8
[Startup and Maintenance Precautions]
WARNING
● Do not touch any terminals while the programmable controller's power is on. Doing so may cause
electric shock or malfunctions.
● Before cleaning or retightening terminals, cut off all phases of the power supply externally. Failure to
do so in the power ON status may cause electric shock.
● Before modifying a program in operation, forcible output, running or stopping a programmable
controller, read through this manual carefully, and ensure that the operation is safe before proceeding.
An operation error may damage the machinery or cause accidents.
● Do not change the program in a programmable controller from two or more peripheral equipment
devices such as an engineering tool or a GOT at the same time. Doing so may cause destruction or
malfunction of the programmable controller program.
● Safety-oriented devices must be suitable for safety related signals.
A function interruption of safety outputs results in a loss of the safety functions so that the risk of
serious injury exists.
Do not connect any loads that exceed the rated values of the safety outputs.
Wire the safety extension module so that 24 VDC signals cannot unintentionally contact safety
outputs.
Connect the GND wires (ground cable) of a power supply to earth so that the devices do not switch on
when the safety output line is applied to the frame potential.
Use suitable components or devices that fulfill all the applicable regulations and standards.
Actuators at the outputs can be wired as single channel. In order to maintain the respective safety
integrity levels, the lines have to be routed in such a manner that cross circuits to other live signals
can be excluded, for example by routing them within protected areas such as in a control panel or in
separate sheathed cables.
● If an error occurs due to an accident or damage, stop the system operation immediately and ensure
the safety. Investigate and resolve the causes to run the system again.
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