Removing And Inserting Modules - Siemens S5-135U/155U System Manual

9.7.5

Removing and Inserting Modules

Warning
!
When removing and inserting the front connector during operation,
hazardous voltages of more than 25 V AC or 60 V DC may be present at the
module pins. When this is the case at the front connector, live modules may
only be replaced by electrical specialists or trained personnel in such a way
that the module pins are not touched.
During operation, the front connector and module must not be removed or
inserted without the enable jumper or active enable circuit.
Install an analog output module as follows:
Step
1
2
3
4
5
System Manual
C79000-G8576-C199-06
Action
Release the upper locking bar on the subrack and swivel it upwards and
out.
Insert the module at the desired slot in the subrack and push it back in the
guides.
Latch the module by rotating the locking pin by 90
the module. It must no longer be possible to pull the module forwards.
Engage the front connector on the support pin of the module.
The width of the support pin also provides keying to prevent front con-
nectors from being fitted to the wrong modules (e.g. front connectors with
115/230 V AC wiring cannot be plugged into analog modules).
Tighten the screw in the upper part of the front connector.
Analog Input/Output Modules
o
at the lower end of
9-105