Siemens SIMATIC S5 IP 281 Equipment Manual page 5

Required ESD protective measures are shown in the figure below.
o
b
a
f
— —
5 Measuring and Modifying ESD Modules
Measurements may not be performed on the modules unless
– the measuring device is grounded (e.g., with protective conductor)
or
– the measuring head is briefly discharged (e.g., touching blank metal part
of the controller housing) prior to measuring when using a floating mea-
suring device.
For soldering use only a grounded soldering device.
6 Shipping ESD Modules
As a matter of principle, modules and components must always be stored or shipped in conduc-
tive packaging (e.g., metallized plastic boxes, metal cans).
When packaging is not conductive, the modules must be wrapped in conductive material prior to
packaging. For example, conductive foam rubber, ESD bags, household aluminum foil or paper
can be used (never use plastic bags or foil).
Be sure that the conductive packaging of modules with built–in batteries does not touch or short
circuit the battery connections (if necessary, cover the connections with insulating tape or material
beforehand).
a Conductive floor
b ESD table
c ESD shoes
d ESD shop coat
e ESD bracelet
f Grounding connection of the
cabinets
E – Ill