Siemens SINAMICS S120 Function Manual page 232

Function modules
7.5 Braking Module
Acknowledgement of faults
When the Braking Module issues a fault message at binector input p3866, an attempt is
made to acknowledge the fault using signal p3861 at terminal X21.1 Booksize or X41.3
Chassis every 10 ms. Alarm A06900 is simultaneously is output.
Fast DC link discharge (booksize)
It is only possible to quickly discharge the DC link via the Braking Module for the booksize
design. 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.
NOTICE
Prerequisites for a fast DC link discharge is the use of a line contactor with feedback signal
(p0860) that is controlled via r0863.1.
Overview of key parameters (see SINAMICS S List Manual)
● r0108.26 Drive object function module - Braking Module
● p3860 Braking Module number of modules connected in parallel
● r3861 BO: Inhibit Braking Module
● p3862 Braking Module DC link fast discharge delay time
● p3863 BI: Braking Module activate DC link fast discharge
● p3864 BO: Braking Module DC link fast discharge
● p3865 Bi: Braking Module pre-alarm I*t shutdown
● p3866 BI: Braking Module fault
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Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
Drive Functions