Mitsubishi Electric Melsec A Series User Manual page 3

[DESIGN PRECAUTIONS]
Configure a safety circuit so that the safety of the overall system is maintained even
when an external power error or PLC error occurs.
An accident may occur by a false output or a malfunction.
(1) Outside of the PLC, construct mechanical damage preventing interlock circuits
such as emergency stop, positioning upper and lower limit switches.
(2) During zero return operation, the module is controlled by two data: zero return
direction and zero return speed, and speed begins to decelerate when the near
point dog turns on. If the zero return direction is set incorrectly, the module may
continue to operate without decelerating. To prevent damage to the module in
such cases, configure an interlock circuit outside the PLC.
Do not bunch the control wires or communication cables with the main circuit or
power wires, or install them close to each other.
They should be installed 100 mm (3.9 inch) or more from each other.
Not doing so could result in noise that would cause malfunction.
[INSTALLATION PRECAUTIONS]
Use the PLC in an environment that meets the general specifications contained in
this manual. Using this PLC in an environment outside the range of the general
specifications could result in electric shook, fire, malfunction, and damage to or
deterioration of the product.
Insert the tabs at the bottom of the module into the mounting holes in the base
module, and tighten the screws using the specified torque.
If the module is not properly installed, it may result in malfunctions, failure, or
fallout.
Securely connect a drive unit connector and peripheral connector to the
corresponding connector of the module.
If not attached properly, a contact error may occur, resulting in incorrect input or
output.
Always attach a cover to connectors that are not used. If not covered, malfunctions
may occur.
Do not directly touch the module's conductive parts or electronic components.
Doing so could cause malfunction or failure in the module.
DANGER
CAUTION
CAUTION