Glossary
SIMATIC IPC277G
Operating Instructions, 08/2021, A5E50059956-AA
117
Intel VT
The Intel Virtualization Technology (IVT) is the implementation of a secure closed
environment for applications. Special (visualization) software an a VT-capable processor is
required for its use.
Interface
•
Physical interconnection (cable) of hardware elements such as PLCs, PCs, programming
devices, printers or monitors.
•
Interface for interactive software applications.
LAN
L
ocal
A
rea
N
etwork: LAN is a local network that consists of a group of computers and other
devices that are distributed across a relatively restricted range and are linked with
communication cables. The devices connected to a LAN are called nodes. The purpose of
networks is the mutual use of files, printers or other resources.
Legacy Boot Device
Conventional drives can be used as USB devices.
License key
The license key represents the electronic license stamp of a license. Siemens AG issues a
license key for each software that is protected by a license.
License key USB flash drive
The license key USB flash drive contains the authorizations or license keys required to enable
protected SIMATIC software.
Low-voltage directive
EC Product Safety Directive relating to the safety of products which are operated on low
voltage (50 V AC to 1000 V AC, 70 V DC to 1500 V DC) and not specified in other directives.
Compliance is confirmed by the CE symbol and the EC certificate of conformity.
Memory card
Memory cards in credit card format. Memory for user programs and parameters, for example,
for programmable modules and CPs.
Module
Modules are plug-in units for PLCs, programming devices or PCs. They are available as local
modules, expansion modules, interfaces or mass storage (Mass storage module).
