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Installation Guidelines
Possible Configurations on Mounting Rack ER 701-1
Use expansion mounting rack ER 701-1 to install expansion unit EU 1. EU 1 is suitable for
centralized configurations, i.e., connection to a local central controller of type CC 0, CC 1, CC 2 or
CC 3. The ER 701-1 has nine slots for digital and analog input or output modules and one slot for
an IM 305 or IM 306 expansion unit interface module. Interrupt-triggering modules cannot be
used. The expansion unit gets its power supply via the EU interface module. You can connect up
to three expansion units to one central controller (CC 0/CC 1/CC 2/CC 3) or to one EU 2/3
expansion unit.
Mounting Rack
ER 701-1
Slots
1
Digital Module
2
Analog Module
IM 305/IM 306
1 Input module 434-7 cannot be plugged into these slots.
Digital modules of ES 902 design (S5-135/155U) cannot be plugged in
2 Only if an IM 306 is used.
Analog modules of ES 902 design (S5-135/155U) cannot be plugged in
Figure 3-10. Possible Configurations on Mounting Rack ER 701-1
3-10
0
1
2
3
S5-115U Manual
4
5
6
7
EWA 4NEB 811 6130-02b
8
IM
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