Emergency
stop switch
Button/Device used
to give the
acknowledgement *
STO
Ack.
X4-11 (DIN1A)
X4-12 (DIN1B)
X3-9 (+24 V)
X4-13 (DIN2A)
X4-14 (DIN2B)
Advanced safety
option board
X3-1 (STO 1)
X3-2 (STO 2)
STO
option board
OPTAF
STO
X3-3 (GND)
X3-4 (GND)
SD2+
SD1+
SD2-
SD1-
e3
0b
i3
79
.1
0
Illustration 11: Emergency Stop Configuration with the STO Function and Safe Acknowledgment
* = For some devices used for acknowledgment, additional wiring is required.
AN384043247178en-000101 / DPD01919 | 21
Danfoss A/S © 2021.08
Commissioning
VACON® NXP Advanced Safety Options
Installation Guide