Omron NX-AD series User Manual page 236

Appendices
Unit name Analog Input Unit (voltage input type)
Number of points 4 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
1.35 W max.
• Connected to a Communications Cou-
pler Unit
1.10 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
Voltage Input Unit
diagram
A1
A8
Input disconnection Not supported.
detection
A - 16
Input1+ to 4+
Terminal block Input1− to 4−
510 KΩ
AG
I/O power supply +
I/O power supply −
NX-AD3604
B1
Input1+ Input2+
Input1− Input2−
Input3+ Input4+
Input3− Input4−
AG AG
AG AG
AG terminal is connected to 0 V of analog circuit inside the Unit.
B8 It is not necessary to wire AG terminal normally.
NX-series Analog I/O Units User's Manual for Analog Input Units and Analog Output Units (W522)
Model NX-AD3604
External connection Screwless clamping terminal block (12 ter-
terminals minals)
Input method Differential input
Input range -10 to +10 V
Input conversion range -5 to 105% (full scale)
Absolute maximum ±15 V
rating
Input impedance 1 MΩ min.
Resolution 1/8000 (full scale)
Overall 25°C ±0.2% (full scale)
accuracy
to
±0.4% (full scale)
0 55°C
Conversion time 250 μs/point
Isolation method Between the input and the NX bus: Power
= Transformer, Signal = Digital isolator (no
isolation between inputs)
Dielectric strength 510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA max.
Current capacity of I/O Without I/O power supply terminals
power supply terminal
Current consumption No consumption
from I/O power supply
AMP
510 KΩ
AG: Analog circuit
internal GND
AG
Input +
Input −
I/O power supply +
NX bus
connector
I/O power supply −
(right)