19 Digital input/output module XN-322-16DIO-PD05
19.3 Wiring
125 XN300 slice modules 02/24 MN050002EN Eaton.com
19.3.4 Suppressor circuit for inductive loads
High induced voltages may be produced when inductive loads are switched
off. Because of this, the transistor outputs have internal suppressor circuits
to +24 V.
As shown in the diagram below, the voltage when switching off inductive
loads is limited to -29 V. In order to prevent system malfunctions caused by
voltage peaks (e.g., coupling on analog cables), it is recommended to use a
suppressor circuit (RC suppressors or flyback diodes) directly on inductive
loads.
Figure 76: Voltage limiting when switching off inductive loads
19.3.5 Wiring example
Figure 77: Wiring example showing how to connect inputs to X1/X2 and outputs to X3/X4
t [sec]
+24 V
+U
out
[V]
-0.7 V
-29 V
X3 X5
(X3/X4)
24V 0V
O1 O3O2 O4 O5 O7O6 O8
F1
X4
X1
I1 I2
I3 I4 I8
X2
I5 I6
I7
PE
24 V
0 V
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