Chapter 15 Safe Torque Off FunctionME300
15-2
15-1 Basic Function Description
The ME300 series provide a Safe Torque Off (STO) function. The ME300 series use dual-channel S1
and S2 signal inputs to turn off IGBT switching, further preventing the generation of motor torque in order
to achieve a safe stop. Refer to Figure 1 for the Safe Torque Off function circuit diagram.
The ME300 Safe Torque Off function meets the following international standards:
ISO 13849-1: 2015 Category 3 PL d
IEC 61508 SIL2
EN 62061 SIL CL 2
EN 60204-1 Category 0
Figure 1: The circuit diagram for the Safe Torque Off function
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