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4 Comparison of Performance Specifications
4.1 Analog Input
FX
3G
/FX
3U
/FX
3UC
PLC User's Manual - Analog Control Edition
Common Items
4.1 Analog Input
4.1.4 FX2N-4AD
*1. Adjustment of the offset or gain value will not affect the resolution.
*2. The offset and the gain should satisfy the following condition:
1V
≤ (Gain - Offset) ≤ 15V
*3. The offset and the gain should satisfy the following condition:
4mA
≤ (Gain - Offset) ≤ 32mA
Specifications
FX2N-4AD
Voltage input Current input
Number of input points 4ch
Analog input range
-10V to +10V DC
(Input resistance: 200kΩ)
-20mA to +20mA DC
4mA to 20mA DC
(Input resistance: 250 Ω)
Absolute maximum input ±15V ±32mA
Offset
-5V to +5V
*1,*2
-20mA to +20mA
*1,*3
Gain
-4V to +15V
*1,*2
-16mA to +32mA
*1,*3
Digital output With sign, 12 bits, binary With sign, 11 bits, binary
Resolution
5mV(20V×1/4000)
*1
20μA(40mA×1/2000)
*1
Overall accuracy
Ambient temperature:
25±5°C
--
Ambient temperature:
0 to 55°C
±1.0%(±200mV) for 20V full scale
±1.0%(±400μA) for 40mA full scale
Same accuracy for 4mA to 20mA input
Time required for A/D
conversion
Normal conversion mode:15ms × number of selected channels
High-speed conversion mode: 6ms × number of selected channels
Input characteristics
Insulation method
• The photocoupler is used to insulate the analog input area from the PLC.
• The DC/DC converter is used to insulate the power supply from the analog inputs.
• Channels are not insulated from each other.
Number of I/O points
occupied
8 points (Taken from either the input or output points of the PLC.)
0
+2000
+10V
+10.235V
+2047
-10V
-10.240V
-2000
-2048
z
When the input is set from -20 mA to +20 mA:
0
+1000
+20mA
-20mA
-1000
+1600
+32mA
-1600
-32mA
z
When the input is set from 4 mA to 20 mA:
0
1000
20mA
4mA
1750
32mA