Siemens Sinumerik 840D sl Function Manual page 67

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Enabling the Safe Brake Control (SBC) function
The Safe Brake Control function is enabled via the following parameters:
S p9602 "SI enable Safe Brake Control (Control Unit)"
S p9802 "SI enable Safe Brake Control (Motor Module)"
The Safe Brake Control function is only selected if at least one safety monitoring
function is enabled (i.e. p9601 = p9801 ¸ 0).
Two- -channel brake control
Note
Controlling the brake via a relay for "Safe Brake Control"
If you use "Safe Brake Control", it is not permissible that you switch the brake via
a relay, as this could initiate brake control faults.
Note
The brake cannot be directly connected to the Motor Module in the chassis format.
The connection terminals are only designed for 24 V DC with 150 mA; the Safe
Brake Adapter is required for higher currents and voltages.
The brake is controlled from the Control Unit. Two signal paths are available for
applying the brake.
Figure 4-1 Two--channel brake control, booksize (example)
© Siemens AG 2015 All Rights Reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
Control Unit/Motor
Module/ Safe brake
Relay
Control
terminal 1
BR2
Safety Functions integrated in the drive
4.5 Safe Brake Control (SBC)
Control terminal 2
Motor module
P24
TB+
BR1
Brake diagnostics
TB- -
M M
Closed--circuit brake
BR+
Motor
BR--
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