Analog Output Line; Grounding - Mitsubishi Electric MELSEC-FX3S Series Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U
FX -1DA-BD (1-channel Analog Output)
3G
3.3

Analog Output Line

*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. Ground the shielded wire at one point on the signal receiving side.
3.4

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.
G-14
PLC User's Manual - Analog Control Edition
3UC
If voltage output is selected:
*1 Shield
*2 Class-D
grounding
If current output is selected:
*1 Shield
*2 Class-D
grounding
→ For details, refer to User's Manual - Hardware Edition of the each PLC Series.
Other Other
PLC
equipment
Shared grounding
Good condition
1DA-BD
Terminal
block
V+
I+
VI-
1DA-BD
Terminal
block
V+
I+
VI-
Other
PLC
equipment
Common grounding
Not allowed
3.3 Analog Output Line
2
).
3 Wiring