Selecting Motor Starters With A Suitable Baseunit; Selecting A Baseunit For Motor Starters - Siemens Simantic ET200SP System Manual

Application planning

3.2 Selecting motor starters with a suitable BaseUnit

3.2 Selecting motor starters with a suitable BaseUnit
3.2.1

Selecting a BaseUnit for motor starters

The motor starter BaseUnits "BU30-MS1", "BU30-MS2", "BU30-MS3" and "BU30-MS4" are
compatible with all non-fail-safe motor starters. The motor starter BaseUnits "BU30-MS1",
"BU30-MS2", "BU30-MS3", "BU30-MS4", "BU30-MS5" and "BU30-MS6" are compatible with
all fail-safe motor starters. You will find an overview of available BaseUnits for motor starters
here (Page 32). With the different BaseUnits, you can form different potential groups for the
24 V DC electronics supply (L+/M) and for the AC infeed.
Voltage range
The voltage range of the AC infeed is between 48 V AC and 500 V AC.
Selection criteria for the BaseUnit
The figure below shows the criteria you use to select the appropriate BaseUnit:
Form separate potential groups on the infeed bus for single-phase (L, N, PE) and three-
phase (L1, L2, L3, PE) operation.
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Distributed I/O system
System Manual, 12/2016, A5E03576849-AG