5
Appendix
Connection of an external safety controller for STO
Manual – MOVIGEAR
®
B
36
5.4
Connection of an external safety controller for STO
5.4.1
Connection via terminals
The following figure shows a connection example with a safety controller and discon-
nection of all poles for STO:
[4]
[3]
2 STO ̶ IN
1 STO + IN
12 STO ̶ OUT
11 STO + OUT
[2]
[1]
DOn_P
DOn_M
2471315851
[1]
Installation space
[2]
Safety controller
[3]
MOVIGEAR
®
B
[4]
Connection terminals for STO
5.4.2
Connection via plug connectors
The following figure shows a connection example with a safety controller and discon-
nection of all poles for STO:
[2]
[1]
DOn_P
DOn_M
X5502
STO
[4]
2
4
[3]
9007201726583563
[1]
Installation space
[2]
Safety controller
[3]
MOVIGEAR
®
B
[4]
Plug connector for STO
INFORMATION
When wiring the STO signals, possible faults in plug connectors and cables/lines
have to be considered (see EN ISO 13849-2) and the installation has to be designed
according to the required safety class. MOVIGEAR
®
does not detect short circuits in
the supply line. SEW‑EURODRIVE therefore recommends to connect only STO sig-
nals to the STO input using a two-core cable, as shown in the figure.
22746250/EN – 12/2016
