FM 456-2 Functions and Technical Data
4-3
FM 456-2 Application Function Module Installation, Hardware, and Startup
C79000-G7076-C458-01
General View
Figure 4-1 shows the front and rear view of the FM 456-2 without covering flap.
The positions of the indicators, operator controls and other elements required for
operation can be seen from this figure.
Front elevation Rear elevation
1 = Slot for memory card
2 = Status and fault indicators
3 = Mode selector switch
4 = Slot for interface submodules
5 = Expansion socket
6 = Cover for memory submodule slot
1
2
3
4
4
5
8
6
Figure 4-1 Front and Rear View of an FM 456-2 Without Covering Flap
FM 456-2 Elements
Table 4-2 Elements of the FM 456-2
Element
Function
Mode selector switch The mode selector on the FM 456-2 is in the form of a key switch
(see Section 4.3).
Status and fault
indicators
The status and fault indicators show the operating status of the
FM 456-2 (see Section 4.4).
Module slot for
memory card
A full-size S7 memory card can be inserted in the module slot.
During start-up, the system and user software can be loaded into
working memory from this memory card (see Section 4.5).
Expansion socket M7-400 expansion units can be connected via this expansion
socket (see Section 4.6).
Slots for interface
submodules
Interface submodules can be inserted in these slots (see
Section 4.7).
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