ABB Advant Controller 450 User Manual

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The process cables are connected to screw terminals (terminal blocks) on the connection units
or directly to the I/O units.
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The connection unit consists of a circuit board which is to be located on a mounting bar in the
backplane of the cabinet. See example in Figure 1-18.
You can distribute the connection unit 3 - 15 m if you use shielded cables to join the I/O board.
Mounting bars are available in two models for 19-inch and 24-inch widths.
Connection units have different widths. For dimensions and other technical data, see the6
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A connection unit is provided with terminal blocks to connect external signal cables.
Normally, a connection unit has additional terminals for power distribution to sensors and
actuators. Generally, you can disconnect the terminals individually or group by group to isolate
the I/O channels from the process for fault tracing and test measurements.
Circuits for interference suppression, fuses and, for analog inputs, a shunt resistor, are located
on the connection unit. The shunt resistor is located so that you can replace an analog input
board without breaking any current loops.
A connection unit relates to an I/O board in different ways. The basic arrangement is that one
connection unit corresponds to a specific I/O board. Sometimes two or more connection units
are used to adapt to a single I/O board application. For example, the need of different rated input
voltages to a digital input multi-channel board.
Two I/O boards of different categories (for example, DI and DO) are used to support an object
oriented type of connection unit. An object oriented connection unit facilitates the connection of
field cables without using any marshalling or process cable slit-up. Process objects like motors
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Connection to process
Connection cable
Mounting bar for
connection units
to S100 I/O board in subrack
“Internal Cable”

ABB Advant Controller 450 Specifications

General

Brand	ABB
Model	Advant Controller 450
Category	Controller
Language	English