This Is How You Remove An Sme25 And Install It Again - Siemens SINUMERIK 828D Service Manual

Service cases - hardware
4.12 SME20 / SME25
4.12.4

This is how you remove an SME25 and install it again

Overview
The activities that must be taken into account when replacing an SME25 are subsequently
described.
If an SME25 has a hardware defect, then it must be replaced by an identical module.
Preconditions:
● The module is defective and must be replaced.
● The control cabinet is in a no-voltage condition, all of the connectors and cables are
Removing
NOTICE
Electro-static discharge (ESD)
Before you touch the module, discharge yourself at the cabinet or at the ground terminal.
Procedure:
1. Release the encoder connecting cable of the SME25.
2. Withdraw the DRIVE-CLiQ cable from the SME25.
3. Release the protective conductor connection of the SME25.
4. Remove the defective SME25.
Installing
Procedure:
1. Now install the new SME25.
2. Screw on the protective conductor connection.
3. Reconnect the encoder connecting cable.
4. Connect the DRIVE-CLiQ cable.
CAUTION
Cables
The maximum DRIVE-CLiQ cable length is 100 m.
The maximum encoder cable length is 3 m.
In order to guarantee the degree of protection, all of the plug connectors must be correctly
screwed into place or snapped into place.
146
labeled.
Hardware and Software
Service Manual, 03/2010, 6FC5397-5DP20-0BA0