ADLINK Technology USB-2401, User Manual

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Introduction 19
USB-2401
Table 1-3: I/O Signal Description
Signal Name Reference Direction Description
GND<0..3> -------- Ground of excitation
voltage/current, with
GND<0..3> and DGND
connected on board
DGND -------- Digital ground, DGND and
GND<0..3> are connected
on board
AI<0..4> GND I Differential analog Input
channels 0~3
CI<0..4> GND I Current input channel 0~3.
EXC<0..3> GND O Excitation output for channel
0~3; can be configured to
voltage output (2.5V) or
current output (1mA) by
software, with corresponding
ground pin GND<0..3>
SC<0..3> GND I Sensor (small signal) input
channel 0~3
GPI<0..3> DGND I Function digital input <0..3>
GPO<0..3> DGND O Function digital output <0,1>
N/C N/C N/C No connection