Assembling the M7-400
8-13
S7-400 and M7-400 Programmable Controllers Hardware and Installation
A5E00069481-04
8.4.4
Installing Interface Submodules
Installing Interface Submodules
The following modules have card slots to accept interface submodules:
•
CPU 486-3, two card slots
•
CPU 488-3, two card slots
•
EXM 478 expansion module, three card slots.
!
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. Always switch
off the power supply before inserting or removing interface submodules.
!
Caution
Damage to persons and property may occur.
Interface submodules contain electonically-sensitve 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 the interface submodules.
To fit an interface submodule in a card slot of the CPU or expansion module, follow
the steps outlined below:
1. Hold the interface submodule on the long sides of the front plate.
2. Insert the PCB end of the interface submodule in the lower and upper guides of
the card slot, as shown in Figure 8-3.
3. Slowly push the interface submodule into the slot until the front plate rests on
the frame of the card slot.
4. Secure the front plate with the two fitted, captive M2.5 x 10 slot-head screws on
the left frame of the card slot.
