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

Drive functions

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Response time with the "Safe Brake Control" function

For the response times when the function is selected/deselected via input terminals, see the

table in "Response times".

Controlling the brake via a relay for "Safe Brake Control":

If you use the "Safe Brake Control (SBC)" function, the use of relays/contactors can cause

faults in the brake control when brakes are switched. For this reason, this type of control is

not generally enabled.

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

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

Drive functions

Function Manual, (FH1), 04/2014, 6SL3097-4AB00-0BP4

Safety Integrated basic functions

10.6 Safe Brake Control (SBC)

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