Safe Brake Control (Sbc) - Siemens SINUMERIK 828D Function Manual

Description of Safety Integrated Basic Functions

2.3 Safe Brake Control (SBC)

2.3 Safe Brake Control (SBC)
Overview
The "Safe Brake Control" function (SBC) is used to control holding brakes that function
according to the closed-circuit principle (e.g. motor holding brake).
SBC is (if configured) initiated together with STO. he Motor Module/Safe Brake Relay then
carries out the action and activates the outputs for the brake.
Brake activation via the brake connection on the Motor Module/Safe Brake Relay involves a
safe, two-channel method.
Features of the "Safe brake control" function
Supplementary conditions:
● SBC is executed when "Safe Torque Off" (STO) is selected.
● Unlike conventional brake control, SBC is executed via p1215 through two channels.
● SBC is executed regardless of the brake control or mode set in p1215. However, for
● When the state changes, electrical faults, such as e.g. a short-circuit in the brake winding
or wire breakage can be detected.
Two-channel brake control
The brake is essentially controlled from the Control Unit. Two signal paths are available for
applying the brake:
Figure 2-1
14
p1215 = 0 or 3, then SBC is not recommended.
Two-channel brake control, blocksize (example)
Function Manual, 07/2012, 6FC5397-3EP40-3BA0
Safety Integrated