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63
Wiring and Connections
Section 3-4
!WARNING
Connect the ground terminal of the Power Supply Unit to a ground of 100
Ω
or
less when installing the Unit. Not connecting to a ground of 100
Ω
or less may
result in electric shock.
Power Supply Wiring
• To prevent voltage drops caused by startup currents and inrush currents
from other devices, wire the power supply circuits of the CPM2C-S sepa-
rately from power line circuits.
• When using several CPM2C-S PCs together, it is recommended that cir-
cuits are wired separately in order to prevent circuit-breaker malfunctions
and voltage drops due to inrush current.
• Twist power supply lines to prevent noise from the power supply lines.
Noise can further be prevented by wiring via a 1:1 isolation transformer.
• Use wires at least 1.25 mm
2
thick in order to allow for voltage drops and
to keep the current within the allowable level.
!WARNING
Tighten the screws on the terminal block of the AC Power Supply Unit to a
torque of 0.74 to 0.9 N·m. Loose screws may result in burning or malfunction.
The 24-VDC service power supply terminals on the terminal block can be
used for input power supply.
Ground of 100
Ω
or less
100 to 240 VAC
24 VDC
Can be used for input power supply.
Содержание CPM2C-S100C
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