WAGO -I/O-SYSTEM 750 Manual page 73

WAGO-I/O-SYSTEM 750
750-667/000-003 4FDI/4FDO 24V/2A PROFIsafe V2 iPar
Figure 3: Connection Variant with Diode Recovery Circuit
When shutting down an inductive load, the magnetic energy stored in the
inductive load must be dissipated. This magnetic energy converted by a diode
recovery circuit into heat. You can convert the magnetic energy into heat with the
F I/O module or with a suitable external diode recovery circuit.
The diode recovery circuit integrated in the F I/O module has a different limitation
of negative voltage depending on the connection variant and the value of the field
voltage.
Figure 4: Connection Variant with 2 Diode Recovery Circuits
If you connect the inductive load to the Ox+ and Ox- connections, you have to
make sure when selecting the external diode recovery circuit that the negative
voltage is limited to a value less than -60 V. Otherwise, the magnetic energy is
converted by the F I/O module into heat.
You can connect an inductive load between the digital power output Ox+ and the
common (ground) connection of the field supply voltage 0 V and/or a second
inductive load between the digital power output Ox- and the positive connection
of the field supply voltage U
In this case, pay attention to the voltage values listed in the table when selecting
the external diode recovery circuit.
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Version 1.4.2, valid from HW/SW Version 01/02
Connect Devices 73
Manual