19
(3) Places where dewing (condensation) occurs due to sudden temperature
changes.
(4) Places where corrosive or inflammable gas exists.
(5) Places where a large amount of dust, iron powder and other conductive
powder, oil mist, salt or organic solvent exists.
(6) places exposed to direct sunlight.
(7) Places where a strong electric or magnetic field exists.
(8) Places where mechanical vibrations or impacts are transmitted directly to
the module body.
4.1.3 Precautions relating to the installation of the unit
The following precautions must be observed when installing a PLC to an operation
panel or other bases considering fully the operability, maintainability, and
resistance to the environment.
(1) Mounting dimension
Mounting dimensions of each base unit are as follows.
CPU
UNIT
I/O
0
I/O
1
I/O
2
I/O
3
I/O
4
I/O
5
I/O
6
I/O
7
POWER
Hs
Ws
W
H
A38B
(a) Base unit for Q4ARCPU
A37RHB A32RB A33RB A68RB
W
497 (19.57)
590 (23.23)
494 (19.45)
522 (20.55)
Ws
477 (18.78)
570 (22.44)
474 (18.66)
502 (19.76)
H 250
(9.84)
Hs 200
(7.87)
Unit: mm (inch)
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