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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
μ
s/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 M
Ω
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
to 8+
Terminal block
85 Ω
AG: Analog circuit internal GND
NX bus
connector
(left)
I/O power
I/O power supply
−
I/O power
I/O power supply
−
NX bus
connector
(right)
Input +
24 V (Sensor power )
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
Содержание NX-AD series
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