Festo CPX Series Manual page 172

5. 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. 5/4: Connection in 2-cable design
5-12
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
Festo P.BE-CPX-AX-EN en 1107f
4
5
4