3-12
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b
3.2
Wiring the ET 200U Distributed I/O Station
This section discusses the following subjects:
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
You can use one of the following two types of connections to wire the termi-
nal block of a bus unit:
Screw type
Crimp snap–in
Using this wiring method, you can clamp two lines to each terminal point of
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.
Type of Conductor
Permissible Cross Section
Stranded with Core End Sleeves
2
0.5 mm
2
to 1.5 mm
2
(Approximately AWG 20 to
AWG 16)
Solid
2
0.5 mm
2
to 2.5 mm
2
(Approximately AWG 20 to
AWG 14)
M3 Screw
Wire Clamp
Lines
Figure 3-9 Screw–Type Connection
Wiring Methods
Screw–Type Con-
nections
Mechanical and Electrical Configuration
