12
Functional safety
Safety conditions
Operating Instructions – MOVIMOT
®
flexible
350
12.3.2 Requirements on the installation
• The wiring technology used must comply with the standard EN60204-1.
• 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 ≤100m.
– 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.
• The STO signal (F_STO_P1, F_STO_P2, and F_STO_M) may not be used for
feedback.
• For safety controller/safety relays, you must only use grounded voltage sources
with protective electrical separation (PELV) according to EN 61131-2 and
EN60204-1.
• If several voltage sources are used, each voltage source must be connected to a
PE system.
• When planning the installation, observe the technical data of the electronics cover.
• When the STO control cables are routed to Terminal X9 in the electronics cover,
the cable ends must be covered with conductor end sleeves and the cables must
be fixed close to the terminal X9 using cable ties. Other low-voltage signals can be
bundled together with the STO signals.
• Do not use the port 24V_OUT of the electronics cover for safety-related applica-
tions. This voltage is only permitted to supply the M12 plug connector X5504 when
the STO jumper is plugged in.
• To use the drive unit in safety-related applications, remove the jumpers labeled
with "Caution, remove jumper for safety operation" from the STO terminal X9. No
labeled jumpers are available for those designs where the STO connection is per-
formed using plug connectors. The installed jumper is relevant to the function.
29129451/EN – 12/2019
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