FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
357
18 Other Extension Devices and Optional Units (External Dimensions and Terminal Arrangement)
18.1 Special Function Units/Blocks
11
High-Speed 
Counters
12
Output Wiring
13
Wiring for 
Various Uses
14
Test Run, 
Maintenance, 
Troubleshooting
15
IInput/Output 
Powered 
Extension Units
16
Input/Output 
Extension 
Blocks
17
Extension 
Power Supply 
Unit
18
Other Extension 
Units and 
Options
19
Display Module
20
Terminal Block
18.1.3 FX2N-2DA
External Dimensions
•MASS(Weight): 0.2kg (0.44lbs)
•Installation: 35 mm (1.38") wide DIN rail 
or screws
•Accessories: Label for indication of special 
unit/block number,
Manual supplied with product
•Terminal block: M3 screws
•The extension cable is already connected to 
the extension block
Terminal Layout
18.1.4 FX3U-4AD
External Dimensions
•MASS(Weight): 0.2kg (0.44lbs)
•Installation: 35 mm (1.38") wide DIN rail 
or screws
•Accessories: Label for indication of special 
unit/block number,
Dust Proof sheet,
Manual supplied with product
•Terminal block: M3 screws
•The extension cable is already connected to 
the extension block
Terminal Layout
87(3.43")
80(3.15")
(mounting hole pitch)
90(3.55")
Unit:mm (inches)
4(0.16")
9(0.36")
43(1.7")
2-φ4.5 mounting holes
IOUT2VOUT2
VOUT1 IOUT1 COM1
COM2
FX
3U
-4AD
 
2-φ4.5 mounting holes
Unit:mm (inches)
4(0.16")
55(2.17")
87(3.43")
80(3.15")
(mounting hole pitch)
90(3.55")
9(0.36")
24+
24- V+ I+
VI- FG
V+ I+ V+
FGVI- VI-
I+ V+ I+
VI-FG
CH1 CH2 CH3 CH4