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

8.2.2
Removing and Inserting
Modules
System Manual
C79000-B8576-C199-03
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 a digital input/output module as follows:
Step Action
1 Release the upper locking bar on the subrack and swivel it
upwards 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° at the
lower end of the module.
4 Engage the front connector on the support pin of the module
and swivel it up. The width of the support pin also provides
keying to prevent front connectors from being fitted to the
wrong modules (e.g. 230 V AC front connector on 24 V DC
modules).
5 Tighten the screw in the upper part of the front connector.
Installation and Startup
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