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2 Specifications
NX-series Safety Control Unit User’s Manual (Z930)
2-2 Specifications of Individual Units
2
2-2-4 Safety Output Units
The following table gives the meaning of the datasheet items for the Safety Output Units.
2-2-4 Safety Output Units
Datasheet Items for Safety Output Unit
Item Specification
Unit name This is the name of the Unit.
Model This is the model number of the Unit.
Number of safety output points This is the number of safety output points on the Unit.
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.
Maximum load current This is the maximum load current for outputs on the Unit. A specification is
given for each output and each Unit.
Rated voltage This is the rated voltage of the outputs on the Unit.
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 output rated current This is the maximum load current for safety outputs on the Unit. The inrush
current of the external connection load must be lower than this value.
Safety output ON residual voltage This is the residual voltage when a safety output on the Unit is ON.
Safety output OFF residual voltage This is the residual voltage when a safety output on the Unit is OFF.
Safety output leakage current This is the leakage current when a safety 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 output circuits from the internal
circuits of the Unit.
Insulation resistance This is the insulation resistance between the output circuits and the internal
circuits of the Unit.
Dielectric strength This is the dielectric strength between the output 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. Each Unit
has its own method 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
va
lue d
oes 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 external devices.
Installation orientation and restric-
tions
This is the installation orientation of the Slave Terminal that includes this
Unit. If the installation orientation imposes any restrictions on the specifica-
tions, those restrictions are also described.
Protective functions These are the protective functions that are supported by the Unit.
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