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11.6 Digital Inputs
NOTE:
for High Speed I/O information and refer to the datasheet for
i
³C Lite model
being used for details on jumper settings.
NOTE
:
The digital inputs on the i³C Lite
are designed for low voltage DC inputs.
The inputs are designed to support both positive and negative input modes. The mode is set by
software setting in
i
³ Config and a configuration parameter also in
i
³ Config. All the inputs on the unit
must be configured to the same mode.
Figure 11.4
–
Positive and Negative Inputs
In positive logic mode, a positi
ve voltage applied to the input will turn the input ‘On’. The internal
design of this mode is basically a resistor from the input to I/O ground. This mode is sometimes called
sourcing.
In negative logic mode, connecting the input to the I/O ground or zero
volts will turn the input ‘On’.
The internal design of this mode is basically a resistor from the input to the positive I/O voltage (usually
12V or 24V). This mode is sometimes called sinking.
Some of the digital inputs may support high-speed input functions such as counting or frequency
measurement.
Summary of Contents for i3C Lite
Page 1: ......
Page 8: ...Page 8 ...
Page 65: ...Page 65 Figure 9 3 Screen Calibration ...
Page 78: ...Page 78 Figure 11 2 Relay and Digital Output ...
Page 82: ...Page 82 Figure 11 5 Digital Input ...
Page 86: ...Page 86 11 9 RTD Wiring on J3 Connector ...
Page 110: ...Page 110 Figure 13 8 Alarm Configuration in i Config ...
Page 167: ...Page 167 ...
