2 Specifications
2 - 6
NX-series Safety Control Unit User’s Manual (Z930)
The following table gives the meaning of the datasheet items for the Safety Input Units.
2-2-3 Safety Input Units
Datasheet Items for Safety Input Unit
Item Specification
Unit name This is the name of the Unit.
Model This is the model number of the Unit.
Number of safety input points This is the number of safety input points on the Unit.
Number of test output points This is the number of test output points on the Unit. The test output points
are used with the safety input terminals.
Internal I/O common This is the polarity that the Unit uses to connect to input devices. There are
models with NPN and PNP connections.
Rated input voltage This is the rated input voltage of the Unit.
OMRON Special Safety Input
Devices
This tells whether the Unit supports the connection of OMRON Special
Safety Input Devices (D40A Non-contact Door Switches, E3FS Single
Beam Safety Sensors, etc.).
Number of safety slave connec-
tions
This is the number of safety slave connections that the Unit can have
through FSoE. You can connect to one Safety CPU Unit for each safety
slave connection.
I/O refreshing method This is the I/O refreshing method for the Unit. Only Free-Run refreshing is
supported.
External connection terminals This is the type of terminal block or connector that is used to wire the Unit.
This specification includes the number of terminals for a screwless clamp-
ing 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 cur-
rent
These are the input voltage and input current at which the safety inputs on
the Unit turn OFF.
Test output type This is the polarity that the Unit uses to connect to devices. The Unit uses
PNP connections.
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 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 cir-
cuits of the Unit.
I/O power supply method This is the method that is used to supply I/O power to the Unit. Each Unit
has its own me
thod for supplying power. The power can be supplied either
from the NX bus or from an external source.
Current capacity of I/O power sup-
ply terminals
This is the current capacity of the I/O power supply terminals (IOV and 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.
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