Siemens Automation System S7-400 - Manual (Page 167)

Maintenance
7-19
Automation System S7-400 Hardware and Installation
A5E00850741-01
7.11 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 o C and there is a
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.