SIEMENS
3/65
Siemens IK PI · 2015
PROFIBUS
Electrical networks (RS485)
Repeater RS 485 for PROFIBUS
3
■
Overview
•
Automatic detection of transmission rates
•
Transmission rates from 9.6 kbit/s to 12 Mbit/s are possible,
incl. 45.45 kbit/s
•
24 V DC voltage display
•
Indication of bus activity segment 1 and 2
•
The separation of segment 1 and segment 2 by means of
switches is possible
•
Separation of the right segment with an inserted terminating
resistor
•
Decoupling of segment 1 and segment 2 in the case of static
interference
Designed for Industry
•
For increasing the expansion
•
Electric isolation of segments
•
Commissioning support
- Switches for separation of segments
- Bus activity display
- Segment separation in the case of an incorrectly inserted
terminating resistor
In this context, please also note the diagnostics repeater that
provides extensive diagnostics functions for physical line
diagnostics in addition to the normal repeater functionality.
This is described in "Distributed I/O / diagnostics / diagnostics
repeater for PROFIBUS DP".
■
Application
The RS 485 IP20 repeater connects two PROFIBUS or MPI bus
segments using the RS 485 system with up to 32 stations. Data
transmission rates of 9.6 kbit/s to 12 Mbit/s are then possible.
■
Design
•
Housing to degree of protection IP20.
•
2 terminal blocks for connecting the segment
•
Terminal block for supply voltage (24 V DC external).
•
PG/OP interface.
■
Function
Mode of operation
•
Increasing the number of stations (max. 127) and the
expansion
•
Regenerating the signals in amplitude and time
•
Electrical isolation of the connected bus systems
Data transmission rate
Max. segment length
9.6 kbit/s
1 000 m
19.2 kbit/s
1 000 m
45.45 kbit/s
1 000 m
93.75 kbit/s
1 000 m
187.5 kbit/s
1 000 m
500 kbit/s
400 m
1 500 kbit/s
200 m
3 000 kbit/s
100 m
6 000 kbit/s
100 m
12 000 kbit/s
100 m
© Siemens AG 2014