User's Manual

Table Of Contents
DIB-500 R4.1 Component replacement
Replacing the top hat rail – optional (redundancy package)
190 Installation, Operation and Service Manual 90DIB500R41IM_FCC02 99.1
2. Pull the component slightly forward and then upwards off the top hat rail.
3. Remove all the connected cables.
The removal of the LRU has thus been completed.
11.6.2 Inserting the LRU
The procedure corresponds to the description in section 5.5.1.3 on page 102.
11.7 Replacing the top hat rail – optional (redundancy
package)
The top hat rail power supply unit is used for the voltage supply of the LRU. For this pur-
pose, the top hat rail power supply unit is connected with the LRU and the terminal
block using two power supply cables.
The tasks listed in the following table must be performed to replace the top hat rail
power supply unit.
Figure 11.11 shows the top hat rail power supply unit on the top hat rail and additional
components. The following table describes these indicators in detail.
Figure 11.11 Top hat rail power supply unit on the top hat rail
Table 11.20 Overview of the tasks to be performed (Replacing the top hat rail – optional (redundancy package))
Tasks/work steps Described in
Preparatory measures Temporary service interruption Section 8.1 on
page 163
Removing the top cover of the mounting frame Section 5.4 on
page 94
Removing the top hat rail power supply unit Section 11.7.1
on page 191
Connecting voltage supply cables to the top hat rail power supply unit on page 100
Installing the top hat rail power supply unit Section 11.7.2
on page 192
Concluding tasks Mounting the top cover of the equipment rack Section 5.13
on page 129
Recommissioning after a temporary service interruption Section 9.1 on
page 167
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