Rc Network With 1 Mω For Configuration With Ungrounded Reference Potential - Siemens SIMATIC ET 200M Operating Instructions Manual

Compatibilities between the IM 153-x
A.3 RC Network with 1 MΩ for Configuration with ungrounded reference potential
A.3 RC Network with 1 MΩ for Configuration with ungrounded
reference potential
The principle of the ET 200M structure with ungrounded reference potential can be found in
chapter "Configuration of an ET 200M with ungrounded reference potential (Page 54)".
IM 153-x with a resistance of 1 MΩ
The following IM 153-x have in the RC network a resistance of 1 MΩ:
• IM 153-1
up to and including 153-1AA02, version 07
up to and including 153-1AA82, version 06
• IM 153-2
up to and including 153-2AA01, version 02
①
The following applies for this IM 153-x:
Maximum 18 nodes can be operated on the PROFIBUS DP in an unearthed structure on a
power supply.
With more than 18 nodes you must use an additional power supply.
Subsequent Versions
All later versions have a resistance of 10 MΩ in the RC network.
246
Ground bus
Operating Instructions, 04/2022, EWA-4NEB7806006-09
ET 200M