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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
4.1.6 FX2NC-4AD
*1. Adjustment of the offset or gain value will not affect the resolution. In the direct indication mode, however, the
offset/gain cannot be adjusted.
*2. The offset and the gain should satisfy the following condition:
1V
≤ (Gain - Offset)
*3. The offset and the gain should satisfy the following condition:
3mA
≤ (Gain - Offset) ≤ 30mA
*4. The resolution and the input/output characteristics depend on the selected mode.
*5. If 1 or more channels use the digital filter(s), the time required for A/D conversion will be
"5 ms × number of selected channels."
Specifications
FX2NC-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 ±30mA
Offset
-10V to +9V
*1,*2
-20mA to +17mA
*1,*3
Gain
-9V to +10V
*1,*2
-17mA to +30mA
*1,*3
Digital output With sign, 16 bits, binary With sign, 15 bits, binary
Resolution
*4
0.32mV(20V×1/64000)
2.5mV(20V×1/8000)
1.25μA(40mA×1/32000)
5.00μA(40mA×1/8000)
Overall accuracy
Ambient temperature:
25±5°C
±0.3%(±60mV) for 20V full scale
±0.5%(±200μA) for 40mA full scale
Same accuracy for 4mA to 20mA input
Ambient temperature:
0 to 55°C
±0.5%(±100mV) for 20V full scale
±1.0%(±400μA) for 40mA full scale
Same accuracy for 4mA to 20mA input
Time required for A/D
conversion
1ms × number of selected channels
*5
Input characteristics
*4
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.)
z
When the input mode is set to "0":
0
+32000
+10V
+10.2V
+32640
-10V
-10.2V
-32000
-32640
z
When the input mode is set to "6":
0
+16000
20mA
-20mA
-16000
+16320
+20.4mA
-16320
-20.4mA
z
When the input mode is set to "3":
0
16000
20mA
4mA
16400
20.4mA