Replacing Interface Submodules - Siemens S7-400 Installation Manual

Maintenance
7.12

Replacing Interface Submodules

Available Interface Submodules
Note
Only use interface submodules that are explicitly released for use in S7-400
devices.
Installing Interface Submodules
Warning
!
The modules can be damaged.
When inserting or removing interface submodules with power applied, the CPU
and interface submodules can be damaged (exception: using synchronization
submodules in an H system).
Never insert or remove the interface submodules while power is being supplied
(exception: synchronization submodules). Always switch off the power supply
before inserting or removing interface submodules.
Caution
!
Danger of damage to persons and property.
Interface submodules contain electronically-sensitive components that may be
damaged if they are touched.
The surface temperatures on the components can reach up to 70
risk of burning.
For this reason, you should always hold the interface submodules on the longest
sides of the front panel.
Observe the ESD guidelines when installing interface submodules.
7-22
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