Festo CPX Series Manual page 32

1. Overview and connection technology I/O modules
1-12
Screening plate type CPX-AB-S-4-12
Sub-base CPX-AB-4-M12x2-5POL (sockets without metal
thread) can be combined with a screening/shield plate.
Depending on what you have ordered, this may already be
fitted on the sub-base.
Instructions on subsequent fitting of the screening/shield
plate can be found in section 1.3.2.
The electromagnetic compatibility can be improved with
screening/shield plates, e.g. in environments heavily sub-
jected to interference or for analogue signals. For this pur-
pose the screening/shield plates must be earthed at the flat
contact intended for this purpose as per DIN 46 244 B2, 8-1
(2.8 x 1 mm).
Connect the earth cable of the screening/shield plate
•
with low impedance to the functional earth connection
(FE) as per Fig. 1/3.
Screening/shield plates lying next to each other are
connected together by spring clips and must not be
connected individually to FE.
If the intended plugs are used (see "Accessories", appen-
dix A.11), the plug housing will be connected to functional
earth via the screening/shield plate by means of the spring
contacts.
Before fitting the plugs screw the spring contacts as far as
•
possible onto the thread of the plug.
Festo P.BE-CPX-AX-EN en 1107f