3-1
FM 351 Positioning Function Module
EWA 4NEB 720 6001-02
Installing and Removing the FM 351
Information on the options of mechanical installation and how you must pro-
ceed during the project planning will be found in the manual S7-300 Pro-
grammable Controller, Hardware and Installation.
Only supplementary information is given in the following.
Horizontal mounting in the system on the rail should be preferred.
When mounted vertically, you must pay attention to the restricted ambient
temperatures (max. 40 °C [104°F]).
The FM 351 Positioning Function Module can be mounted at any module
location for signal modules on the rail.
When planning the mechanical installation of your controller, you must ob-
serve the following rules:
1. The maximum number of modules is restricted by the length of the rail
and the width of the modules.
The FM 351 Positioning Function Module needs 80 mm (3.15 in) module
width.
2. The maximum number is restricted by the sum of the current consump-
tions from the 5 V backplane bus supply of all modules to the right of the
CPU.
The current consumption of the FM 351 from the backplane bus is
200 mA. Pay attention to the maximum current consumption from the
backplane bus on the S7-300.
You will find the following subjects in this chapter:
Section Contents Page
3.1 Installing the FM 351 Positioning Function Module 3-2
3.2 Removing the FM 351 Positioning Function Module 3-3
Planning the
Mechanical
Installation
Mounting Position
What Must You
Take into
Consideration
during Mechanical
Installation?
Chapter Overview
3
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