Siemens SIMATIC ET 200SP System Manual page 24

System overview
2.4 Components
Basic component
BU cover
Server module
Coding element
24
Function
Insert the BU cover on the BaseUnits:
Whose slots are not occupied by I/O mod-
•
ules
Whose slots have been reserved for future
•
expansion (as empty slots).
You can keep a reference identification label
for the planned I/O module inside the BU
cover.
There are two versions:
For BaseUnits with a width of 15 mm
•
For BaseUnits with a width of 20 mm
•
The server module completes the configura-
tion of the ET 200SP. The server module
includes holders for 3 spare fuses
(5 × 20 mm).
The server module ships with the
CPU/interface module.
The coding element codes the I/O module
with the BaseUnit.
There are two versions:
Mechanical coding element
•
the coding
Electronic coding element
•
also has an electronic, rewritable memory
for module-specific configuration data
(such as the F-destination address for fail-
safe modules, parameter data for the IO
link master).
①
②
①
: Ensures
②
: This version
Figure
Distributed I/O system
System Manual, 12/2015, A5E03576849-AF