Product specifications

Section 3 Configuration Power Supply System
3BSE036351-510 A 173
Power Supply System
The configuration of a power supply system for an AC 800M controller is very
straightforward.
Configurations
Figure 61 on page 177 and Figure 62 on page 178 gives a series of simple circuit
diagrams showing various possibilities for connecting the incoming mains power –
via the mains breaker, the power supply units and the SS83X voting devices – to the
24 V DC distribution terminals.
The AC 800M Controller and its I/O system are normally located in one or several
enclosures or cabinets. The cabinet housing the AC 800M Controller can also
contain I/O units connected to the controller via the electrical ModuleBus, the
optical ModuleBus or the communication interfaces for PROFIBUS DP.
Cabinet Containing AC 800M Controller
From this cabinet power may be required for:
• Powering Units: power to the electronic circuitry for each unit in the cabinet.
• Powering Field Equipment: power to equipment, relay contacts etc. located
outside the cabinet, but connected to the inputs/outputs of the I/O units in the
cabinet.
Cabinet Containing I/O System
Use the recommendations given above if no other information is given in the I/O
system documentation.
It is strongly recommended to:
• use a power supply in each cabinet for Powering Units (only when cabinets
are mounted side by side, and the maximum cable length is less than 10
m,
can power to the units be taken from another cabinet)
• use separate power supplies for Powering Units (including S800 cluster
modems) and Powering Field Equipment