Siemens SINAMICS S120 Manual page 228

DC link components
5.1 Braking Module
Note
Positions of the threshold switches
The switch positions of the threshold switches of the Braking Modules are positioned on the
panel as follows:
• Braking Modules for frame sizes FX, FB, GX, GB, GD: Position "1" is at the top; position
• Braking Modules for frame sizes HX and JX: Position "1" is at the back; position "2" is at
NOTICE
"Overvoltage" fault
Even when the response threshold is set to a low value, the DC-link voltage can still reach
the maximum voltage value (hardware shutdown threshold), thus triggering the
"Overvoltage" fault. This can occur, for example, in cases where there is too much
regenerative energy for the available braking power.
To prevent the DC-link voltage from exceeding the threshold, the Vdc-max controller must
be enabled (p1240) and the device supply voltage set accordingly (p0210).
226
"2" is at the bottom
the front
Manual, (GH3), 01/2013, 6SL3097-4AE00-0BP3
Chassis power units