Hitachi HSC-2100 Hardware Manual page 32

1 GENERAL INFORMATION
NOTICE
Do not touch any of the modules in the programmable controller when they are in
an energized state. Touching any of the modules in an energized state may
lead to a discharge of static electricity from your body to the module, resulting in
malfunction or breakage of the module. If you have no choice but to touch such
a module, be sure to discharge the static electricity by touching the metal frame
of the cubicle and then touch the module. This is also true when you perform
any of the following actions on a module in its non-energized state: 1) setting a
switch on the module; 2) connecting or disconnecting the cable from the module;
or 3) inserting or removing the connector from the module.
1-9