1.6 SOMANET Node Safety (Original
instructions)
SOMANET Node Safety provides two drive integrated safety functions according to IEC 61800-5-2:2017
as a pure hardware solution
1. STO (Safe Torque Off) prevents the creation of torque in the motor and enables an uncontrolled
stop in accordance with stop category 0 of IEC 60204-1.
2. SBC (Safe Brake Control) provides a switchable (PWM) voltage output (0 V - U_bus) to directly and
safely control an external motor brake.
Attention
SOMANET Node Safety safely inhibits currents to the motor and to a brake when STO-SBC
command has been given (e.g. from an emergency stop device).
When the command has been released (e.g. manually resetting the emergency stop device) the
currents are allowed to be carried to the motor and to the brake.
The safety system must be designed to meet the requirement “restarting the machinery after a
stoppage must be possible only by an intended actuation of a control device provided for the
purpose”.
Specifications of the safety functions
Setup of the safety functions
Using the safety functions
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