Grounding; Analog Output Line - Mitsubishi Electric FX3G User Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U
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:  represents the channel number.
*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. For FX
3S
*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 100 Ω 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-16
PLC User's Manual - Analog Control Edition
3UC
*1 Shielded
Class-D
*3
grounding
Class-D
*3
grounding
supply line
*2
24V DC
Class-D
grounding
/FX /FX Series PLC (AC power type), the 24 V DC service power supply is also available.
3G 3U
→ For details, refer to User's Manual - Hardware Edition of the each PLC Series.
Other Other
PLC
equipment
Shared grounding
Good condition
4DA-ADP
Terminal
block
V+
I+
COM
V+
I+
COM
24+
24-
Other
PLC
equipment
Common grounding
Not allowed
3.4 Analog Output Line
ch
ch
+15V
2
).
3 Wiring