Siemens SIMATIC NET PROFIBUS manual Functions

Active Components for Optical Networks

Functions

SAutomatic detection of all PROFIBUS data rates: 9.6 Kbps to 12 Mbps including 45.45 Kbps (PROFIBUS-PA)

SImplementation of the following network topologies:

Bus, star, redundant ring

SHigh availability with redundant media. Distance between two OLMs in the redundant ring limited only by the maximum optical distance.

SAttachment to different types of fiber-optic transmission media (one or two optical interfaces, BFOC connectors)

SIsolated RS-485 interface with segment capability (sub-D female connector)

SUnrestricted multimaster operation:

Extended segmentation function for limiting errors to FO and RS-485 segments

SFast localization of faults:

–Display of the module status via floating signaling contact

–Testing of the FO path quality: Measuring output for optical receiver for logging and detecting the fiber-optic signal quality with a voltmeter.

SHigh cascading depth:

Bus and redundant ring up to 122 OLMs (limited only by monitoring times)

S24 V DC power supply with redundant power supply option.

Note

The optical ports of the OLMs are optimized for greater distances. The direct coupling of the optical ports of an OLM with an OBT or integrated optical ports is not possible due to differences in the technical specifications.

8-6	PROFIBUS Networks SIMATIC NET
	6GK1970-5CA20-0AA1 Release 2 05/2000