Omron NX-AD series User Manual page 241

Unit name Analog Input Unit (voltage input type)
Number of points 8 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 Supply from the NX bus
method
NX Unit power con- • Connected to a CPU Unit
sumption
1.45 W max.
• Connected to a Communications Cou-
pler Unit
1.15 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
24 VDC
Input disconnection Not supported.
detection
NX-series Analog I/O Units User's Manual for Analog Input Units and Analog Output Units (W522)
Input1+ to 4+
Terminal block
AG
I/O power supply +
I/O power supply −
Additional I/O I/O Power Supply
Power Supply Unit
Connection Unit
A1 B1 A1
IOV IOV IOV
IOV
IOG IOG IOV
IOV
IOV IOV
IOV
IOV
IOG IOG IOV
IOV
A8 B8 A8
Model NX-AD4603
External connection Screwless clamping terminal block (16 ter-
terminals minals)
Input method Single-ended 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 IOG: 0.1 A/terminal max.
power supply terminal
Current consumption No consumption
from I/O power supply
AMP
1 MΩ
AG: Analog circuit
AG
internal GND
Voltage Input Unit
NX-AD4603
B1 A1 B1
IOV Input1+ Input2+
IOV IOG IOG
Input3+Input4+
IOV
IOV IOG IOG
Three-wire sensor
IOV
Input5+Input6+
IOV
IOG IOG
IOV Input7+Input8+
IOV IOG IOG
B8 A8 B8
Appendices
I/O power supply +
NX bus
connector
I/O power supply −
(right)
Input +
24 V (Sensor power supply +)
0 V (Sensor power supply − /
Input −)
A - 21
A