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2-8
Functional Description
Automatic channel scanning is a hardware feature. In multi-channel
range mode, the DAS-8 Series acquires all data from a consecutive
range of analog channels.
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The Start Channel’s gain only applies to the first channel.
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DriverLINX uses the Stop Channel’s gain for all the other
analog channels in the range.
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If the Start Channel is greater than the Stop Channel, the
channel sequence is [Start Channel, ..., Last Channel, 0, ...,
Stop Channel], where Last Channel is the highest numbered
channel for the DAS-8 model the application is using.
In multi-channel list mode, the DAS-8 Series acquires all data from a
random list of analog channels.
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The channel-gain list may contain up to 256 channels in any
order with any allowed gain.
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The list may repeat the same channel with the same or different
gains.
Automatic channel scanning is a hardware feature. The functions
used to create a group of channels (sequential or non-sequential) or a
channel-gain list emulate automatic channel scanning through
software. Therefore, the maximum attainable conversion frequency is
reduced when using a group of consecutive channels or a
channel-gain list.
Channel Expansion
If you require additional analog input channels or signal conditioning for
transducer inputs, you can use any combination of up to eight 16-channel
EXP-16 expansion boards, eight 16-channel EXP-16/A expansion boards,
and/or eight 8-channel EXP-GP expansion boards to increase the number
of available channels to 128. You can also use up to four MB-02
backplanes to increase the number of available channels to 68. When
using the DAS-8 series boards with the EXP-16(s), the DAS-8 series
board should be configured as single-ended inputs by setting Switch S2.
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