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10 abbreviations, Abbreviations – Siemens SIMATIC NET PROFIBUS User Manual

Page 469

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10-1

PROFIBUS Optical Bus Terminal (OBT)
C79000-G8976-C122-02

Abbreviations

DIN

Deutsche Industrie Norm (German industrial standard)

ESD

Electrostatic discharge

EN

European standard

EMC

Electromagnetic compatibility

FO

Fiber–optic

IEEE

Institute of Electrical and Electronic Engineers

ISO/OSI

International Standards Organization / Open System
Interconnection

HCS

t

HCS

t

is a registered trademark of Ensign–Bickford

Optics Company and stands for
“Hard Polymer Cladded Silica Fiber”.
In these instructions, only the
general term PCF is used.

LAN

Local Area Network

LED

Light Emitting Diode

OBT

Optical Bus Terminal

OLM

Optical Link Module

PCF

Polymer Cladded Fiber, synonymous with HCS

t

fiber

POF

Polymer Optical Fiber; synonymous with plastic FO cable

PROFIBUS DP

PROFIBUS Distributed I/Os

SELV

Safety extra–low voltage

UL

Underwriter Laboratories

VDE

Verein Deutscher Elektroingenieure (association of
German electrical and electronics engineers)

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