Siemens CPU 410-5H Process Automation - Table 4- 4 Signal Modules for Redundancy

I/O configuration variants
4.7 Connecting redundant I/O to the PROFIBUS DP interface
CPU 410-5H Process Automation/CPU 410 SMART
System Manual, 10/2013, A5E32631667-AA
69
Take into account that you can only use modules of the same product version and same
firmware version as redundant pairs.
Note
PROFINET
The use of redundant I/O at the PROFINET interface is not possible.
A complete list of all modules approved for PCS7 V8.0 SP1 is available at the following
address: SIMATIC Process Control System PCS 7 Approved Modules (V8.0 SP1)
(http://support.automation.siemens.com/WW/view/de/68157377/0/en)
Table 4- 4 Signal modules for redundancy
Module
Order number
Redundant DI dual-channel
DI16xDC 24 V, interrupt
6ES7 321-7BH00-0AB0
DI16xDC 24 V
6ES7 321–7BH01–0AB0
In the event of an error on one channel, t
he entire group (2 channels) is passivated. When using the module with HF index,
only the faulty channel is passivated in the event of a channel error.
Use with non-redundant encoder
• This module supports the "wire break" diagnostic function. To implement this function, make sure that a total current
between 2.4 mA and 4.9 mA flows even at signal state "0" when you use an encoder that is evaluated at two inputs in
parallel.
You achieve this by connecting a resistor across the encoder. Its value depends on the type of switch and usually
ranges between 6800 and 8200 ohms for contacts.
For BEROS, calculate the resistance based on this formula:
(30 V/(4.9 mA – I_R_Bero) < R < (20 V/(2.4 mA – I_R_Bero)
DI16xDC 24 V
6ES7 321-1BH02-0AA0
In some system states, it is possible that an incorrect value of the first module is read in briefly when the front connector of
the second module is removed. This is prevented by using series diodes like those shown in figure C-3.
DI32xDC 24 V
6ES7 321-1BL00-0AA0
In some syste
m states, it is possible that an incorrect value of the first module is read in briefly when the front connector of
the second module is removed. This is prevented by using series diodes like those shown in figure C-4.
DI 8xAC 120/230V
6ES7 321-1FF01-0AA0
DI 4xNamur [EEx ib]
6ES7 321-7RD00-0AB0
You cannot use the module in redundant operation for applications in hazardous areas.
Use with non-redundant encoder
• You can only connect 2-wire NAMUR encoders or contact makers.
• Equipotential bonding of the encoder circuit should always be at one point only (preferably encoder negative).
•
When selecting encoders, compare their properties with the specified input characteristics. Remember that this function
must always be available, regardless of whether you are using one or two inputs. Example of valid values for NAMUR
encoders: for "0" current > 0.2 mA; for "1" current > 4.2 mA.