Two-Channel Assignment Of The Safe Digital Outputs; Figure 6-11 Two-Channel Assignment Of The Outputs - Leuze electronic MSI 200 Series User Manual

Actuator
Attainable safety integrity
Leuze electronic
6.5.3

Two-channel assignment of the safe digital outputs

O0
0V (O0-)
O1
0V (O1-)
Figure 6-11 Two-channel assignment of the outputs
K1 (R) and K2 (R) represent the forced normally closed contacts for state monitoring of the
relays (readback contacts).
Connect these contacts via safe digital inputs.
•
Evaluate the readback and, thus, the state of the switching elements in the safe applica-
•
tion program.
WARNING: Loss of the safety function
Parasitic voltages can lead to the loss of the safety function.
Exclude the possibility of parasitic voltages through appropriate wiring.
•
Key dates
Two-channel
SIL 3/SILCL 3/Cat. 4/PL e
Legend:
O0, 01,
K1
O0-, O1-,
K1 (R
0V
K1, K2
K1(R),
K2
K2(R)
K2 (R
M
MSI 100/200
Wiring examples
Outputs
External relays/contactors
Forced normally closed con-
tacts
59