Flex Inputs - Logic IO RTCU NX-200 Technical Manual

RTCU NX-200 Technical Manual V1.00
Advanced Automotive M2MI/IoT Gateway

Flex Inputs

The flex inputs are multi-mode inputs that can be configured to operate as either analog or as
digital inputs. The operating range is from 0V to 30V DC and is configurable as digital inputs with
customized threshold values.
The flex inputs can also be used as digital inputs, either behaving the same way as the normal
digital inputs with the same threshold values or by using different threshold values for more
advanced features.
The same flex input can be used for multiple digital inputs with different settings, e.g., different
threshold values or debounce timing.
Configuring the flex input for band matching allows triggering the digital inputs at specific values,
making it possible to connect circuits that generate different voltages for different states and then
read the state directly.
An example could be using switches and resistors to create an R2R ladder that allows for
connecting multiple switches to a single flex input.
See the RTCU IDE documentation for more details about how to configure the flex inputs as digital
inputs.
The input signal is connected between FLXINx and AGND. AGND must be connected to the
reference of the connected equipment. Please be aware that deviations may occur, as the system is
very noise sensitive. Avoid long unshielded wires, and large fast-changing signals routed parallel
to the analog signals.
The inputs are low-pass filtered, ESD- and transient protected.
X5: 6 pin FLXIN connector overview
Pin Name
1 FLXIN1
4 FLXIN2
2 FLXIN3
5 FLXIN4
3 AGND
6 AGND
Logic IO ApS.
Holmboes Allé 14
8700 Horsens
Denmark
Description
Flex input 1
Flex input 2
Flex input 3
Flex input 4
Analog Ground
Analog Ground
Page 19 of 45
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