P R O F I B U S P
O W E R
H
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E G M E N T
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O U P L E R
Specification
Subject to reasonable modifications due to technical advances.
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provide redundant coupling. The HD2-GTR-4PA supports PROFIBUS
„Flying Redundancy“ as well as all non-redundant masters.
Power modules HD2-FB*
Power Modules supply electrical power to segments. They couple the
supply current to the two-wire Fieldbus cable while maintaining the high-
est signal quality.
Diagnostic modules HD2-DM*
Diagnostic modules are divided into the Basic Diagnostic Module HD2-
DM-B and the Advanced Diagnostic Module HD2-DM-A. The diagnostic
modules provide various system diagnostics.
2.5
Recommended System Combinations
2.5.1
Case 1: Fully Redundant
In the fully redundant system, both coupling of PROFIBUS DP to
PROFIBUS PA and the supply of the four segments are designed red-
undantly. The fully redundant PROFIBUS Power Hub consists of the fol-
lowing components:
•
Gateway motherboard MB-FB-GTR
•
Power Hub motherboard MB*-4R.GEN
•
2 x HD2-GTR-4PA
•
8 x Power Modules
•
1 x Diagnostic Module
•
1 x Sub-D cable to connect motherboards
The fully redundant system offers the highest protection against indivi-
dual failures or failure of all PA segments of PROFIBUS.
2.5.2
Case 2: Redundant Coupling
In this case, coupling is designed redundantly, but there is only one
supply per segment (simplex). The redundantly coupled system con-
sists of the following components:
•
Gateway motherboard MB-FB-GTR
•
Power Hub motherboard MB-FB-4.GEN
•
2 x HD2-GTR-4PA
•
4 x Power Modules
•
1 x Diagnostic Module
•
1 x Sub-D cable to connect motherboards
Redundant coupling ensures communication of the four PA segments.
Failure of one segment has no effect on the other three segments.