7 Functional Description of the Fieldbus Modules
7-18
Features of the Redundancy Link Module RLM 01:
• Conversion: line M lines A/B
• For use on Profibus DP/FMS lines
• Automatic line selection
• Transmission rate 9.6 kbauds .... 12 Mbauds
• Communication monitoring
• Repeater functionality
• Redundant power supply
• Power supply monitoring
• Functional electrical isolation of the three serial
RS485 interfaces from each other and from the
power supply.
• Status and error indicators
• Potential-free alarm contact
• Easy mounting on DIN rails
For details about cabling a line redundancy using Redundancy Link Module RLM 01
please refer to Section 4.3, Cabling the fieldbus modules. For more information about
Profibus DP technology, redundancy and installation and the RLM 01 module please
contact your local ABB service center.
7.2.7 Profibus-PA operation
The Profibus module FI 830F is designed exclusively for the connection of Profibus-
DP nodes. If you intend to integrate a Profibus-PA line - i.e. several PA nodes - into
the network, it is recommended to use a linking device LD 800P. The linking device
converts the DP bus physics to PA bus physics. LD 800P is not transparent on the
line, i.e. it is handled as a DP node and has an own DP address. The PA bus is
powered externally via a so-called power conditioner.
The Profibus linking device LD 800P is still under development and will
be available from mid 2002. These specifications are therefore
preliminary and are intended to be used for planning exclusively.
Subject to technical changes without notice!
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