Omron NX-AD series, User Manual

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Appendices
A - 4 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 Input Unit are explained in the table below.
A-1-2 Analog Input Units
Description of Items on Data Sheet of the Analog Input Unit
Item Description
Unit name The name of the Unit.
Model The model of the Unit.
Number of points The number of analog input 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.
Input method The analog signal input method provided by the Unit. Single-ended input and differential input
are available.
Input range The input range of the Unit.
Input conversion range The conversion range of converted values for the full scale of the Unit. Input converted values
range is fixed to the conversion limit value.
Absolute maximum rating The maximum value of analog input signals of the Unit. If a signal exceeding this range is
input, the Unit may be damaged.
Input impedance The input impedance of the Unit.
Resolution The resolution of converted values of the Unit.
Overall accuracy The analog conversion input accuracy of the Unit. It is defined under the conditions of 25
°
C
and 0 to 55
°
C.
Conversion time The time required to convert analog input signals of the Unit to the converted values.
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 input circuits and internal circuits and between the input cir-
cuits of the Unit.
Insulation resistance The insulation resistance between the input circuits and internal circuits and between each
input circuit of the Unit.
Dielectric strength The dielectric strength between the input circuits and internal circuits and between each input
circuit 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 input 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.
Input disconnection
detection The function of the Unit to detect an input disconnection. This function is provided for models
with the 4 to 20 mA input range.