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#1 ampicoj

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Posted 07 January 2013 - 02:55 PM

I am having trouble understanding the Mux80 channel mapping. Each CB37 has 14 AINs - numbered 0-13. The Mux80 silk screen says for connector X2, use address 120 thru 127. Which is 8 AINs. Similarly X3 says addresses 48 thru 61 - which is 14 AINs. X4 has 72 to 85 - again 14. X5 has 96 to 109 also 14. Is the X2 table wrong? Thanks, tim --

#2 LabJack Support

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Posted 07 January 2013 - 05:08 PM

The column X2 is correct, but if you look carefully, the asterisk says to start at AIN4. In short, only 8 mux channels can be accessed using connector X2, and Mux120 is labeled as AIN4 on the CB37. Mux121 would be AIN5 on the CB37, and so forth until Mux127, which is on screw terminal AIN11 of the CB37. AIN0-3 are presented in two places if you use the X2 connector. You can either use the screw terminals on the LabJack device, or AIN0-3 on the CB37. Basically X2 is a copy of the d-sub connector on the LabJack, except that AIN4-AIN11 are multiplexed channels, and AIN12/13 are not connected to anything. X2 is useful for people who want to still use FIO0-7, or the DAC outputs, but the connector is covered up by a Mux80.

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