Installing Modules In A Rack - Siemens SIMATIC S7-400 Hardware And Installation Manual

Installing the S7-400
2.12

Installing Modules in a Rack

Introduction
All modules are installed in a rack using the same procedure.
Caution
!
Modules and racks can be damaged.
If you use force when installing modules in a rack, these components may be
damaged.
Carefully follow the steps described below for the installation sequence.
Tool
The tool needed to install the modules is a cylindrical screwdriver with 3.5 mm
blade width.
Installation Sequence
To install modules in a rack, follow the steps outlined below:
1. Remove the dummy plates from the slots at which you intend to insert modules.
Grasp the dummy plate at the points marked and pull it forward and off.
With double and triple-width modules, you must remove the dummy plates from
all the slots to be covered by the relevant module.
2. Remove the cover, if applicable, from the module (see Figure 2-3).
3. Disconnect the power supply connector at the power supply module.
4. Attach the first module and swing it downwards (see Figure 2-4).
If you feel a resistance when swinging the module down, raise it slightly and
then continue.
5. Tighten the module screws top and bottom with a torque of 0.8 to 1.1 Nm (see
Figure 2-5). Triple-width modules are secured with two screws at the top and at
the bottom.
6. Refit the module cover, if applicable.
7. Fit the remaining modules in the same way.
8. Insert the key into the keyswitch in the CPU when you have installed all the
modules (see Figure 2-6).
The individual steps for installation are explained in the following.
The method of removing modules is described in Chapter 7.
2-28
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S7-400 and M7-400 Programmable Controllers, Installation Manual
C79000-G7076-C424-01