CB-68LP wiring & connection to various instruments

[amyz]

I have a CB-68LP, which already has wires coming out of the following pins: 68, 34, 67, 33, 66, 32, 65, 31, 30, 63. I need to control and monitor a system using some LabVIEW PID controller VI's (through PCI-6024E). Where could I find specific info as to how the connections and wirings could be made?

[Sarah Thompson]

Amyz,

Application Note 025: "Field Wiring and Noise Considerations for Analog Signals" gives a great in-depth lesson on wiring in different modes for data acquisition. You can seach for this Application Note online at www.ni.com/support.

For device pin-outs for the PCI-6024E, they are available in the User Manual. All of NI's User Manuals can be found at www.ni.com/manuals.

Specific to the pins you mentioned:
68 - Analog CH 0
33 - Analog CH 1
65 - Analog CH 2
30 - Analog CH 3

34 - Analog CH 8
66 - Analog CH 9
31 - Analog CH 10
63 - Analog CH 11
67 - Analog Input Ground
32 - Analog Input Ground

In differential mode, these are the connections for Analog channels 0 through 3.

Have a great day.

[Gozali]

Dear NI expert,

I have a DAQCard-6024E and a CB-68LP and I want to LVDT +/- 10 volt.

My question are :

1. How many input range of CB-68LP ? Is it depending on DAQCard ?

2. If I want to connect the LVDT to CB-68LP, where is the  channel 0,1,2 etc, because on the CB-68LP there are  only pin number  1, 35, 2, 36, 3, 37  etc ?

3. Where is the ch+ and ch- on the CB-68LP ? is it need excitation ? if yes where is the pin number ?

Thank's.

Best regards,

Gozali

gmuhamad@gmail.com

[Matthew_W]

 Hi Gozali,

 1. The CB-68LP does not have a input range as it is a connector block. it will be the same as your DAQCard-6024E which is +-10v max.

 2. The pinout for the DAQCard-6024E can be found here. When you connect it to your CB-68LP then you'll find the desired function, say AI0 in the pinout chart that I linked to. Then you'll look at the number from the chart and find             that number on the CB-68LP, that will be AI0.

 3. If you setup a differential task to read your LVDT and are using channel AI0 then the AI0+ will be pin 68 (from the chart on page 13). The AI0- will be pin 34. Differential connections are always paired, simply add 8 to the Differential connector. For example, a differential AI1 connection will use AI1 as the positive input and AI9 as the negative input.

 4. The DAQCard-6024E will not provide high current excitation. You could probably use a Analog Output to provide low current (5mA) excitation but for a LVDT that will probably not be sufficient.
    Look at our SC-2345 carriers with SCC modules to provide signal conditioning for this application. Your DAQCard-6024E will plug into the SC-2345, your sensors will plug into the SC-2345 and be conditioned.

 
 Please post back if you still have a question regarding how to connect this up.

 Best regards,
  
 MatthewW
 Applications Engineer 
 National Instruments