SEW-Eurodrive Movigear Performance MGF**-DFC-C Series, Operating Instructions Manual

Page: 375 / 416

12
Functional safety
Safety conditions
Operating Instructions – MOVIGEAR
®
performance
375
12.3 Safety conditions
The requirement for safe operation is that the drive safety functions of the drive unit
are properly integrated into an application-specific higher-level drive safety function. A
system/machine-specific risk assessment must be carried out by the system/machine
manufacturer and taken into account for the use of the drive system with the drive unit.
The system/machine manufacturer and the operator are responsible for compliance of
the system/machine with applicable safety regulations.
The following requirements are mandatory when installing and operating the drive unit
in safety-related applications:
• Approved devices.
• Installation requirements.
• Requirements on external safety controllers and safety relays.
• Startup requirements.
• Operation requirements.
12.3.1 Approved devices
The following device variants are permitted for safety-related applications:
Drive unit Nominal output current
MOVIGEAR
®
performance 2.0 – 5.5 A
12.3.2 Requirements on the installation
• The wiring technology used must comply with the standard EN 60204-1.
• The STO control cables must be routed according to EMC guidelines and as fol-
lows:
– Inside an electrical installation space: Single conductors can be routed.
– Outside a closed installation space: Shielded cables must be routed perman-
ently (fixed) and protected against external damage, or equivalent measures
have to be taken.
– Adhere to the regulations in force for the application.
– The sinking and sourcing cables from the external safety device to the axis
must be routed right next to each other with a cable length of ≤ 100 m.
– The sinking and sourcing cables from the external safety device to the axis
must have the same cable length. A difference in length ≤ 3% of the two cables
is permitted.
– Using suitable measures. the user must ensure that STO control cable is
routed separately from the power lines of the drive. This does not apply to
cables approved by SEW‑EURODRIVE specifically for this case of application.
• The STO function does not detect short circuits or interference voltage in the sup-
ply line. For this reason, one of the following 2 requirements must always be met:
– No parasitic voltages can occur in the STO control cables.
– The external safety controller can detect a crossfault from an external potential
to the STO control lines.
• Observe the values specified for safety components when designing the safety cir-
cuits.
25945475/EN – 04/2019