Toshiba T2N - Manual (Page 82)

4.Installation and Wiring
User’s manual 67
(1) For the positioning of the I/O modules, arrange the low-power system I/O
to the left and high-power system I/O to the right, and keep the wiring
separate.
(2) The gap between units should be at least 70mm for maintenance and
ventilation.
(3) Separate by at least 200mm from power lines and power equipment, or
shield with a steel plate (the steel plate must be grounded).
(4) For the sizes of input/output wiring, see the Table below.
Numbers of Points in Modules Wire Sizes to Use
16-point module 0.5
∼
1.25mm 2
32/64-point module 0.1
∼
0.3mm 2
However, for common lines, use a thicker size which takes account of
the current capacity. Also, for cables outside the panel, the use of cable of
at least 1.25mm 2 is recommended to keep the impedance low.
(5) The terminal screws are M3.5. For suitable crimp-style terminals,
use terminals with width 7mm or less for M3.5 screws.
(6) Both inside and outside the panel, always avoid wiring input/output signal
lines in bundles with, in proximity, or in parallel with high-voltage lines and
power lines. When separation is difficult, use multi-core shielded cable
depending on the type of input/output signals, and make a single-point
ground for the shield at the service entrance in the panel (in the cases of
AC I/O,DC I/O and relay output modules).
(7) Pay attention to 3.Application Precautions for I/O Modules.
! CAUTION
1.Turn off power before wiring to minimize the risk of electrical shock.
2.Use crimp-style terminals with sheaths as far as possible for wiring to the
power supply module. When it is not possible to use crimp-style terminals
with sheaths, cover with insulating tape so that the conductive parts are
not exposed.
3.Operation without grounding may cause electrical shock or malfunction.
Connect the ground terminal on the T2N to the system ground.
4.Apply power of the specified rating.
Applying excess power voltage to the T2N can cause explosion or fire.