Mitsubishi Electric C80 Series Instruction Manual page 11

Do not replace the battery while the power is ON.
Read the manual carefully and pay careful attention to safety for the on-line operation (especially program change,
forced stop or operation change) performed by connecting peripheral devices to the CNC CPU module during op-
eration. Erroneous operation may cause machine breakage or accident.
Never try to disassemble or modify modules. It may cause product failure, operation failure, injury or fire.
Use any radio communication device such as a cellular phone or a PHS phone more than 25cm away in all direc-
tions of C80. Failure to do so may cause a malfunction.
Completely turn off the externally supplied power used in the system before installation or removing the module.
Not doing so could result in electric shock, damage to the module or operation failure.
Do not install/remove the module on to/from base unit or terminal block more than 50 times, after the first use of
the product. Mounting/dismounting over 50 times may cause an operation failure.
Do not drop or impact the battery to be installed to the module. That may damage the battery, causing battery liq-
uid to leak in the battery. Do not use the dropped or impacted battery, but dispose of it.
Before touching the unit, always touch a metal with a ground section to discharge any static electricity in the hu-
man body etc. If static electricity is not discharged, the breakdown and the malfunction of the unit are caused.
Do not directly touch the module's conductive parts and electronic components. Touching them could cause an
operation failure or give damage to the module.
Do not touch the heat radiating fins of CNC CPU module while the power is ON and for a short time after the power
is turned OFF. In this timing, these parts become very hot and may lead to burns. Remove the modules with close
attention.
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.
And, ensure to ground a personal computer and a unit with Class D or higher grounding (Ground resistance:
100Ω or less).
(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 pow-
er 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, the extension cable or the bus connection cable of a GOT.
(c) Insert the power plug of the personal computer into the AC outlet.
Before using this product after a long period of storage, performance check must be conducted. Otherwise con-
tact the MTB of your machine tool.
CAUTION
The metal part becomes the high temperature.