ABB AC 800M, Hardware And Operation

Page: 102 / 230

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.