Toshiba nv Series Instruction Manual page 38

Chapter 3 Installation and Wiring
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6F8C1877
Before installing / removing the module, make sure that the
power of the I/O base unit on which the DN912 module
being mounted is OFF
There is a risk of electric shock and malfunction.
Do not touch the internal part of the product.
There is a risk of electric shock.
Install in an environment
specifications.
Do not Install in an environment that does not satisfy the
product operating temperature range.
It may cause malfunction or failure.
Remove static electricity from the human body before
installation and wiring.
It may cause malfunction or failure.
Do not touch the cables unnecessarily.
Applying stress by touching cables or etc.
It may cause malfunction or accident.
When mounting the product on the I/O base unit, do not
break or bend the pins of the TC-net I/O bus connector.
It may cause malfunction or failure.
If it is difficult to insert the module into I/O base unit, when
mounting the module, do not forcibly mount it.
It will be the cause of failure.
according to products