Siemens SIMATIC NET PROFIBUS Owner's Manual page 231

Functions
S Attachment of a PROFIBUS RS-485 segment
S Provides an electrical attachment to the optical PROFIBUS (for example a PG
attachment for commissioning and diagnostics)
S Supports all PROFIBUS transmission rates from 9.6 kbps to 1.5 Mbps and 12
Mbps
S The OBT regenerates the signals in amplitude and time.
S Cascading depth when using user-defined bus parameters up to 126 nodes
S Isolation of the DP node via fiber-optic cable
S Simple diagnostics with LEDs for operating voltage and for data reception CH1,
CH2 and CH3.
Ordering Data:
PROFIBUS OBT
Optical bus terminal for attachment of a
PROFIBUS RS-485 segment to an optical bus
without simplex connector
Operating Instructions
The full Operating Instructions for Optical Bust Terminal OBT are included in the
Appendix of this manual.
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
Active Components for Optical Networks
Order no.
6GK1 500-3AA00
8-3