Mitsubishi Electric C70 Connection Manual page 10

Use wires and cables whose wire diameter, heat resistance level and bending capacity are compatible with the
system.
Ground the device according to the requirements of the country where the device is to be used.
Wire the heat radiating fins and wires so that they do not contact.
When using the RS-232C device as a peripheral device, caution must be paid for connector connection/
disconnection.
Always use a double-OFF type AC power supply switch on the device side, and connect/disconnect the
connector with the AC power supply on the device side OFF.
NC
unit
RS-232C
Be sure to ground the earth terminal FG and LG. Not doing so could result in electric shock or operation failure.
(Ground resistance: 100Ω or less)
When wiring in the unit, be sure that it is done correctly by checking the product's rated voltage and the terminal
layout. Connecting a power supply that is different from the rating or incorrectly wiring the product could result in
fire or damage.
External connections shall be crimped or pressure welded with the specified tools, or correctly soldered.
Imperfect connections could result in short circuit, fire, or operation failure.
Tighten the terminal screws within the specified torque range. If the terminal screws are loose, it could result in
short circuit, fire, or operation failure. Tightening the terminal screws too far may cause damages to the screws
and/or the module, resulting in drop, short circuit, or operation failure.
Be sure there are no foreign matters such as sawdust or wiring debris inside the module. Such debris could
cause fire, damage, or operation failure.
The module has an ingress prevention label on its top to prevent foreign matter, such as wiring debris, from
entering the module during wiring.
Do not remove this label during wiring.
Before starting system operation, be sure to remove this label because of heat dissipation.
When connecting to a personal computer and a unit with the USB interface, an electric shock or a
unit failure may occur.
Operate these correctly according to the manual of a unit and a personal computer.
Observe the following cautions when a personal computer in an AC power supply is used.
(1) For a personal computer that uses a 3-pin power plug or power plug with a ground lead type, make sure to
use a plug socket including a ground input electrode or ground the earth lead, respectively.
(2) For a personal computer that uses a 2-pin power plug without ground lead, make sure to connect the unit
to the personal computer according to the following procedures.
And, it is recommended to supply the same power supply line to a personal computer and the unit.
(a) Pull out the power plug of the personal computer from the AC outlet.
(b) Confirm that the power plug of the personal computer has been pulled out from the AC outlet, and
connect USB cables.
(c) Insert the power plug of the personal computer into the AC outlet.
CAUTION
Switch
Device
AC socket