ABB AC 800M

Power Supply System Section 3 Configuration
102 3BSE 027 941 R301
Power Supply System
The configuration of a power supply system for an AC 800M controller is very
straightforward.
Configurations
Figure 31 on page 106 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 SS822 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 and
PROFIBUS DP-V1.
Cabinet containing the 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.
It is strongly recommended to:
• use a power supply in each cabinet for Powering Units (only when cabinets are
mounted side by side can power to the units be taken from another cabinet)
•use separate power supplies for Powering Units and Powering Field
Equipment (see Figure 24 on page 88 and Figure 25 on page 89).
Cabinet containing I/O system
Use the recommendations given above if no other information is given in the I/O
system documentation.