RUT 955/956 Input/Output

[bdonnelly]

I have a use case where I’d like to read a maximum of 3 digital input (dry type) with one RUT 955/956.

I have been successful in reading one digital input (dry type) with I/O pins 1 and 6. But wasn’t successful using I/O pin 2 and 7.

Not sure if I needed to use an outside power supply for I/O pins 2 and 7 to work for a digital input (dry type). Any suggestions? Wiring drawings appreciated with explanation.

Separately, if I wanted to use I/O pins 1 and 6 to read one digital input (dry type) but also wanted to read an analog input using I/O pins 6 and 9, can I put two wires into pin 6? Or will that skew the analog input reading?

[Arturas]

Good afternoon,

Using I/O Pins 1 and 6 for Digital Input

You’ve successfully used I/O pins 1 and 6 for a digital input. This suggests that these pins are correctly configured for reading digital signals.

Issues with I/O Pins 2 and 7

If you’re having trouble with pins 2 and 7, ensure that:

Correct Configuration: Verify that these pins are configured as digital inputs in the router’s settings.
Voltage Levels: Ensure the voltage levels from your external device match the expected range for the router’s digital inputs.
Wiring: Double-check the wiring to ensure it’s correct and not causing any shorts or incorrect signal paths.

Wiring Diagram for Digital Inputs

Here’s a simplified wiring diagram concept for using I/O pins for digital inputs:

±--------------+
| External |
| Device |
±--------------+
|
|
v
±--------------+
| RUT 955/956 |
| I/O Pin 1 |
| (Input) |
±--------------+
|
|
v
±--------------+
| GND (Pin 6) |
±--------------+

For pins 2 and 7, if they are not designated as digital inputs or if you’re unsure, consult the router’s manual or contact Teltonika support for specific guidance.

Reading Analog Input with I/O Pins 6 and 9

Can You Use Pin 6 for Both Digital and Analog Inputs?

Sharing Pin 6: Generally, you should not share a pin for both digital and analog inputs simultaneously, especially if the analog input requires a specific voltage range or signal integrity. Sharing could skew the analog reading due to potential interference or voltage drops.
Wiring for Analog Input: For an analog input using pins 6 and 9, ensure that pin 6 is not used for any other purpose that could interfere with the analog signal. If pin 6 is used as a GND for the digital input, it should not be used as part of an analog circuit without proper isolation or consideration of potential interference.

Wiring Diagram for Analog Input

Here’s a simplified concept for wiring an analog input:

±--------------+
| External |
| Analog |
| Device |
±--------------+
|
|
v
±--------------+
| RUT 955/956 |
| I/O Pin 9 |
| (Analog In) |
±--------------+
|
|
v
±--------------+
| GND (Pin 6) |
±--------------+

Ensure that the analog input is properly configured in the router’s settings and that the voltage range of the external device matches the router’s analog input specifications.

Regards,
Arturas