Contec DAI12-4(USB)GY, User Manual

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3. Setup
DAI12-4(USB)GY
25
Controlling external device by current loop
Load that can be controlled by current loop have two sorts, floating
load and fixed load. If the module is used as a floating load,
multiple current loops can be implemented by using the same power
supply. The use of current output requires an external power supply
(17 - 24V). In such a case, a power supply with a small ripple
should be used in order to avoid an adverse impact on the conversion
accuracy due to a large power supply ripple.
Moreover, the load resistance R
L
that is connected to the current
output of each channel should be less than 500
Ω
, including the wire
resistance.
Figure 3.5. Connecting to a Floating Load
Figure 3.6. Connecting to a Fixed Load