KEB C6 COMPACT 3 Instructions For Use Manual page 62

Glossary
IDE
Integrated Development Environment
IEC 61131-2
Programmable controllers - Part 2: Equipment re-
quirements and tests (German version DIN EN
61131-2)
IEC 61131-3
Programmable controllers - Part 3: Programming
languages (German version DIN EN 61131-3)
NHN
Standard altitude zero; related to the established
height definition in Germany (DHHN2016). The in-
ternational data usually deviate from this by only a
few cm to dm, so that the value is given can be
taken from the regionally applicable definition.
PELV
Safe protective extra-low voltage (earthed).
RS485
RS-485 is an industry standard according to
EIA-485 for a physical interface for asynchronous,
serial data transmission.
RTC
Real Time Clock
SELV
Safe extra-low voltage (unearthed).
UPS
Uninterruptible power supply for bridging power
failures or to bring the device into a defined state.
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KEB Automation KG
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