Siemens SINAMICS S120 Function Manual page 442

Function modules
8.4 Braking Module External
Fast DC link discharge (booksize)
It is only possible to quickly discharge the DC link via the Braking Module External for the
booksize format. It is activated via binector input p3863 and started after the line contactor
opens and the adjustable delay time (p3862) has expired. The fast discharge is completed
when the line contactor contact closes.
Note
A fast DC link discharge requires the use of a line contactor with feedback signal (p0860)
that is controlled via r0863.1.
Overview of important parameters (see SINAMICS S120/S150 List Manual)
• r0108.26
• p3860
• r3861.0...7
• p3862
• p3863
• p3864.0...7
• p3865[0...7]
• p3866[0...7]
442
Drive object function module; Braking Module External
Braking Module number of modules connected in parallel
BO: Braking Module inhibit/acknowledgement
Braking module, DC link fast discharge delay time
BI: Braking Module, activate DC link fast discharge
BO: Braking Module DC link fast discharge
BI: Braking Module pre-alarm I*t shutdown
BI: Braking Module fault
Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4
Drive functions