Siemens SIMATIC MOBY D System Manual page 344

Glossary
Dynamic mode
In dynamic mode, the data carrier moves past the write/read device at a traversing rate
which depends on the configuration. Various checking mechanisms (CRC, etc.) ensure
error-free data transfer even under extreme environmental conditions. A serial connection
(up to 300 m) is used to connect the write/read device directly to an interface module, PC, or
any other system.
Electromagnetic compatibility
Electromagnetic compatibility is the ability of an electrical or electronic device to operate
satisfactorily in an electromagnetic environment without affecting or interfering with the
environment over and above certain limits.
EMC directive
Guidelines for electromagnetic compatibility This guideline relates to any electrical or
electronic equipment, plant or system containing electric or electronic components.
Equipotential bonding
Potential differences between different parts of a plant can arise due to the different design
of the plant components and different voltage levels. It is necessary to compensate for these
differences by equipotential bonding. this is done by combining the equipotential bonding
conductors of power components and non-power components on a centralized equalizing
conductor.
ESD directive
Directive for handling ESDs.
Interface modules (ASM)
See communication modules
Limit distance
The limit distance is the maximum clear distance between the upper surface of the write/read
device and the transponder, at which the transmission can still function under normal
conditions.
Metal-free area
Distance/area which must be maintained between the transponder and metal in order to
prevent interference during data transfer between the transponder and write/read device.
Mobile data storage units (MDS)
See transponder
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System Manual, 01/2010, J31069-D0147-A6-7618
MOBY D