Safe Brake Control (Sbc) Function - Omron 1 S Series User Manual

8 Safety Function
8-9

Safe Brake Control (SBC) Function

The Safe Brake Control (SBC) function is used to control the safety output for brakes; for example,
interlocking operation of Brake Interlock Output (BKIR) or it of STO or SS1 from a safety controller.
Use both of SBC1 and SBC2 when two-circuit brake system is constructed, or use one of them when
single-circuit brake system is constructed, as the brake control signal of SBC1/SBC2 output terminals
are synchronized. Each brake system has a different safety level. Refer to 8-9-5 Connection Examples
on page 8-119.
Connect an external brake via the safety relay when the drive current of the brake is higher than 2.21 A
which is the maximum SBC output terminal. For more information about the safety relay, refer to 8-9-8
Safety Relay Stuck Error Detection on page 8-121. Confirm the necessary settings to monitor the safety
relay.
There are four methods to activate the SBC function. (a) through (c) are recommended.
(a) To operate the SBC function with BKIR
(b) To operate the SBC function with STO function
(c) To operate the SBC function with SS1 function
(d) To operate the SBC function with SBC command from a safety controller
Possible to combine (a) through (d).
For (a), output logical AND of the SBC status and the BKIR status to the SBC output terminal. For more
information, refer to 8-9-3 Operation Procedure on page 8-116.
For (b) and (c), hold the motor axis when each function goes into the STO status. To use with the STO
function, refer to 8-2 Safe Torque OFF (STO) Function on page 8-22. To use with the SS1 function,
refer to 8-3 Safe Stop 1 (SS1) Function on page 8-39.
For (d), operate the SBC function from a safety controller at any given time.
Precautions for Correct Use
Do not use the SBC function to brake the motor while the operation. Injury or failure may result.
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1S-series with Built-in EtherCAT Communications and Safety Functionality User's Manual (I621)