Eaton XN300 - Page 106

16 Digital output module XN-322-12DO-P17
16.3 Wiring topic
XN300 slice modules 02/24 MN050002EN Eaton.com 102
16.3.4 Suppressor circuit for inductive loads
Induced voltages may be produced when inductive loads are switched off.
Accordingly, the transistor outputs have internal suppressor circuits to +24 V
in order to protect the XN300 slice module.
As shown in the diagram below, the voltage when switching off inductive
loads is limited to -12 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.d
Figure 65: Voltage limiting when switching off inductive loads
t [sec]
+24 V
+U
out
[V]
-0.7 V
-12 V