3-21
ET 200L, ET 200L-SC and ET 200L-SC IM-SC Distributed I/O Device
EWA 4NEB 780 6009-02c
You connect the power supply for the electronics to the plug-in, 4-pole
screw-type terminal. The 4L+, 5L+ and 4M, 5M terminals are linked inter-
nally. This enables the power supply to be looped through via the 5L+ and
5M terminals. Insert the screw-type terminal in the appropriate socket on the
IM-SC interface module.
Table 3-5
Assignment of the Power Supply
View
Signal Name
Designation
4L+
DC 24V
5L+
DC 24V (for looping through)
4M
Ground
5M
Ground (for looping through)
You connect the 24V DC power supply to the plug- in, 4-pole screw-type
terminal.
1. Connect the bus line to the screw-type terminal, and press the cover on
the screw-type terminal.
IM-SC
Cover
Figure 3-12 Connecting the Power Supply
2. Insert the screw-type terminal in the appropriate socket on the IM-SC
interface module.
The bus terminating switch allows you to switch bus terminating resistors on
or off. The bus terminating switch is located in a recess on the front of the
IM-SC interface module.
ON
OFF
The bus terminating resistors are activated. The
PROFIBUS-DP terminates at the IM-SC. A data line con-
nected to A
OUT
and B
OUT
is separated.
The bus terminating resistors are deactivated. You can
loop the PROFIBUS-DP through to the IM-SC.
Figure 3-13 Functioning of the Bus Terminating Switch
Power Supply
Connecting the
Power Supply
IM-SC Bus
Terminating
Resistors
Wiring