Elettronica Santerno IRIS BLUE, Руководство по применению

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SINUS PENTA
PENTA MARINE
IRIS BLUE
STO FUNCTION
APPLICATION MANUAL
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1.2. Scope and Application
The drives support the Safe Torque Off (STO) function according to standards EN 61800-5-2:2007, EN
ISO 13849-1:2008, EN 61508:2010.
The STO may be used where power cut off is required to prevent unexpected start up. The STO function
disables the control voltage of the power semiconductors of the drive output stage, thus preventing the
inverter from generating the voltage required to rotate the motor (see diagram below). By using this
function, short-time operations (like cleaning) and/or maintenance activities on non-electrical parts of the
machinery can be performed without cutting off the power supply to the drive.
Figure 5 shows an example of a schematic diagram of STO with Safety Relay PILZ PNOZ X3 for safe
power cut off.