Siemens SINUMERIK 828D Function Manual page 15

Siemens sinamics s120 safety integrated

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For the "Safe Brake Control" function, the Motor/Power Module assumes a monitoring

function to ensure that when the Control Unit fails or malfunctions the brake current is

interrupted therefore closing the brake.

The brake diagnostics can only reliably detect a malfunction in either of the switches (TB+,

TB–) when the status changes, i.e. when the brake is released or applied.

If the Motor Module or Control Unit detects a fault, the brake current is switched off and the

safe status is reached.

Safety Integrated

Function Manual, 07/2012, 6FC5397-3EP40-3BA0

Description of Safety Integrated Basic Functions

2.3 Safe Brake Control (SBC)

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