Pilz PSS SB NOT, Basic license - Manual (Page 94)

8-10
Examples
Modular Block System: Emergency Stop Circuits
Feedback loop monitoring (shutdown with two contactors connected in
series), category 4
Block used: SB065/FBL
INFORMATION
To achieve category 4, two independent shutdown routes must be
available within the current path of the potentially dangerous drive. This
can be achieved, for example, by connecting two contactors in series.
Please note:
The feedback loops must be wired inside the control cabinet.
Fig. 8-9: Wiring diagram
L1 24 V
N
M1 M
K-M1.2
K-M1.1
FBL
K-M1.1
FBL
K-M1.2
M1
EIN
E0.01 E0.02 E0.08
PSS
A1.00
K-M1.1 K-M1.2
A1.08