Application planning
3.4 Forming potential groups
Distributed I/O system
44
System Manual, 12/2016, A5E03576849-AG
Placement and grouping of I/O modules
Each BaseUnit BU...D that you install in the ET 200SP configuration opens a new potential
group and supplies all subsequent I/O modules (on BaseUnits BU...B) with the necessary
supply voltage. The first 24 V DC I/O module to the right of the CPU/interface module must
be installed on a light-colored BaseUnit BU...D. Exception: If you insert an AC I/O module or
an AI Energy Meter as the first I/O module, the first BaseUnit in the ET 200SP configuration
can be a dark-colored BaseUnit. The requirement is that you use a CPU or IM 155-6 (as of
V3.0).
If you want to place another BaseUnit BU...B after a BaseUnit BU...D, disconnect the power
and AUX buses and open a new potential group at the same time. This allows individual
grouping of the supply voltages.
Do not connect any BaseUnit of the "BU...B" type on the right of a motor starter's BaseUnit
(BU30-MSxx).
Placement and grouping of I/O modules and motor starters
For the potential group (L+/M), the following slot rules apply within the motor starter modules
and other I/O modules of the ET 200SP:
●
An unassembled BaseUnit (BaseUnit with BU cover) must be inserted between the CPU,
an interface module or an I/O module and the motor starter. This is not necessary
between the motor starters.
●
The empty slot can take on the potential (24 V DC) of the potential group on the left of it
(L+, M), i.e. I/O modules and motor starters can be operated in the same potential group.
●
If you would like to insert an I/O module on the right of a motor starter, then use only one
BaseUnit of the BU...D Typ A0 type (light terminal box).
●
The BaseUnits BU30-MS2, BU30-MS4, BU30-MS5 and BU30-MS6 can take on the
potential groups of other BaseUnit types.
However, pay attention to the following exceptions:
–
Only a BaseUnit of type BU30-MS1 or BU30-MS3 may follow an AS-i module
(AS-i potential group).
–
Only BaseUnits with fail-safe motor starters can be connected together in the same
potential group of an F-PM-E.
WARNING
Hazardous Voltage
Can Cause Death, Serious Injury, or Property Damage.
Hazardous electrical voltage can cause electric shock, burns and property damage.
Disconnect your system and devices from the power supply before starting any assembly
tasks.
Summary of Contents for Simantic ET200SP
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