18
Manual – MOVIAXIS® MMD60B - Functional Safety
4
Connection of an external safety controller for STO
Connection Variants
4.4
Connection of an external safety controller for STO
The following figure shows a connection example with a safety controller and disconnec-
tion of all poles for STO:
The safety controller must be able to detect a short circuit against ground at the M
output.
2951024523
[1] Installation space
[2] Safety controller
[3] Plug connector for STO
[2]
[1]
DOn_P
DOn_M
X50
STO
[3]
2
4
®
MOVIAXIS
MMD60B
INFORMATION
When wiring the STO signals, possible faults in plug connectors and cables/lines have
to be considered (see ISO 13849-2) and the installation has to be designed according
to the required safety class. MOVIAXIS
®
MMD60B does not detect short circuits in the
supply line. SEW-EURODRIVE therefore recommends to connect only STO signals to
the STO input using a two-core cable, as shown in the figure.
