Mitsubishi QS03NB-U-HW User Manual

Mitsubishi Safety Programmable Controlle

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Safety Guideline

Thank you for purchasing the Mitsubishi safety programmable
controller MELSEC-QS Series.

Prior to use, please read both this manual and detailed manual
thoroughly and familiarize yourself with the product.

MODEL QS03NB-U-HW

MODEL

CODE

IB(NA)-0800424-B(0809)MEE

13JY84

© 2008 MITSUBISHI ELECTRIC CORPORATION

SAFETY PRECAUTIONS

(Always read these instructions before using this equipment.)

Before using the product, please read this manual, the relevant manuals
introduced in this manual, standard programmable controller manuals, and the
safety standard carefully and pay full attention to safety to handle the product
correctly.
In this manual, the safety instructions are ranked as "DANGER" and "CAUTION".

Indicates that incorrect handling may cause

DANGER

CAUTION

hazardous conditions, resulting in death or severe
injury.

Indicates that incorrect handling may cause
hazardous conditions, resulting in medium or slight
personal injury or physical damage.

Note that the level may lead to a serious consequence
according to the circumstances.
Always follow the instructions of both levels because they are important to
personal safety.

Please save this manual to make it accessible when required and always forward
it to the end user.

CAUTION

A-1

[Design Precautions]

DANGER

z When a safety programmable controller detects an error in an external power

supply or a failure in programmable controller main module, it turns off all the
outputs. Create an external circuit to securely stop the power of hazard by
turning off the outputs.Incorrect configuration may result in an accident.

z Create short current protection for a safety relay, and a protection circuit such

as a fuse, and breaker, outside a safety programmable controller.

z When data/program change, or status control is performed from a PC to a

running safety programmable controller, create an interlock circuit outside the
sequence program and safety programmable controller to ensure that the
whole system always operates safely.
For the operations to a safety programmable controller, pay full attention to
safety by reading the relevant manuals carefully, and establishing the
operating procedure.
Furthermore, for the online operations performed from a PC to a safety CPU
module, the corrective actions against a communication error due to a cable
connection fault, etc. should be predetermined as a system.

z All output signals from a safety CPU module to the CC-Link Safety system

master module are prohibited to use. These signals can be found in the
CC-Link Safety System Master Module User's Manual.
Do not turn ON or OFF these signals by sequence program, since turning ON/
OFF these output signals of the programmable controller system may cause
malfunctions and safety operation cannot be guaranteed.

z When a safety remote I/O module has detected CC-Link Safety error, it turns

off all the outputs. Note that the outputs in a sequence program are not
automatically turned off. If CC-Link Safety error has been detected, create a
sequence program that turns off the outputs in the program. If the CC-Link
Safety is restored with the outputs on, it may suddenly operate and result in
an accident.

z To inhibit restart without manual operation after safety function was performed

and outputs were turned OFF, create an interlock program which uses a reset
button for restart.

A-2

[Design Precautions]

CAUTION

z Do not bunch the wires of external devices or communication cables together

with the main circuit or power lines, or install them close to each other.
They should be installed 100 mm (3.94 inch) or more from each other.
Not doing so could result in noise that would cause malfunctions.

[Installation Precautions]

CAUTION

z Use a safety programmable controller in the environment that meets the

general specifications described in this manual.
Using this programmable controller in an environment outside the range of the
general specifications could result in electric shock, fire, erroneous operation,
and damage to or deterioration of the product.

z While pressing the installation lever located at the bottom of module, insert the

module fixing tab into the fixing hole in the base unit until it stops. Then,
securely mount the module with the fixing hole as a supporting point.
Incorrect loading of the module can cause a failure or drop.
Secure the module to the base unit with screws.
Tighten the screw in the specified torque range.
If the screws are too loose, it may cause a drop of the screw or module.
Over tightening may cause a drop due to the damage of the screw or module.

z Completely turn off the external supply power used in the system before

mounting or removing the module.
Not doing so could result in damage to the product.

z Do not directly touch the module's conductive parts or electronic components.

Doing so may cause malfunctions or a failure.

A-3

[Wiring Precautions]

DANGER

z Be sure to shut off all phases of the external supply power used by the system

before wiring.
Not completely turning off all power could result in electric shock or damage to
the product.

z When energizing or operating the module after installation or wiring, be sure

to close the attached terminal cover.
Not doing so may result in electric shock.

A-4

[Wiring Precautions]

CAUTION

z Ground the FG and LG terminals correctly.

Not doing so could result in electric shock or malfunctions.

z Use a solderless terminal with insulation sleeve for wiring of a terminal block.

Use up to two solderless terminals for a single terminal.

z Use applicable solderless terminals and tighten them with the specified

torque.
If any solderless spade terminal is used, it may be disconnected when the
terminal screw comes loose, resulting in a failure.

z Wire the module correctly after confirming the rated voltage and terminal

layout.
Connecting a power supply of a different rated voltage or incorrect wiring may
cause a fire or failure.

z Tighten a terminal block mounting screw, terminal screw, and module

mounting screw within the specified torque range.
If the terminal block mounting screw or terminal screw is too loose, it may
cause a short circuit, fire, or malfunctions.
If too tight, it may damage the screw and/or the module, resulting in a drop of
the screw or module, a short circuit or malfunctions.
If the module mounting screw is too loose, it may cause a drop of the screw or
module.
Over tightening the screw may cause a drop due to the damage of the screw
or module.

z Be sure there are no foreign substances such as sawdust or wiring debris

inside the module. Such debris could cause a fire, failure, or malfunctions.

z The module has an ingress prevention label on its top to prevent foreign

matter, such as wire offcuts, from entering the module during wiring.
Do not peel this label during wiring. Before starting system operation, be sure
to peel this label because of heat dissipation.

z Install our programmable controller in a control panel for use.

Wire the main power supply to the power supply module installed in a control
panel through a distribution terminal block.
Furthermore, the wiring and replacement of a power supply module have to
be performed by a maintenance worker who acquainted with shock protection.
(For the wiring methods, refer to the QSCPU User's Manual (Hardware
Design, Maintenance and Inspection).)

A-5