Central Controllers And Expansion Units - Siemens S5-155U System Manual

Connecting the EU 184U and
EU 187U
Connecting the EU 183U,
EU 185U
Connecting the ER 701-1
Addressing
System Manual
C79000-B8576-C199-03
For one IM 300-5, you can connect up to three EUs to a CC or EU in
distributed arrangement (see Figures 7-5 and 7-6). The EUs are
supplied with operating voltage via the IMs. The last IM 312-5
requires no terminator.
Note
The maximum permissible current over each connection of the
IM 300-5CA11 is 5 A.
You can connect up to four EUs to each IM 300-3. The last IM 312-3
requires a terminator.
You can connect up to three ERs to each IM 300-5L (-5LB11). The
ERs are supplied with operating voltage via the IMs.
Note
The maximum permissible current over each connection of the
IM 300-5LB11 is 2 A.
The connection of central controller and expansion unit to the
IM 300-5LB11 is provided exclusively by the 705-0 connecting cable.
It is available in two lengths: 0.5 m and 1.5 m (refer to the ordering
information for order numbers).
When the IM 300s are used in the S5-135U/155U PLC, the
input/output modules can be addressed in the normal (P) and extended
(O) areas.
You may only set module addresses in the EU which are not used in
the CC. This applies to both areas.
The 300 and 312 Interface Modules
7
7 - 5