17 Digital output module XN-322-16DO-P05
17.1 Pin assignment and status LED signals
XN300 slice modules 02/24 MN050002EN Eaton.com 110
17.1.5 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 69: Voltage limiting when switching off inductive loads
t [sec]
+24 V
+U
out
[V]
-0.7 V
-29 V
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