Siemens SIMATIC ET 200iSP

Power supply of the ET 200iSP
To ensure the consistently high availability in redundancy mode with two identical interface
modules, we recommend additionally setting up the ET 200iSP with a redundant power supply
PS.
See also
Redundancy of the Power Supply (Page 82)
4.11.2 Redundant interface modules
Operating principle
Redundancy on an H system gives you the greatest availability. In case of a failure of an interface
module, the switchover to the redundant interface module takes place without interruption.
Requirements
• H system (e.g. S7-400H)
• Terminal module TM-IM/IM
• Depending on the selected con󹪝guration:
– PROFINET con󹪝guration: 2 x IM 152-1PN (V1.0 and higher) + 2 media converters
– PROFIBUS con󹪝guration: 2 x IM 152-1DP (V2.0 and higher) + 2 RS 485-IS couplers
You can only use the IM 152-1DP in a redundant system on DP masters that support the
"Fail-safe" parameter. On DP masters that do not support this parameter, the IM 152-1DP
does not start and the BF LED 󹪞ashes.
Tip: You recognize in the GSD 󹪝le of the DP master whether it supports "Fail-Safe".
• Software package STEP 7 and SIMATIC S7 H systems
• The H system is completely set up, con󹪝gured and parameterized.
WARNING
SYNC/FREEZE function
The SYNC/FREEZE function must not be enabled in redundant mode. If you do not observe this
condition, invalid process values can occur.
In case of redundancy, there is no synchronization of SYNC/FREEZE commands across lines.
Con󹪝gurations (principle)
4.11 Redundant interface modules in the ET 200iSP
ET 200iSP
80 Operating Instructions, 11/2022, A5E00247483-AK