FM 352 electronic cam controller
Operating Instructions, 05/2011, A5E01071724-03
27
Installing and removing the FM 352
4
Important safety rules
Certain important rules and regulations govern the integrating of an S7-300 with FM 894.08
cm a plant or system. These are described in the Operating Instructions SIMATIC S7-300
CPU 31xC and CPU 31x: Installation
(http://support.automation.siemens.
com/WW/vi
ew/en/13008499).
Rail mounting position
Horizontal installation of the rail is preferable.
For a vertical installation, make allowances for ambient temperature limits (max. 40 °C).
Selecting slots
The FM 352 can be installed in any slot available on the rail for signal modules.
Mechanical configuration
Rules for the layout of the modules on a rack:
1. A maximum of 8 FMs are permitted per tier.
2. The maximum number of modules is restricted by the length of the rail and by the
mounting width of the modules.
FM 352 requires a mounting width of 80 mm.
3. The number of installed modules (SM, FM, CP) is limited by the permitted current
consumption on the S7-300 backplane bus. The current consumption in line 0 (CPU)
must not exceed a total of 1.2 A; the value in the expansion lines 1 to 3 must not exceed
0.8 A each. The current consumption of the FM 352 from the backplane bus can be found
in the Technical data (Page 166) in the appendix.
Installation and removal tools
You require a 4.5 mm screwdriver to install or remove the FM 352.
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