Omron NX-AD series User Manual

Appendices
A - 18
NX-series Analog I/O Units User’s Manual for Analog Input Units and Analog Output Units (W522)
Unit name Analog Input Unit (current input type) Model NX-AD4203
Number of points 8 points External connection
terminals
Screwless clamping terminal block (16 ter-
minals)
I/O refreshing method Free-Run refreshing
Indicators TS indicator Input method Single-ended input
Input range 4 to 20 mA
Input conversion range -5 to 105% (full scale)
Absolute maximum
rating
±30 mA
Input impedance 85 Ω
Resolution 1/8000 (full scale)
Overall
accuracy
25 ° C ±0.2% (full scale)
0 to 55 ° C
±0.4% (full scale)
Conversion time 250 μs/point
Dimensions 12 (W) x 100 (H) x 71 (D) Isolation method Between the input and the NX bus: Power
= Transformer, Signal = Digital isolator (no
isolation between inputs)
Insulation resistance 20 MΩ min. between isolated circuits (at
100 VDC)
Dielectric strength 510 VAC between isolated circuits for 1
minute at a leakage current of 5 mA max.
I/O power supply
method
Supply from the NX bus Current capacity of I/O
power supply terminal
IOV: 0.1 A/terminal max.
NX Unit power con-
sumption
• Connected to a CPU Unit
1.40 W max.
• Connected to a Communications Cou-
pler Unit
1.05 W max.
Current consumption
from I/O power supply
No consumption
Weight 70 g max.
Circuit layout
Installation orienta-
tion and restrictions
Installation orientation:
• 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
Input disconnection
detection
Supported
IOV
AMP
AG AG
Input1+ to 8+
Terminal block
85 Ω
AG: Analog circuit internal GND
NX bus
connector
(left)
I/O power supply +
I/O power supply −
I/O power supply +
I/O power supply −
NX bus
connector
(right)
Input +
24 V (Sensor power supply +)
0 V (Sensor power supply − /
Input −)
Three-wire Sensor
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOG
IOV
A1 B1
A8 B8
IOV
IOV
IOV
IOV
IOV IOV
IOV
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
24 VDC
A1 B1
A8
B8
A1 B1
A8 B8
Additional I/O
Power Supply Unit
Current Input Unit
NX-AD4203
I/O Power Supply
Connection Unit
Input1+
Input2+
Input3+Input4+
Input7+Input8+
Input5+Input6+

Omron NX-AD series Specifications

General

Brand	Omron
Model	NX-AD series
Category	I/O Systems
Language	English