Omron NX-AD series User Manual page 227

Unit name Analog Input Unit (current input type)
Number of points 2 points
I/O refreshing method Free-Run refreshing
Indicators TS indicator
Dimensions 12 (W) x 100 (H) x 71 (D)
Insulation resistance 20 MΩ min. between isolated circuits (at
100 VDC)
I/O power supply No supply
method
NX Unit power con- • Connected to a CPU Unit
sumption
1.25 W max.
• Connected to a Communications Cou-
pler Unit
0.90 W max.
Weight 70 g max.
Circuit layout
NX bus
connector
(left)
Installation orienta- Installation orientation:
tion and restrictions
• Connected to a CPU Unit
Possible in upright installation.
• Connected to a Communications Coupler Unit
Possible in 6 orientations.
Restrictions: No restrictions
Terminal connection
diagram
A1
A8
Input disconnection Supported
detection
NX-series Analog I/O Units User's Manual for Analog Input Units and Analog Output Units (W522)
Input1+ to 2+
Terminal block Input1− to 2−
AG
I/O power supply +
I/O power supply −
Current Input Unit
NX-AD2204
B1
Input1+ Input2+
Input1− Input2−
AG AG
NC NC
AG terminal is connected to 0 V of analog circuit inside the Unit.
It is not necessary to wire AG terminal normally.
B8
Model
External connection
terminals
Input method
Input range
Input conversion range
Absolute maximum
rating
Input impedance
Resolution
Overall 25°C
accuracy
to
0 55°C
Conversion time
Isolation method
Dielectric strength
Current capacity of I/O
power supply terminal
Current consumption
from I/O power supply
250 Ω
AMP
510 KΩ 510 KΩ
AG: Analog circuit
internal GND
AG
Input +
Input −
Appendices
NX-AD2204
Screwless clamping terminal block (8 ter-
minals)
Differential input
4 to 20 mA
-5 to 105% (full-scale)
±30 mA
250 Ω
1/8000 (full scale)
±0.2% (full scale)
±0.4% (full scale)
250 μs/point
Between the input and the NX bus: Power
= Transformer, Signal = Digital isolator (no
isolation between inputs)
510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA max.
Without I/O power supply terminals
No consumption
I/O power supply +
NX bus
connector
I/O power supply −
(right)
A
A - 7