Assembling the M7-400
8-47
S7-400 and M7-400 Programmable Controllers Hardware and Installation
A5E00069481-04
8.8.1
Replacing an Interface Module
Removing an Interface Submodule
You can replace an interface submodule without needing to remove the
corresponding CPU or expansion module from the rack. Proceed according to the
following sequence:
!
Warning
The modules can be damaged.
When inserting or removing interface submodules with power applied, the CPU
and expansion modules as well as the interface submodules can be damaged.
Never insert or remove interface submodules with power applied. Before inserting
or removing interface submodules, always disconnect the power supply from the
AC supply. Observe the ESD guidelines.
!
Caution
There is a risk of personal injury and damage to property.
Interface modules contain electrostatically sensitive components that may be irre-
parably damaged if touched.
The surface temperature of the components can reach as high as 70
°
C, which
means there is a risk of you burning yourself. You should therefore always hold the
interface modules by the long sides of the front plate.
Always adhere to the guidelines for electrostatically sensitive components (ESD)
when installing the interface modules.
1. Switch the CPU and all function modules in your M7-400 to STOP with the
mode switch.
2. Switch off the load voltage for the modules.
3. Disconnect the automation computer from the supply.
4. Loosen the screws of the subminiature D connectors and disconnect all
connectors.
5. Loosen the two captive slot-head screws which secure the front plate of the
interface submodule to the left frame of the card slot, until the front plate can be
pulled out about 6 mm.
6. Carefully withdraw the interface submodule from the guide of the card slot (see
Figure 8-21).
