Mitsubishi MELSEC-F FX3U-4AD-PT-ADP User Manual

C-13
3 Wiring
3.4 Analog Input Line
FX 3U /FX 3UC Series PLC User's Manual - Analog Control Edition
FX3U-4AD-ADP (4-channel analog Input)
A
Common Items
B
FX
3UC
-4AD
C
FX
3U
-4AD-ADP
D
FX
3U
-4DA-ADP
E
FX
3U
-4AD-PT
-ADP
F
FX
3U
-4AD-TC
-ADP
G
PID Instruction (FNC 88)
3.4 Analog Input Line
For analog input, "voltage input" or "current input" can be selected for each channel.
*1. Use the 2-core shielded twisted pair cable for the analog input lines, and separate the analog input
lines from the other motive power lines or inductive lines.
*2. If "current input" is selected, be sure to short the line between the V+ terminal and the I+ terminal.
(: Channel number).
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 the 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.
250 Ω
147k Ω
ch 
47k Ω
4AD-ADP
V  +, I  +, ch  :  represents the channel number.
Terminal
block
I  +
COM 
V  +
*1
I  +
COM 
V  +
250 Ω
147k Ω
ch 
47k Ω
Class-D
grounding
24+
24-
24V DC
+15V
*1
If current input is selected:
If voltage input is selected:
*2
Connection of external
power supply line
PLC
Another
equipment
PLC
Another
equipment
PLC
Another
equipment
Shared grounding
Good condition
Common grounding
Not allowed
Independent grounding
Best condition

Mitsubishi MELSEC-F FX3U-4AD-PT-ADP Specifications

General

Brand	Mitsubishi
Model	MELSEC-F FX3U-4AD-PT-ADP
Category	Controller
Language	English