Festo CPX Series Manual page 137

4. Analogue input module CPX−4AE−T
2−cable design
1
Constant source
of current in the
module
2
Connecting pin of
CPX module
3
Linked current/
voltage
connection
4
Combined
current/voltage
cable
5
Temperature
sensor
Fig. 4/4: Connection in 2−cable design
Festo P.BE−CPX−AX−EN en 0906e
If Ix+ is linked to Ux+ and if Ix− is linked to Ux− in the plug,
there remain only 2 cables which must be connected to the
sensor. With this most simple connection method, accuracy
is less because the voltage drop is no longer measured at
the sensor.
1 2
Ix+
Ux+
Ux−
Ix−
Usually only screened/shielded cables are permitted for the
transmission of analogue signals (see section 1.2.3).
3
3
4
5
4
4−13