Siemens SINAMICS G120 Operating Instructions Manual page 273

Note
During forced dynamisation all connections of the Safe Brake Module are checked but in
operation the connection between Safe Brake Module and brake coil is not monitored.
Triggering the Brake Control with Standard Control Units
The motor brake function can be activated or deactivated via P1215. It controls a brake
relay, connected to the power module. This Brake Module controls an electro-mechanical
brake, which is always closed when powered down.
P1215 = 0
(motor brake not active - factory setting), that means, if a brake is available, it will be closed
to prevent the motor against unintended moves, e.g. after a parameter download.
P1215 = 1
(motor brake active) the brake will be controlled via terminals A and B on the power module.
Triggering the Brake Control with Contol Units with fail-safe functions
Prerequisite: P1215 = 1
Warning
The brake can be triggered via both, a Brake Module and a Safe Brake Relay.
Triggering via a Brake Module is not fail-safe!
For a fail-safe triggering of a Safe Brake Module the following parameters must be set:
P9602 = P9802 = 1 (factory setting is 0). If P9602 ≠ P9802 a fault will be generated.
In case of P9602 = P9802 = 1 a test signal regarding the signal to the Safe Brake Control is
generated and monitored.
This test signal does not interfere with the normal function of the mechanical brake. If the
mechanical brake is fitted and the test fails, a fault condition will be indicated by the inverter.
If the Safe Brake Control is deactivated by setting P9602 = P9802 = 0 the Safe Brake
Module will still work as intendet but will not be monitored in a safe way.
Control Units CU240S
Operating Instructions, 11/2006, A5E00766042B AA
Functions
8.15 Brake functions
8-77