Table 10-2 Signal Modules For Channel-Oriented Redundancy - Siemens SIMATIC S7-400H System Manual

Hardware configuration and project engineering of the redundant I/O
Follow the steps below to use redundant I/O:
1. Insert all the modules you want to operate redundantly. Remember the following basic
2. Configure the module redundancy using HW Config in the object properties of the
3. Either browse for a partner module for each module, or accept the default settings
4. Enter the remaining redundancy parameters for the input modules.
Signal modules for redundancy
The signal modules listed below can be used in channel-oriented redundancy.
Table 10-2
Module
DI16xDC 24 V as of product version 2
In the event of an error on one channel, the entire group (2 channels) is passivated.
DO 16xDC 24 V/0.5 A
DO 10xDC 24 V/2 A as of product version 3
AI 8x16Bit as of product version 10
AI 8x0/4...20 mA HART
AO8x12 Bit as of project version 5
AO 8x0/4...20 mA HART
S7-400H
System Manual, 09/2007, A5E00267695-03
rules for project engineering.
relevant module.
In a centralized configuration: If the module is in slot X of the even-numbered rack, the
module at the same slot position in the next odd-numbered rack is proposed.
If the module is in slot X of the odd-numbered rack, the module at the same slot position
in the previous even-numbered rack is proposed.
Distributed configuration in a one-sided DP slave: If the module is inserted in slot X of the
slave, the module at the same slot X of the slave at the same PROFIBUS address in the
partner DP subsystem is proposed, provided the DP master system is redundant.
Distributed configuration in a switched DP slave, stand-alone mode: If the module in the
slave with a DP address is inserted in slot X, the module in the slave with the next
PROFIBUS address at slot X is proposed.
NOTICE
Always switch off power to the station or rack before you remove a redundant digital
input module that does not support diagnostics functions and is not passivated. You
might otherwise passivate the wrong module. This procedure is necessary, for example,
when replacing the front connector of a redundant module.
Redundant modules must be in the process image of the inputs or outputs. Redundant
modules are always accessed using the process image.
When using redundant modules, select the "Cycle/Clock Memory" tab from
"HW Config -> Properties CPU 41x-H" and set the following:
"OB 85 call on I/O access error > Only incoming and outgoing errors"
Signal modules for channel-oriented redundancy
Using I/Os in S7-400H
10.5 Connecting redundant I/Os
Order number
6ES7 321–7BH01–0AB0
6ES7 322–8BH01–0AB0
6ES7326–2BF01–0AB0
6ES7 331–7NF00–0AB0
6ES7 331–7TF01-0AB0
6ES7 332–5HF00–0AB0
6ES7 332–8TF01-0AB0
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