SEW-Eurodrive MOVIMOT flexible MMF1 C/DBC Series User Manual

12
Functional safety
Safety conditions
Operating Instructions – MOVIMOT
®
flexible
351
12.3.3 Requirements on the external safety controller
A safety relay can be used as an alternative to a safety controller. The following re-
quirements apply analogously.
• The safety controller and all other safety-related subsystems must be approved for
at least the safety class that is required in the overall system for the respective ap-
plication-related drive safety function.
The following table shows an example of the required safety class of the safety
controller:
Application Safety controller requirements
Performance leveld according to
ENISO13849-1, SIL2 according to
EN62062
Performance leveld according to
ENISO13849-1
SIL2 according to EN61508
Performance levele according to
ENISO13849-1, SIL3 according to
EN62061
Performance levele according to
ENISO13849-1, SIL3 according to
EN61508
• The wiring of the safety controller must be suitable for the required safety class
(see manufacturer documentation). The STO input of the electronics cover can be
switched with 2poles (sourcing output, sourcing/sinking, or serial sourcing), or with
1pole (sourcing).
• The values specified for the safety controller must be strictly adhered to when
designing the circuit.
• Electro-sensitive protective equipment (such as light grid or scanner) according to
EN 61496‑1 and emergency stop buttons must not be directly connected to the
STO input. The connection must be made using safety relays, safety controllers
etc.
• To ensure protection against unintended restart in accordance with ENISO 14118,
the safe control system must be designed and connected in such a way that reset-
ting the command device alone does not lead to a restart. A restart may only be
carried out after a manual reset of the safety circuit.
• If no fault exclusion is used for the STO wiring according to ENISO 13849‑2 or
DINEN 61800‑5‑2, the external safety device must detect the following faults in
the STO wiring within 20s depending on the connection type:
– 2-pole sourcing output:
Short circuit of 24V at F_STO_P1 or F_STO_P2 (Stuck-at 1)
Crossfault between F_STO_P1 and F_STO_P2
– 2-pole sourcing/sinking:
Short circuit of 24V at F_STO_P1 (Stuck-at 1)
Short circuit of 0V at F_STO_M (Stuck-at 0)
– 2-pole serial sourcing:
Fault exclusion is mandatory
– 1-pole sourcing output:
Short circuit of 24V at F_STO_P (Stuck-at 1)
2-pole sourcing output:
• Test pulses can be used when the device is switched on or off.
– The test pulses on both sourcing channels must be switched with a time delay.
However, additional switch-off test pulses may occur simultaneously.
29129451/EN – 12/2019

SEW-Eurodrive MOVIMOT flexible MMF1 C/DBC Series Specifications

General

Brand	SEW-Eurodrive
Model	MOVIMOT flexible MMF1 C/DBC Series
Category	DC Drives
Language	English