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8-25
System Manual
C79000-G8576-C199-06
8.2.7
Arc-Quenching for Inductive Loads
Note
Digital output modules have integrated circuits on the module to quench
inductive loads (refer to the technical specifications of the output modules).
Exception: The 458 digital output module allows the switching of inductive
loads with contact protection submodules.
The integrated circuits on the modules for quenching inductive loads are
disabled if the load circuits are interrupted, either
operationally by contacts and switches,
or by fuses in the event of a fault.
This can result in excessive, inductive breaking voltages which put fault-free
operation at risk.
You can prevent this with additional, external quenching circuitry for the
inductive loads.
L–
N
Digital Output
Digital Output
AC Voltage
DC Voltage
L+
L
Contact, Switch
Contactor,
Solenoid Valve, etc.
Quenching Device
(Diode, Zener Diode, R/C Network or Varistor)
ELR
ELR
ELR
Figure 8-14
Quenching of Inductive Loads when the Load Circuit is Opened
Digital Input/Output Modules
Содержание S5-135U
Страница 10: ...x SystemManual C79000 G8576 C199 06 Contents ...
Страница 18: ...1 8 SystemManual C79000 G8576 C199 06 Notes on Using this Manual and on the CE Symbol ...
Страница 26: ...2 8 SystemManual C79000 G8576 C199 06 Centralized and Distributed Configuration of a Programmable Controller ...
Страница 66: ...3 40 SystemManual C79000 G8576 C199 06 Installation Guidelines ...
Страница 496: ...9 114 SystemManual C79000 G8576 C199 06 Analog Input Output Modules ...
Страница 536: ...11 24 SystemManual C79000 G8576 C199 06 Connector Assignments ...
Страница 558: ...Index 8 SystemManual C79000 G8576 C199 06 Index ...