Siemens Sinamics G110M Original Instructions Manual page 55

Figure 4-5 24V PSU Layout
Restrictions
Risk of electrical shock
The DC link within the Power Module (PM) carries high voltages which has the potential to
cause severe personal injury.
Before performing any installation work on the system, it is essential that all power supplies
to the system are disconnected.
After the power supplies have been disconnected from the system, it is necessary to wait
for at least five minutes before accessing any electrical connections of the system, this
allows time for the high voltage capacitors within the system to completely discharge.
The following restrictions should be observed when installing the 24V PSU:
● If an external braking resistor is not used, the cable gland opening must be sealed with a
blanking plug to maintain the IP rating of the system.
● The 24V DC IN and OUT connectors and the CPI must be sealed with screw caps to
maintain the IP rating of the system.
● When using the 24V PSU there is no longer any isolation between the 24V PSU and the
digital outputs of the system.
● Since the 24V PSU utilizes the DC link voltage to provide the 24V supply to the Control
Module, when the mains supply is disconnected, all power will be lost to the Control
Module.
● The 24V PSU is not suitable for use with the SINAMICS G110M AS-i variants of the
SINAMICS G110M system.
SINAMICS G110M Operating Instructions
Operating Instructions, 04/2015, FW V4.7.3, A5E31298649B AD
DANGER
Installation
4.2 System Installation
55