Installation manual

Installing the S7-400
2-34
S7-400 and M7-400 Programmable Controllers Hardware and Installation
A5E00069481-04
5. Tighten the module screws top and bottom with a torque of 0.8 to 1.1 Nm (see
Figure 2-7). 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 2-8).
The individual steps for installation are explained in the following.
The method of removing modules is described in Chapter 7.
Removing the Cover
With modules which have a cover (for example, power supply modules and CPUs),
you remove this before installing the module in the rack. Proceed as follows:
1. Press the locking lever down (1).
2. Swing the cover forward and off (2).
(2)
(1)
Figure 2-5 Removing the Cover