Appendices
A - 24
NX-series Analog I/O Units User’s Manual for Analog Input Units and Analog Output Units (W522)
The meanings of the items on the data sheet of the Analog Output Unit are explained in the table below.
A-1-3 Analog Output Units
Description of Items on the Data Sheet of the Analog Output Unit
Item Description
Unit name The name of the Unit.
Model The model of the Unit.
Number of points The number of analog output points provided by the Unit.
External connection ter-
minals
The type of terminal block and connector that is used for connecting the Unit. The number of
terminals on the terminal block is also described when a screwless clamping terminal block is
used.
I/O refreshing method The I/O refreshing methods that are used by the Unit. Free-Run refreshing and synchronous
I/O refreshing are available.
Indicators The type of indicators on the Unit and the layout of those indicators.
Output range The output range of the Unit.
Output conversion range The conversion range from the converted values of the Unit to analog output signals for the full
scale. Output converted values range is fixed to the conversion limit value.
Allowable load resistance The resistance value of external load that can be connected to the Unit. The minimum value is
written for voltage output and the maximum value is written for current output.
Output impedance The output impedance of the Unit.
Resolution The resolution of converted values of the Unit.
Overall accuracy The conversion accuracy of analog outputs of the Unit. It is defined under the conditions of
25°C and 0 to 55°C.
Conversion time The time required to convert output set values of the Unit to the analog output signals.
Dimensions The dimensions of the Unit. They are described as W x H x D. The unit is "mm".
Isolation method The isolation method between the output circuits and internal circuits and between the output
circuits of the Unit.
Insulation resistance The insulation resistance between the output circuits and internal circuits and between the out-
put circuits of the Unit.
Dielectric strength The dielectric strength between the output circuits and internal circuits and between the output
circuits of the Unit.
I/O power supply method The method for supplying I/O power for the Unit. The supply method is determined for each
Unit. The power is supplied from the NX bus or the external source.
Current capacity of I/O
power supply terminal
The current capacity of the I/O power supply terminals (IOV/IOG) of the Unit. Do not exceed
this value when supplying the I/O power to the connected external devices.
NX Unit power consump-
tion
The power consumption of the NX Unit power supply of the Unit. The power consumption
when NX Units are connected to a CPU Unit and the power consumption when NX Units are
connected to a Communications Coupler Unit.
Current consumption
from I/O power supply
The current consumption from I/O power supply of the Unit. The above input current and cur-
rent consumption of any connected external devices are excluded.
Weight The weight of the Unit.
Circuit layout The output circuit layout of the Unit.
Installation orientation
and restrictions
The installation orientation of a CPU Unit containing the Unit and the installation orientation of
a Slave Terminal containing the Unit. Any restrictions to specifications that result from the
installation orientation are also given.
Terminal connection dia-
gram
A diagram of the connection between the Unit and connected external devices. When an I/O
Power Supply Connection Unit or a Shield Connection Unit is required to be connected to the
connected external devices, the description for such is included.
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