Omron NX-AD series User Manual

Appendices
A - 12
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-AD3203
Number of points 4 points External connection
terminals
Screwless clamping terminal block (12 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 250 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., IOG: 0.1 A/termi-
nal max.
NX Unit power con-
sumption
• Connected to a CPU Unit
1.25 W max.
• Connected to a Communications Cou-
pler Unit
0.90 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
AG
AMP
IOV
IOG
Input1+ to 4+ Terminal block
250 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
IOV
IOG
IOV
IOG
IOV
IOG
IOV
IOG
IOG
IOV
IOV
A1 B1
A8 B8
IOG
IOG
IOV
IOV
IOG
24 VDC
A1 B1
A8 B8
Additional I/O
Power Supply Unit
Current Input Unit
NX-AD3203
Input1+
Input2+
Input3+Input4+

Omron NX-AD series Specifications

General

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