Table of Contents
Advertisement
Glossary
LAN
Local Area Network: 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.
Legacy USB support
Support of USB devices (e.g. mouse, keyboard) on the USB ports without driver.
License key
The license key represents the electronic license stamp of a license. Siemens provides the
license keys for protected software.
License key disk
The license key disk 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 VAC to 1000 VAC, 70 VDC to 1500 VDC) and not specified in other directives.
Compliance is confirmed by the CE symbol and the EC certificate of conformity.
LPT interface
The LPT interface (Centronics interface) is a parallel interface that can be used to connect a
printer.
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).
196
SIMATIC HMI IPC577C
Operating Instructions, 10/2010, A5E02368074-02
Advertisement
Table of Contents
