Area Of Application; Led Display; Overview; System" Led - Siemens SIMATIC NET Operating Instructions Manual

2.4

Area of application

PROFIBUS OLMs are designed for use in optical PROFIBUS fieldbus networks. They allow
the conversion of electrical PROFIBUS interfaces (RS-485 level) into optical PROFIBUS
interfaces and vice versa.
The modules can be integrated in existing PROFIBUS fieldbus networks with the known
advantages of optical transmission technology. A complete PROFIBUS fieldbus network can
also be set up with modules in a linear bus, star or ring topology as well as any combination
of these topologies.
To increase the reliability of the fieldbus network, the redundant ring is supported.
2.5

LED display

2.5.1

Overview

The following figure shows the arrangement of the LEDs.
2.5.2

"SYSTEM" LED

LED color LED status
- Off
Green Lit
Optical link module
Operating Instructions, 01/2020, C79000-G8976-C270-06
Meaning
Power supply failed (total failure, in other words with a
•
redundant power supply failure of both supply voltages)
Power supply connected incorrectly
•
Module fault
•
The transmission speed was detected and the power supply
is okay
Description of the device
2.4 Area of application
Signaling contact
Signals
Does not signal
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