Solution:

Please refer to our example "MAIExp.vi" for further more detail information. Due to the default channel number is 8, so you have to "pull down those 4 arrays to extend the number of channel". You can see the message on the window, "Pull down the array of ChanList, GainList, ExpChan and AI to extend the number of channel", "Remember to initialize these array by click the arrow of latest element". Besides, ChanList : means extension board's channel. GainList : mapped to 'ChanList'. ExpChan : means the channel on the extension board. AI : means the total extension channels' number. For example, I'd like to show each fist 4 channels of 3 PCLD-789 with PCL-818L. Following configuration just for your reference. Hardware: AMP Output CJC Output Channel AI channel number of the example PCLD-789D #1 0 X 0 - 3 0 - 3 PCLD-789D #2 1 X 0 - 3 4 - 7 PCLD-789D #3 2 X 0 - 3 8 - 11 The setting of the example: Start Channel : 0 NumOfChans : 12 ChanList : 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2 GainList : 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ExpChan : 0, 1, 2, 3, 0, 1, 2, 3, 0, 1, 2, 3 Then you can get each first 4 channels of 3 PCLD-789 with PCL-818L.