xgb, LG
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Safety Instruction
Before using the product …
For your safety and effective operation, please read the safety instructions
thoroughly before using the product.
►
Safety Instructions should always be observed in order to prevent accident
or risk with the safe and proper use the product.
►
Instructions are separated into “Warning” and “Caution”, and the meaning of
the terms is as follows;
This symbol indicates the possibility of serious injury
or death if some applicable instruction is violated
Warning
This symbol indicates the possibility of slight injury
or damage to products if some applicable instruction
is violated
Caution
►
The marks displayed on the product and in the user’s manual have the
following meanings
.
Be careful! Danger may be expected
.
Be careful! Electric shock may occur
.
►
The user’s manual even after read shall be kept available and accessible to
any user of the product
.
Safety Instruction
Safety Instructions when designing
Warning
Please, install protection circuit on the exterior of PLC to protect
the whole control system from any error in external power or PLC
module.
Any abnormal output or operation may cause serious problem
in safety of the whole system.
-
Install applicable protection unit on the exterior of PLC to protect
the system from physical damage such as emergent stop switch,
protection circuit, the upper/lowest limit switch, forward/reverse
operation interlock circuit, etc.
-
If any system error (watch-dog timer error, module installation error,
etc.) is detected during CPU operation in PLC, the whole output is
designed to be turned off and stopped for system safety. However,
in case CPU error if caused on output device itself such as relay or
TR can not be detected, the output may be kept on, which may
cause serious problems. Thus, you are recommended to install an
addition circuit to monitor the output status.
Never connect the overload than rated to the output module nor
allow the output circuit to have a short circuit
, which may cause a
fire.
Never let the external power of the output circuit be designed to
be On earlier than PLC power
, which may cause abnormal output or
operation.
In case of data exchange between computer or other external
equipment and PLC through communication or any operation of
PLC (e.g. operation mode change), please install interlock in the
sequence program to protect the system from any error
. If not, it
may cause abnormal output or operation.
Safety Instruction
Safety Instructions when designing
Caution
I/O signal or communication line shall be wired at least 100mm
away from a high-voltage cable or power line.
If not, it may cause
abnormal output or operation.
Safety Instructions when designing
Caution
Use PLC only in the environment specified in PLC manual or
general standard of data sheet.
If not, electric shock, fire, abnormal
operation of the product or flames may be caused.
Before installing the module, be sure PLC power is off.
If not,
electric shock or damage on the product may be caused.
Be sure that each module of PLC is correctly secured.
If the
product is installed loosely or incorrectly, abnormal operation, error or
dropping may be caused.
Be sure that I/O or extension connecter is correctly secured.
If
not, electric shock, fire or abnormal operation may be caused.
If lots of vibration is expected in the installation environment,
don’t let PLC directly vibrated.
Electric shock, fire or abnormal
operation may be caused.
Don’t let any metallic foreign materials inside the product
, which
may cause electric shock, fire or abnormal operation.
.
Safety Instruction
Safety Instructions when wiring
Warning
Prior to wiring, be sure that power of PLC and external power is
turned off.
If not, electric shock or damage on the product may be
caused.
Before PLC system is powered on, be sure that all the covers of
the terminal are securely closed.
If not, electric shock may be caused
Caution
Let the wiring installed correctly after checking the voltage rated
of each product and the arrangement of terminals.
If not, fire,
electric shock or abnormal operation may be caused.
Secure the screws of terminals tightly with specified torque when
wiring.
If the screws of terminals get loose, short circuit, fire or abnormal
operation may be caused.
*
Surely use the ground wire of Class 3 for FG terminals,
which is
exclusively used for PLC
. If the terminals not grounded correctly,
abnormal operation may be caused.
Don’t let any foreign materials such as wiring waste inside the
module while wiring,
which may cause fire, damage on the product
or abnormal operation
.
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