Installing the CEX-Bus Interconnection Unit BC810/TP857 Section 2 Installation
98 3BSE036351-510 A
See Figure 31 on page 100 and Figure 32 on page 101 for configuration examples.
Use the configuration which coincides with the requirements for availability,
redundancy and safety of your AC 800M controller system.
The BC810 is powered either from the processor unit via the CEX-Bus or through
its external connector for power supply. This external connector can also support the
CEX-Bus with redundant power.
If the external connector is used in a redundant configuration of BC810, there are
two valid connection possibilities:
• Single power source (SD8xx or SS8xx) for the processor units and the BC810s
on both the segments (say, segments A and B). See
Figure 33 on page 102.
• One power source (SD8xx or SS8xx) for the processor unit on segment A and
the BC810 on segment B, and another power source (SD8xx or SS8xx) for the
processor unit on segment B and the BC810 on segment A. See
Figure 34 on
page 103.
Do not connect the two CEX-Bus segments, separated with BC810, to each other
with CEX-Bus extension cable TK850.
For obtaining redundant power supply, connect the external connector to the
SS82x voting device. For details of SS82x connections, see
Installing the
SS823/SS832 Voting Unit on page 136. See also Powering from an External
Source on page 176.
In AC 800M High Integrity Controllers it is required that the external supply
input of BC810 is connected and that the power supply is strictly configured
either according to
Figure 33 or according to Figure 34 and nor is it allowed to
change the configuration by way of for instance individual circuit breakers
between modules.
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