General Information
H-2
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
IR Infrared
LAN Local Area Network
LED Light Emitting Diode
MPI Multipoint Interface
NRZ Non Return to Zero
OBT Optical Bus Terminal
OLM Optical Link Module
OP Operator Panel
PCF Polymer Cladded Fiber
PE Polyethylene
PG Programming device
PMMA Polymethylmethacrylate
PNO PROFIBUS User Organization
POF Polymer Optical Fiber
PROFIBUS–DP PROFIBUS distributed I/Os
PROFIBUS–PA PROFIBUS Process Automation
PTB Physikalisch–Technische Bundesanstalt (German official body)
PUR Polyurethane
PVC Polyvinylchloride
SELV Safety Extra–Low Voltage (to EN 60950)
UL Underwriter Laboratories
UV ultraviolet
V Value factor
VDE Verein Deutscher Elektroingenieure (association of German electronics engineers)
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