Analog Output Wiring - Mitsubishi Electric FX3G User Manual

FX /FX /FX /FX /FX
3S 3G 3GC 3U
FX -4DA (4-channel Analog Output)
3U
3.4

Analog Output Wiring

The analog output mode, "voltage output "or "current output", can be selected for each channel.
External power supply
ch :  represents the channel number.
*1. For FX
3G
Do not connect any wires to the " • " terminal.
*2.
*3. Use a 2-core twisted shield wire for analog output wire, and separate it from other power lines or
inductive lines.
If there is ripple or noise in the output voltage, connect a capacitor of approximately 0.1 to 0.47 μF
*4.
25 V in the vicinity of the signal receiving side.
*5. 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 AWG14 (2mm
• The grounding point should be close to the PLC, and all grounding wires should be as short as possible.
E-12
PLC User's Manual - Analog Control Edition
3UC
wiring
24V DC
*1
Class-D grounding
If voltage output is
selected
Shield *3
Class-D
*4
*5
grounding
If current output is
selected
Shield *3
Class-D
grounding *5
/FX Series PLC (AC power type), the 24 V DC service power supply is also available.
3U
→ For details, refer to the User's Manual - Hardware Edition of each PLC Series.
Other Other
PLC
equipment
Shared grounding
Good condition
FX -4DA
3U
24+
24-
*2
ch
V+
I+
VI-
ch
V+
I+
VI-
Other
PLC
equipment
Common grounding
Not allowed
2
).
3 Wiring
3.4 Analog Output Wiring
+15V
-15V
ch
ch