STO function option
Instruction handbook
b maXX
5800
Document No. 5.16027.04
Baumüller Nürnberg GmbH
110
8.1
8.1
STO function option
8.1.1
Safety notes according function STO (Safe Torque Off)
WARNING!
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When STO is activated, the drive is not disconnected from power supply.
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The safety function Safe Torque Off (STO) is not sufficient as the only safety
function for drives which are affected by a permanent moment, for example, in
case of suspended loads.
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The function STO may only be operated in combination with emergency stop de-
vices according to DIN EN ISO 13850 or safety sensors according to EN 61496.
WARNING!
In the unlikely event of a total failure of an internal driver (IGBT) or a control element,
a temporary excitation of the drive can occur (also if STO is active). The angular
movement covered depends on the rotor position and the number of pole pairs of the
motor. The maximum is 180°/number of pole pairs.
DANGER!
Danger due to moving engine parts!
The supply of the inputs by a connected safety component (emergency stop device,
safety light curtain) leads to the immediate supply of the driver stage. A converter
failure may lead to an unexpected start-up. Ensure by the use of the external safety
components that an unexpected start-up is prevented during commissioning.
Therefore:
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Maintain an adequate distance from moving machine parts/line parts or from the
moving machine/line.
