Siemens SINUMERIK 828D Service Manual page 104

Service cases - hardware
4.5 I/O modules
Removing
Figure 4-18
NOTICE
Electro-static discharge (ESD)
Before you touch the module, discharge yourself at the cabinet or at the ground terminal.
Procedure:
1. Switch-off the control: Completely switch off the system. Check that the system is in a no-
2. Access the control cabinet where the module is located.
3. Using a multimeter, check the X1 power supply to ensure that the system really is in a no-
4. If it has not already been done, label all connectors that lead to the module now. Only
5. Withdraw the power supply X1.
6. Release the connectors of the ribbon cables (X111, X222, X333) on the module that are
7. Remove the strain relief of the communication cables to interfaces X2.
104
Rear of PP 72/48D 2/2A PN
voltage condition and is locked-out so that it cannot be switched on again without the
appropriate authorization.
voltage condition.
then, can it be ensured that the cables are not interchanged.
used to connect the digital inputs and outputs.
Hardware and Software
Service Manual, 03/2010, 6FC5397-5DP20-0BA0