1
The requirements are only met on the following condition, however:
 The EMERGENCY STOP device is pressed at least once every 12 
months.
The following components are involved in the safety functions:
 Safety controller in the control PC
 KUKA smartPAD
 Cabinet Control Unit (CCU)
 Resolver Digital Converter (RDC)
 KUKA Power Pack (KPP)
 KUKA Servo Pack (KSP)
 Safety Interface Board (SIB) (if used)
There are also interfaces to components outside the industrial robot and to 
other robot controllers.
5.5.2 Safety controller
The safety controller is a unit inside the control PC. It links safety-relevant sig-
nals and safety-relevant monitoring functions.
Safety controller tasks:
 Switching off the drives; applying the brakes
 Monitoring the braking ramp
 Standstill monitoring (after the stop)
 Velocity monitoring in T1
 Evaluation of safety-relevant signals
 Setting of safety-oriented outputs
5.5.3 Selecting the operating mode
Operating modes The industrial robot can be operated in the following modes:
 Manual Reduced Velocity (T1)
 Manual High Velocity (T2)
 Automatic (AUT)
 Automatic External (AUT EXT)
In the absence of operational safety functions and safe-
guards, the industrial robot can cause personal injury or 
material damage. If safety functions or safeguards are dismantled or deacti-
vated, the industrial robot may not be operated.
During system planning, the safety functions of the overall system 
must also be planned and designed. The industrial robot must be in-
tegrated into this safety system of the overall system.
Do not change the operating mode while a program is running. If the 
operating mode is changed during program execution, the industrial 
robot is stopped with a safety stop 2.