Case 3: Simplex - Pepperl+Fuchs HD2-GTR-4PA Manual

Specification
2.5.3

Case 3: Simplex

In the simplex system, both the coupling of DP to PA and the supply of
the four segments are single (simplex). The simplex system consists of
the following components:
• Gateway motherboard MB-FB-GT
• Power Hub motherboard MB-FB-4.GEN
• 1 x HD2-GTR-4PA
• 4 x Power Modules
• 1 x Diagnostic Module
• 1 x Sub-D cable to connect motherboards
Combining a simplex Gateway Motherboard and a redundant Power Hub
Motherboard also makes a fourth combination possible. Pepperl+Fuchs
does not recommend using this arrangement. Since a fault in the cou-
pling of DP to PA results in failure of all four segments together, but the
Note
failure of a single segment does not have any effect on the remaining
segments, increased segment availability can be achieved most easily
with redundant coupling (as described in case 1 and case 2).
Subject to reasonable modifications due to technical advances.
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