Item Specification
External connection terminals This is the type of terminal block and connector that is used to wire the
Unit. This specification includes the number of terminals for a screwless
clamping terminal block.
Indicators This gives the names and the layout of the indicators on the Unit.
Safety input current This is the input current at the rated voltage of the safety inputs on the
Unit.
Safety input ON voltage This is the input voltage at which the safety inputs on the Unit turn ON.
Safety input OFF voltage/OFF
current
These are the input voltage and input current at which the safety inputs on
the Unit turn OFF
.
T
est output type This is the polarity that the Unit uses to connect to devices.
Test output rated current This is the maximum load current for each test output on the Unit.
Test output ON residual voltage This is the residual voltage when the test output on the Unit is ON.
Test output leakage current This is the leakage current when the test output on the Unit is OFF.
Dimensions (mm) These are the external dimensions of the Unit. The dimensions are given
in the form W × H × D. The dimensions are given in millimeters.
Isolation method This is the method that is used to isolate the input circuits from the internal
circuits of the Unit.
Insulation resistance This is the insulation resistance between the input circuits and the internal
circuits of the Unit.
Dielectric strength This is the dielectric strength between the input circuits and the internal
circuits of the Unit.
I/O power supply method This is the method that is used to supply I/O power to the Unit.
Current capacity of I/O power
supply terminal
This is the current capacity of the I/O power supply terminals (IOV/IOG)
on the Unit. When you supply I/O power to external devices that are con-
nected to the Unit, make sure that the total power does not exceed this
value.
NX Unit power consumption This is the power consumption of the Unit from the NX bus power supply.
Current consumption from I/O
power supply
This is the current consumption of the Unit from the I/O power supply. This
value does not include the load current of any external connection loads
or the current consumption of any connected external devices.
Weight This is the weight of the Unit.
Circuit layout This is the internal circuits of the Unit.
Terminal connection diagram This is the connection diagram between the Unit and connected external
devices.
Installation orientation and re-
strictions
This is the installation orientation of the Unit. If the installation orientation
imposes any restrictions on the specifications, those restrictions are also
described.
Protective functions These are the protective functions that are supported by the Unit.
l
NX-SIH400
Item Specification
Number of safety input points 4 points
Number of test output points 2 points
Internal I/O common PNP (sinking inputs)
Rated input voltage 24 VDC (20.4 to 28.8 VDC)
OMRON Special Safety Input De-
vices
Can be connected.
Number of safety slave connec-
tions
1
2 Specifications
2 - 18
NX-series Safety Control Unit User's Manual (Z930)
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