3-2
SM 338 Equipment Manual
(4) J31069-D401-U1-A0-7618
3.1 Mounting
The S7-300 is a programmable control ler which can be equipped with vari-
ous modules to meet the requirements of the particular automation task.
Certain rules apply when positioning the SM 338 on the rail of the S7-300.
S A maximum of 8 signal modules may be placed to the right next to the
CPU.
S The number of modules which can be installed is restricted by their cur-
rent consumption from the S7-300 bus.
Make sure that the total current consumption of all m odules on the rail does
not exceed 1.2 A.
When a vertical setup of the S7-300 is used, the maximum environmental
temperature permitted is reduced from 60° to 40° C.
Table 3-1 shows you which slots can be used for the SM 338.
Table 3-1 Slots for the SM 338
Slot
number
1 2 3 4 5 6 7 8 9 10 11
Rack 1
Rack 2 -
Rack 3 -
Rack 4 -
Module can be
installed.
Module cannot be
installed.
Slot does not exist.
-
The standard precautionary measures as set forth in the ESD guidelines must
be adhered to when handling the module.
Introduction
Position and envi-
ronmental
temperature
Slots
Handling
In
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