Siemens Simatic S7-400 - Manual (Page 558)

Interface Submodules
13-62
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Additional Front Cover
The IF 964-DP interface submodule with order number 6ES7964-2AA01-0AB0 has
an additional front cover, which is similar to the front cover of the IF 960HF
synchronization submodule. As long as this second front cover is not screwed on,
the submodule interface on the S7-400 CPU remains off circuit. Only when you
insert an IF submodule and screw on the second front cover, is the submodule
interface on circuit.
When using the submodule in an M7 the additional front cover has no function, it
should, however, be mounted for technical maintenance reasons and due to
improved EMC properties.
Note
Even in an S7-400 CPU you may remove or insert the IF 964-DP interface
submodule only if it is off circuit.
If you remove the front cover of the interface submodule while the power supply is
switched on, the CPU goes into DEFECTIVE mode.
Additional Information
You can find information on “PROFIBUS DP” in the following technical overviews or
manuals:
• Technical overview Distributed I/O in SIMATIC S7 and M7
• Manuals on the DP masters, for example, S7-300 Programmable Controller or
S7-400, M7-400 Programmable Controllers for the PROFIBUS-DP interface of
the S7-300
• Manuals on the DP slaves, for example, ET 200M Distributed I/O Device or
ET 200C Distributed I/O Device
• The manual on the network components SINEC L2/L2FO Network Manual,
such as bus connectors, RS 485 repeaters
• Manuals on STEP 7