wiring pressure differential 4-20mA signal to cFP-AI-110

[helplease]

PX series has the following wiring scheme:
2 terminals
Aux-
Zero-
3 terminals
(-)
Out
(+)
3 terminals
set point
relay
I would like to use the 4-20mA output signal.
using cFP-AI-110 & cFP-CB-1

[Cyril]

Trying to understand your post, only the title gives me an indication. Since the signal is differential you will not be able to wire several sensors to a cFP-AI-110 which is referenced single ended module( unless you use one module per channel...)

Regards,

Cyril Bouton
Applications Engineer
National Instruments

[helplease]

I am wiring a PX Series Pres-Differential to a cFP-AI-110 module. This device can be wired with 2-wire, loop-powered, 4-20mA output. I am not sure if the power is supplied by Field Point module or need external power supply. I have attached the device info pdf.
Thank you for your help!
Sharon

[Cyril]

Sharon,

If you want to use this device in loop powered, 4-20 mA output, you will need to wire the 24 VDC power supply to the V and C terminals of the cFP-AI-110. Then, wire the VSup terminal of the AI-110 to the + terminal of PX series,and the Iin terminal of the cFP to the - terminal of the PX series.(see page 7-Figure 7 of the manual linked below).

http://www.ni.com/pdf/manuals/323280a.pdf

Note that you could also use your device in 3 wire, voltage mode as indicated in figure 5-page 6.

Regards,

Cyril Bouton
Applications Engineer
National Instruments