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Mechanical and Electrical Configuration
3.2
Wiring the ET 200U Distributed I/O Station
This section discusses the following subjects:
Wiring Methods
You can use one of the following two types of connections to wire the termi-
nal block of a bus unit:
Screw–Type Con-
Using this wiring method, you can clamp two lines to each terminal point of
nections
a bus unit. To screw them tight, it is best to use a screw driver with a blade
that is 5 mm (approximately 3/16 in.) wide. Figure 3-9 illustrates a screw–
type connection. The following table lists the permissible cross sections of
lines you can connect to this type of terminal.
Figure 3-9 Screw–Type Connection
3-12
How to connect lines to the terminal block of an ET 200U slave station
(using screw–type or crimp snap–in terminals)
How the power supply modules are connected to the main power
How to connect digital modules
Screw type
Crimp snap–in
Type of Conductor
Stranded with Core End Sleeves
Solid
Permissible Cross Section
2
2
2
0.5 mm
to 1.5 mm
(Approximately AWG 20 to
AWG 16)
2
2
2
0.5 mm
to 2.5 mm
(Approximately AWG 20 to
AWG 14)
M3 Screw
Wire Clamp
Lines
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b
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