Safety Precautions
16
NX-series Safety Control Unit User’s Manual (Z930)
Check during the import of the user defined function that the CRC of the imported function
block is correct.
Serious injury may possibly occur due to loss of required safety functions.
Debugging
Before you perform safety validation of the safety programs, complete debugging of the
safety programs.
Otherwise, the Safety CPU Unit will start with safety programs that are not fully debugged
and may cause serious personal injury.
Make sure that the area around the system is safe before you change the operating mode,
change present values, or execute forced refreshing. The outputs may operate and may
cause serious injury.
Testing Operation
Before you start the system, perform user testing to make sure that all safety devices oper-
ate correctly.
Serious injury may possibly occur due to loss of required safety functions.
Although the Simulator and Simple Automatic Test simulate the operation of the Safety
CPU Unit, there are differences from the Safety CPU Unit in operation and timing. Always
confirm operation on the actual equipment before you operate the equipment.
Accidents may occur if the controlled system performs unexpected operation.
Wiring
Wire the safety input and output lines so that they do not touch other lines.
Serious injury may possibly occur due to loss of required safety functions.
Wire the Safety Control Unit properly so that 24-VDC lines do not touch output lines acci-
dentally or unintentionally.
Serious injury may possibly occur due to loss of required safety functions.
Wire the safety output lines and 24-VDC lines so that ground faults will not cause the loads
to turn ON.
Serious injury may possibly occur due to loss of required safety functions.
The wiring information that is displayed on the Sysmac Studio is for reference only and may
differ from the actual wiring diagrams. Always confirm the actual wiring and performing suit-
able wiring. Serious injury may possibly occur due to loss of required safety functions.
During Power Supply
Do not attempt to take any Unit apart. In particular, high-voltage parts are present in the
Power Supply Unit while power is supplied or immediately after power is turned OFF.
Touching any of these parts may result in electric shock. There are sharp parts inside the
Unit that may cause injury.
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