3 Installation
Festo CDPX-… en 1203NH
3-10
The unit must always be grounded to earth. Grounding helps
limit the effects of noise due to electromagnetic interference
on the control system.
Earth connection will have to be done using either the screw
or the terminal located near the power supply terminal block.
A label helps identify the ground connection. Also connect to
ground the terminal 3 on the power supply terminal block.
The power supply circuit may be floating or grounded. In the
latter case, connect to ground the power source common as
shown in figure (see below) with a dashed line.
When using the floating power scheme, note that the panes
internally connects the power common to ground with a 1M
resistor in parallel with a 4,7nF capacitor.
The suggested wiring for the power supply is shown in
Fig. 3/8.
Fig 3/8: Power supply
All the electronic devices in the control system must be
properly grounded. Grounding must be performed according
to applicable regulations.
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