Siemens S5-135U/155U - Manual (Page 424)

9-42
System Manual
C79000-G8576-C199-06
9.4.5 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 input/output module as follows:
Step Action
1 Release the upper locking bar on the subrack and swivel it up-
wards and out.
2 Insert the module at the desired slot in the subrack and push it
back in the guides.
3 Latch the module by rotating the locking pin by 90 o at the
lower end of the module. It must no longer be possible to pull
the module forwards.
4 Engage the front connector on the support pin of the module.
The width of the support pin also provides keying to prevent
front connectors from being fitted to the wrong modules (e.g.
front connectors with 115/230 V AC wiring cannot be plugged
into analog modules).
5 Tighten the screw in the upper part of the front connector.
Analog Input/Output Modules