FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
142
8 Installation In Enclosure
8.7 Connecting Methods for Main Unit and Extension Devices
8.7.2 Connecting method A - connection of expansion board
To connect an expansion board to the main unit in the enclosure, it is necessary to remove the main unit from
the enclosure.
→ Refer to Subsection 8.5.4 for the "removal from DIN rail" procedure.
→ Refer to Section 8.6 for the "direct mounting" removal procedure.
1 Insert the tip of a flathead screwdriver into
the part A of the expansion board com-
partment dummy cover (B in the right fig-
ure) on the left side of the main unit, and
slightly lift the dummy cover.
• Put the main unit on the edge of a desk or so to insert the
screwdriver.
Caution
Take care not to damage the wiring board and electronic
components with the screwdriver.
2 Remove the expansion board compart-
ment dummy cover (B in the right figure).
3 Hold the expansion board (C in the right
figure) parallel to the main unit, and fit the
board to the expansion board connector.
4 Secure the expansion board (C in the right
figure) on the main unit with the supplied
M3 tapping screws (D in the right figure).
• Tightening torque: 0.3 to 0.6 N•m
B
A
1
2
B
4
D
D
C
3
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