yhow,
Please take a look at the SC-2345/2350 Carrier User Manual. As shown in Table B-1 on page B-2, pins 1 and 2 on J4 correspond to AI(X) and No Connect. This would not give you the proper connection to measure your signal.
If you are trying to read two channels of analog input and you need some degree of signal conditioning, I would definitely recommend that you use one of our SCC-AI modules. If all you need is a direct connection to the analog channels of your 6220, you should use an SCC-FT01 module to provide access to the necessary pins. As you can see from the product page for the FT01, these modules are very inexpensive and provide a solid interface for connecting your signals. If you want to do referenced single ended (RSE) measurements, you can use one FT01 to read both of your input channels. If you want to take differential measurements, you would need to use two FT01 modules.
I would not recommend inserting wires directly into the sockets on the SC-2345, but if you absolutely have to do this, you can use the table that I previously mentioned to determine the proper connections.
