Process Connection; Connection Principles, Fusing And Voltage Distribution - ABB Advant Controller 450 User Manual

2.1.8 Process Connection

2.1.8.1 Connection Principles, Fusing and Voltage Distribution

3BSE 002 415R701 Rev A
Process signal cables are connected to connection units. Connections between I/O boards and
the associated connection units are made with prefabricated ribbon or multi-core cables.
The cables are available in the price list in one standard length. Other lengths up to 15 m (50 ft.)
can be ordered separately. Any marshalling can be distributed accordingly.
There are certain restrictions regarding:
• Internal cable routing
• Signal earthing
• Shield earthing
• Earthing of connection units, mounting rails, cable channels
• Bounding of the marshalling racks (chassis) to the relevant cabinet housing the electronics.
Pay special attention when using non-ABB cabinets.
• An open compartment is not CE-marked.
For further information:
- using ABB standard cabinets, see adequate sections in this installation chapter and the
referred document below for further details if necessary.
- using non-ABB cabinets, see Advant OCS Installation Rules User's Guide for compliance
with the EMC requirements or the general document Interference-free Electronics Design
and Applications.
Advant Controllers are delivered with connection units containing interference-suppression
components and screw terminals for connection of process signals.
Each I/O board is normally provided with a connection unit and the signals are distributed by
dividing the cables entering the cabinet and connecting the separate conductors to different I/O
board's connection units. You can install delivery-adapted cross-couplings in the cabinet,
making it convenient to use the connection units as the board-oriented half of the cross-
coupling. As an alternative there is a series of connection units for object oriented connection.
These facilitate the connection of field cables without using any marshalling or process cable
split-up. An illustration and principal description is given in
Examples of different solutions include standard installation of the connection unit in the
terminal cabinet or installation in open compartments adjacent to the controller system.
However an open compartment is not a CE-marked design.
In addition to terminal blocks for connecting signals, the connection units contain terminal
blocks for supply distribution and fuses. The alternatives available in standard connection units
in the form of extra terminal blocks for 0V and voltage distribution, number of fuses, and so on,
vary among different types and are presented in the S100 I/O Hardware Reference Manual.
The standards optimize function, price and space requirements, for example, a common fuse for
the voltage supply to a group of eight outputs. Individual fusing of objects can be provided for
particular connection units.
You can use a DIN terminal bar with connection terminal blocks and fuses for a particular
application as a supplement to voltage distribution and terminal fusing in connection units.
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Advant Controller 450 User's Guide
Section 2.1.8 Process Connection
Section 1.7.6, Process Interface.
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