Mitsubishi QJ71PB92V-U-HW User Manual page 4

[Design Precautions]
When the QJ71PB92V is mounted in a redundant system, set the watchdog
timer for DP-Slaves so that the calculation formula shown in PROFIBUS-DP
Master Module User's Manual. If the formula is not satisfied, a watchdog timer
error occurs in DP-Slaves during system switching.
Do not bunch PROFIBUS cables with the main circuit or power wires, 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 erroneous operation.
[Installation Precautions]
Use the programmable controller under the environment specified in the
user's manual of the CPU module to be used.
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.
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 malfunction, failure or drop.
When using the programmable controller in the environment of much
vibration, tighten the module with a screw.
Tighten the screw in the specified torque range.
Undertightening can cause a drop, short circuit or malfunction.
Overtightening can cause a drop, short circuit or malfunction due to damage
to the screw or module.
Completely turn off the externally supplied power used in the system before
mounting or removing the module.
Not doing so could result in damage to the product.
DANGER
CAUTION
CAUTION
A-3