Modular Profibus Repeaters - Procentec ComBricks User Manual

1.4 Modular PROFIBUS repeaters

The current trend in PROFIBUS projects is to use segmentation with repeaters, fiber optic and ProfiHubs to
bridge the common faults of the end-user concerning his cabling difficulties. ComBricks adds another important
element; the creation of modular and random repeater hubs which can be maintained remotely with a
permanent internal ProfiTrace (see Fig. 1).
ComBricks is based on a backplane which can hold up to 10 hot swap repeater modules. Each module has one
or two channels (so a total of max 20 galvanic isolated transparent segments). Every channel can handle 31
PROFIBUS stations and maximum 1200 m cable length (depends on the baudrate). Fig. 2 illustrates some
configurations.
Each channel has a fail-safe circuit which ensures that the remainder of the PROFIBUS network continues to
operate correctly and that the availability of the installation remains optimal.
The connection of the bus cable allows for a high degree of flexibility as the repeater modules contain both a 9-
pin and screw connector.
It is possible to dynamically exchange equipment during operation. ComBricks is ideal for flow meters, pH
analysers, actuators, drives and especially motor control centres that make use of drawer systems.
Standard repeaters
- 1 Meter rule problems
- Termination problems
- Power supply overload
- Costs and installation time
Fig. 1 - Latest trend in segmentation
ComBricks User Manual v6.4.0 | January 18| © PROCENTEC
ProfiHubs
- 5 fixed channels
- RS 485 only
- No asset management
- Single power supply
COMbricks
ProfiTrace OE
- Modular and hotswap
- ProfiTrace over Ethernet
- Bus redundancy
- DTM, OPC, SNMP, HTTP
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