Omron NX-SL3300 User Manual page 167

NX-SO
So0
So1
IOG
IOG
Types of Safety Output Functions
The types of safety output functions that are performed by the Safety Output Unit is shown below.
The safety output functions diagnose the outputs to the safety output terminals and the external device
wiring based on the safety output data from the safety program.
The execution results of the safety program are evaluated by the safety output functions and the eval-
uation results are output from the safety output terminals.
Safety Input Unit
Safety input
function
Safety input data
Self-diagnosis
Test Pulse Evaluation
A pulse is output at a specific
interval to detect wiring errors in the
externally connected device.
Dual channel evaluation
When safety output terminals are
used as dual channels, the two
outputs are checked for
consistency.
Other Functions
I/O power supply monitoring
This function monitors the voltage range of the I/O power supply to ensure the
operation of the internal circuits.
I/O power supply OFF circuit test
This function shuts OFF the I/O power supply and diagnoses the function that shuts
OFF the I/O power supply to see if it is operating correctly.
NX-series Safety Control Unit User's Manual (Z930)
L L
Safety CPU Unit
Safety process
Safety program
data
execution
communications
Without test pulse
With test pulse
Single channel
There is no redundancy.
Dual channel equivalent
Make sure that the two outputs have
the same value.
4 Safety Control Unit Operation
NX-SO
So0
So1
L
IOG
IOG
Safety Output Unit
Safety process
Safety output
data
function
communications
Safety output data
L
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