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Installation
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AO-1604VIN-USB / AO-1604AIN-USB Reference Manual
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50
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4.
Connecting Analog Output Signal
(AO-1604AIN-USB)
The AO-1604VIN-USB has 4 channels of AO that supports current output.
1.
Connection Example of Current Output
Floating Load and Fixed Load
Two types of connection methods can be employed: fixed load and floating load.
"Floating load" is employed when the analog ground is connected to the negative side of an external
power supply. "Fixed load" is employed when the analog ground is connected to the load.
If the product is used as a load resistance, multiple current loops can be implemented by using the
same power supply.
The use of current output requires an external power supply (12 - 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.
The load resistance R
L
that is connected to the current output of each channel should be between
100 and 500Ω, including the output impedance of the connected device and wire resistance.
The Power Composition of Connecting to Multiple Load Resistors
Single Power Supply
Multiple Power Supplies
Floating Load
○
○
Fixed Load
X
○
Example of flat cable connection
Use a flat cable to connect the current output and the analog ground of each channel to the load
resistance R
L
.
Connecting to a Floating Load
