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NE-4100 Series User’s Manual Getting Started
3-8
For channels in digital output mode, “Low” and “High” status is controlled from within the web
console. When using a Digital Output LED as your output device, “Low” status will be expressed
by the LED lighting up, and “High” status will be expressed by the LED turning off.
Digital Output
DO0 DO1 DO2 DO3
: Low
: High
Digital Output LEDs
Digital Output LED Circuit Design
The figure shown below is the digital output LED circuit design. This is known as the “sink”
design.
3.3V
Dout
When developing your own applications, you need to be aware of the voltage limits shown below.
Min. Max. Unit Conditions
Low-level
Input Voltage
Maximum voltage when DI is set
to “Low” status.
----- 0.3xVCC V
High-level
Input Voltage
Minimum voltage when DI is set
to “High” status. 0.7xVCC ----- V
Low-level
Input Voltage
Maximum voltage when DO is set
to “Low” status. ----- 0.4 V
High-level
Input Voltage
Minimum voltage when DO is set
to “High” status
2.4 ----- V
The output current for digital output channels carries only 1 mA.