SINAMICS Safety Integrated (Booksize)
Safe brake control (SBC)
5-159
E Siemens AG, 2004. All rights reserved
SINAMICS S120 Installation and Start-Up Manual, 12/04 Edition
5.3 Safe brake control (SBC)
Description
Safe brake control is used to activate holding brakes that function according to the
standby current principle (e.g. motor holding brake).
The command for releasing or applying the brake is transmitted to the Motor Mo-
dule via DRIVE-CLiQ. The Motor Module then carries out the action and activates
the outputs for the brake.
Brake activation via the brake connection on the Motor Module is carried out using
a safe, two-channel method.
!
Warning
“Safe brake control” does not detect faults in the brake itself (e.g. brake winding
short-circuit, worn brakes, and so on).
“Safe brake control” only detects faults in the brake cables (e.g. breakage) when
the status changes (when the brakes are released or applied).
Features of “Safe brake control (SBC)”
S When “Safe standstill” is selected or when safety monitors are triggered, “SBC”
is triggered by means of safe pulse disable.
S Unlike conventional brake control, “SBC” is triggered via p1215 with two
channels.
S “SBC” is triggered independently of the brake control mode set in p1215.
S The function needs to be enabled via parameters.
S Each time “Safe standstill” is selected, the holding brake is applied immediately
with forced dormant error detection.
Enabling the “Safe brake control (SBC)” function
The “Safe brake control” function is enabled via the following parameters:
S p9602 Safety Integrated enable safe brake control (Control Unit)
S p9802 Safety Integrated enable safe brake control (Motor Module)
The “Safe brake control” function is not active until at least one safety monitoring
function is enabled (i.e. p9601 = p9801 0).
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