D-14
3 Wiring
3.4 Analog Output Line
FX
3U
/FX
3UC
Series PLC User's Manual - Analog Control Edition
FX3U-4DA-ADP (4-channel analog Output)
3.4 Analog Output Line
The analog output type, "voltage output" or "current output", can be selected for each channel.
*1. Use the 2-core shielded twisted pair cable for the analog output lines, and separate the analog output
lines from the other power lines or inductive lines.
3.5 Grounding
Grounding should be performed as stated below.
• The grounding resistance should be 100Ω or less.
• Independent grounding should be performed for best results.
When independent grounding is not performed, perform "shared grounding" as shown in the following
figure.
→ For details, refer to User’s Manual - Hardware Edition of each Series.
• The grounding wire size should be AWG22 to 20 (0.3 to 0.5 mm
2
).
• The grounding point should be close to the PLC, and all grounding wires should be as short as possible.
ch
4DA-ADP
V
+
, I
+, ch
:
represents the channel number.
Terminal
block
I
+
COM
V
+
I
+
COM
V
+
Class-D
grounding
24+
24-
24V DC
*1
*1
If voltage output is selected:
If current output is selected:
Connection of external power
supply line
+15V
ch
PLC
Another
equipment
PLC
Another
equipment
PLC
Another
equipment
Shared grounding
Good condition
Common grounding
Not allowed
Independent grounding
Best condition
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