SEW-Eurodrive MOVIPRO PHE Series, Руководство по эксплуатации, Страница: 15 / 100

3
Functional safety
Integrated safety technology
Operating Instructions – MOVIPRO
®
PHE..B-A15-.1X0..B-00
15
3 Functional safety
3.1 Integrated safety technology
3.1.1 Standards
For the versions of the standards valid during development and testing of the device,
refer to the declaration of conformity.
3.1.2 Safe state
For safety-related operation of the device, safe torque off is defined as safe condi-
tion .
The safety concept is based on this definition.
For safety-related operation of the device, safe torque off is defined as safe condition,
see "STO – Safe Torque Off" (→
2
16). The safety concept is based on this defini-
tion.
3.1.3 Safety concept
• The device allows for the connection of an external safety controller or an external
safety relay. They de-energize all active elements that generate the pulse trains to
the power output stage (IGBT) when a connected command device (e.g. emer-
gency stop button with latching function) is activated. For this purpose, the safety-
related DC 24 V supply is disconnected.
This ensures that the frequency inverter no longer supplies power to the motor for
generating torque.
• Disconnecting the safety-related DC 24 V supply voltage ensures that the voltage
supplies required for operating the drive are safely interrupted.
• Instead of galvanic isolation of the drive from the supply system using contactors
or switches, the disconnection of the safety-related DC 24 V supply described here
safely prevents the gating of the power semiconductors in the frequency inverter.
This means the rotary-field generation for the respective motor is deactivated even
though the mains voltage is still present.
23576855/EN – 10/2017