Siemens SIMATIC ET 200SP HA System Manual page 45

Configuration
The following figure shows examples for the connection of the IO devices to the H-system.
3
Application planning
Observe the following rules for configuring the IO devices:
Configuration (see
figure under Config‐
uration)
Coupling
Hardware
Mounting rule
ET 200SP HA Distributed I/O system
System Manual, 08/2019, A5E39261167-AD
4
③
System redundancy
(1 subnet)
S2
IO device with 1 interface
module
No special considera‐
tions
4.8 Redundancy and changes during operation
5
④
System redundancy
(2 subnets in a line struc‐
ture)
R 1
Redundant IO device (IO device with 2 interface
modules)
Redundantly used interface modules must be identi‐
cal, i.e. they must have the same article number and
the same hardware version or firmware version.
Plant planning
⑤
System redundancy
+ Media redundancy
(2 subnets in a ring struc‐
ture)
MRP
R 1
45