Sbc For Motor Modules In The Chassis Format - Siemens SINAMICS S120 Function Manual

The brake diagnosis can only reliably detect a malfunction in either of the switches
(TB+, TB-) when the status changes, i.e. when the brake is released or applied.
If the Motor Module or Control Unit detects a fault, the brake current is switched off. The
brake then closes and a safe state is reached.
10.6.1

SBC for Motor Modules in the chassis format

To be able to set higher power in the brakes of devices of this format, an additional Safe
Brake Adapter (SBA) module is needed. For more information about connecting and wiring
the Safe Brake Adapter, refer to the "SINAMICS G130/G150/S120 Chassis/S120 Cabinet
Modules/S150 Safety Integrated" Function Manual.
Using parameter p9621, you can define via which digital input the relay (NO contacts)
feedback signal of the Safe Brake Adapter is routed to the Control Unit.
To evaluate the feedback signal contacts, you must maintain the wait times caused by the
SBA. Parameter p9622 is pre-assigned with the SBA-relay wait times:
● p9622[0] ≙ wait time, switching on
● p9622[1] ≙ wait time, switching off
Further functionality and the activation of the brake, i.e. reaching the safe status, are in this
case the same as the above described procedure for booksize devices.
Safe Brake Control with power units in a parallel connection
Note
SBC for parallel connection of power units
Safe Brake Control with power units in a parallel connection is available if r9771.14 = 1.
If you wish to use SBC with SBA for chassis format power units connected in parallel, then it
is only permissible that you connect precisely one SBA to a power unit in the parallel
connection. The Safe Brake Adapter and therefore the brake are controlled via this power
unit.
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Safety Integrated Basic Functions
10.6 Safe Brake Control (SBC)
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