Siemens SINAMICS S120 Equipment Manual page 81

Electric shock due to unexpectedly long discharge time
If you operate the Active Interface Module without an Active Line Module, the discharge
time extends to more than 20 minutes after the supply voltage has been disconnected. As a
result, dangerous voltage may unexpectedly be present at the terminals of the Active
Interface Module.
Contact with live parts can result in death or serious injury.
• Only operate the Active Interface Module together with an Active Line Module.
Air-cooled chassis power units
Manual, 07/2019, 6SL3097-4AE00-0BP9
WARNING
Line-side power components
4.6 Active Interface Modules
79