Sc-2345

[miacrakishoin]

why is it that this carrier indicates 16 analog channels but you can only read 8? I am trying to read 4 temps and a pressure using the scc-tc02 for temp. one channel for signal and one for internal temp comp. and using the scc-sg24 for pressure. I can do three temps and one pressure but not four and one. NI shouldnt advertise their products as being able to do something if it cant . This is just bad business. Also using the Daq card 6062E

[AnalogKid2DigitalMan]

According to p177 the 2006 catalog:

J1-J8 accomodate SCC modules for analog conditioning.

J9-J16 sockets are for either digital I/O or dual stage analog conditioning.

The key is dual stage, which means output of  modules in J1-J8 are fed as inputs to modules in J9-J16. Still only 8 analog inputs to the outside world.

So it looks like National's advertising is correct.

[Yardov]

Hello Miacrakishoin,

If I understand correctly you have 4 TC02 and one SG24. TC02 have one channel because the CJC is build in (second channel is taken) and compensation is automatically made on software by the driver. SG24 has two channels.

Each JX (X= 1 to 😎 on the SC-2345 carrier has two AI. Therefore you can place the TC02 in slots 1 to 3 and the SG24 in slot 4.

On software you will have to configure this system according to page 11 on the manual (user guide).

Therefore you still have 16 Analog Inputs available but if you use them in differential mode (as TC) you will have only 8. Still your DAQ card has also 16 (or 8 in differential mode).

Regards,

Yardov

[AnalogKid2DigitalMan]

Yardov:

Was my interpretation of the catalog page incorrect, or does the catalog supply incomplete information?

Never have used SC or SCC modules, did not look at the manuals either.

Thanks

[Yardov]

Hey AnalogKid2DigitalMan,

Your interpretation was almost correct:

1. Yes, there J9 – J16 for dual stages modes. Actually output from J9-J16 feeds J1-J8 and not the other way around.

2. Yes, there are 8 AI inputs to the outside world but in differential mode.

To understand better these modes I recommend this white paper:

http://zone.ni.com/devzone/conceptd.nsf/webmain/01F147E156A1BE15862568650057DF15?opendocument

Table 1 shows how connections are performed.

I always recommend the user manual comparing to the data sheet for more technical specifications.

Regards,

Yardov