Mitsubishi FX3U-4AD User Manual page 278

FX /FX /FX PLC User's Manual - Analog Control Edition
3G 3U 3UC
FX -4DA-ADP (4-channel analog Output)
3U
3.4 Analog Output Line
The analog output type, "voltage output" or "current output", can be selected for each channel.
If voltage output is selected:
If current output is selected:
Connection of external power
V +, I +, ch :
*1. Use 2-core shielded twisted pair cable for the analog output lines, and separate the analog output
lines from other power lines or inductive lines.
*2. 24V DC service power supply of the FX
*3. Ground the shielded wire at one point on the signal receiving side.
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.
PLC
equipment
Independent grounding
Best condition
• The grounding wire size should be AWG22 to 20 (0.3 to 0.5 mm
• The grounding point should be close to the PLC, and all grounding wires should be as short as possible.
F-14
Terminal
*1 Shielded
*3
*3
supply line
24V DC
*2
Class-D
grounding
represents the channel number.
→ For details, refer to User's Manual - Hardware Edition of the PLC Series.
Other Other
PLC
equipment
Shared grounding
Good condition
4DA-ADP
block
V +
I +
COM
V +
I +
COM
24+
24-
/FX Series PLC can also be used.
3G 3U
Other
PLC
equipment
Common grounding
Not allowed
2
).
3.4 Analog Output Line
ch
ch
+15V
3 Wiring